Duke Energy Carolinas 10-Q9 May 232023 Q1 Quarterly reportFinancial data

Company Profile

Cover Page

Cover Page - shares	3 Months Ended
Cover Page - shares	Mar. 31, 2023	Apr. 30, 2023
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Entity File Number	1-32853
Entity Registrant Name	DUKE ENERGY CORPORATION
Entity Tax Identification Number	20-2777218
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	526 South Church Street
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28202-1803
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		770,651,719
Entity Central Index Key	0001326160
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Amendment Flag	false
Duke Energy Carolinas
Entity Information [Line Items]
Entity File Number	1-4928
Entity Registrant Name	DUKE ENERGY CAROLINAS, LLC
Entity Tax Identification Number	56-0205520
Entity Incorporation, State or Country Code	NC
Entity Address, Address Line One	526 South Church Street
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28202-1803
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000030371
Current Fiscal Year End Date	--12-31
Progress Energy
Entity Information [Line Items]
Entity File Number	1-15929
Entity Registrant Name	PROGRESS ENERGY, INC.
Entity Tax Identification Number	56-2155481
Entity Incorporation, State or Country Code	NC
Entity Address, Address Line One	410 South Wilmington Street
Entity Address, City or Town	Raleigh
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27601-1748
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001094093
Current Fiscal Year End Date	--12-31
Duke Energy Progress
Entity Information [Line Items]
Entity File Number	1-3382
Entity Registrant Name	DUKE ENERGY PROGRESS, LLC
Entity Tax Identification Number	56-0165465
Entity Incorporation, State or Country Code	NC
Entity Address, Address Line One	410 South Wilmington Street
Entity Address, City or Town	Raleigh
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27601-1748
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000017797
Current Fiscal Year End Date	--12-31
Duke Energy Florida
Entity Information [Line Items]
Entity File Number	1-3274
Entity Registrant Name	DUKE ENERGY FLORIDA, LLC
Entity Tax Identification Number	59-0247770
Entity Incorporation, State or Country Code	FL
Entity Address, Address Line One	299 First Avenue North
Entity Address, City or Town	St. Petersburg
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33701
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000037637
Current Fiscal Year End Date	--12-31
Duke Energy Ohio
Entity Information [Line Items]
Entity File Number	1-1232
Entity Registrant Name	DUKE ENERGY OHIO, INC.
Entity Tax Identification Number	31-0240030
Entity Incorporation, State or Country Code	OH
Entity Address, Address Line One	139 East Fourth Street
Entity Address, City or Town	Cincinnati
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	45202
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000020290
Current Fiscal Year End Date	--12-31
Duke Energy Indiana
Entity Information [Line Items]
Entity File Number	1-3543
Entity Registrant Name	DUKE ENERGY INDIANA, LLC
Entity Tax Identification Number	35-0594457
Entity Incorporation, State or Country Code	IN
Entity Address, Address Line One	1000 East Main Street
Entity Address, City or Town	Plainfield
Entity Address, State or Province	IN
Entity Address, Postal Zip Code	46168
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000081020
Current Fiscal Year End Date	--12-31
Piedmont
Entity Information [Line Items]
Entity File Number	1-6196
Entity Registrant Name	PIEDMONT NATURAL GAS COMPANY, INC.
Entity Tax Identification Number	56-0556998
Entity Incorporation, State or Country Code	NC
Entity Address, Address Line One	4720 Piedmont Row Drive
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28210
City Area Code	704
Local Phone Number	364-3120
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000078460
Current Fiscal Year End Date	--12-31
Common Stock
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	DUK
Security Exchange Name	NYSE
Junior Subordinated Debentures 5.625% Coupon Due September 2078
Entity Information [Line Items]
Title of 12(b) Security	5.625% Junior Subordinated Debentures
Trading Symbol	DUKB
Security Exchange Name	NYSE
Depositary Share
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares
Trading Symbol	DUK PR A
Security Exchange Name	NYSE
Senior Notes 3.10% Due 2028
Entity Information [Line Items]
Title of 12(b) Security	3.10% Senior Notes
Trading Symbol	DUK 28A
Security Exchange Name	NYSE
Senior Notes 3.85% Due 2034
Entity Information [Line Items]
Title of 12(b) Security	3.85% Senior Notes
Trading Symbol	DUK 34
Security Exchange Name	NYSE

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Operating Revenues
Regulated electric		$ 6,324	$ 5,933
Regulated natural gas		882	1,002
Nonregulated electric and other		70	76
Total operating revenues		7,276	7,011
Operating Expenses
Operation, maintenance and other		1,310	1,548
Depreciation and amortization		1,227	1,257
Property and other taxes		389	382
Impairment of assets and other charges		8	215
Total operating expenses		5,609	5,700
Gains on Sales of Other Assets and Other, net		7	3
Operating Income		1,674	1,314
Other Income and Expenses
Equity in earnings of unconsolidated affiliates		20	26
Other income and expenses, net		151	89
Total other income and expenses		171	115
Interest Expense		720	569
Income From Continuing Operations Before Income Taxes		1,125	860
Income Tax Expense From Continuing Operations		155	25
Income From Continuing Operations		970	835
Loss from discontinued operations, net of tax		(209)	(15)
Net Income		761	820
Add: Net Loss Attributable to Noncontrolling Interests		43	37
Net Income Attributable to Parent		804	857
Less: Preferred Dividends		39	39
Net Income Available to Common Stockholders		$ 765	$ 818
Basic (in usd per share)		$ (0.19)	$ 0.02
Diluted (in usd per share)		$ (0.19)	$ 0.02
Other Comprehensive Income, net of tax
Pension and OPEB adjustments	[1]	$ (1)	$ 2
Net unrealized gain on cash flow hedges	[1]	(20)	113
Unrealized (losses) gains on available-for-sale securities	[1]	6	(13)
Other Comprehensive Income (Loss), net of tax	[1]	(26)	107
Comprehensive Income		735	927
Add: Comprehensive Loss Attributable to Noncontrolling Interests		(43)	(29)
Comprehensive Income Attributable to Duke Energy Corporation		$ 778	$ 956
Income from continuing operations available to Duke Energy Corporation common stockholders
Diluted (in usd per share)		$ 1.20	$ 1.06
Basic (in usd per share)		1.20	1.06
(Loss) Income from discontinued operations attributable to Duke Energy Corporation common stockholders
Basic (usd per share)		(0.19)	0.02
Diluted (usd per share)		(0.19)	0.02
Net income available to Duke Energy Corporation common stockholders
Basic (in usd per share)		1.01	1.08
Diluted (in usd per share)		$ 1.01	$ 1.08
Weighted average shares outstanding
Basic (in shares)		770	770
Diluted (in shares)		770	770
Fuel used in electric generation and purchased power
Operating Expenses
Cost of sales		$ 2,377	$ 1,817
Cost of natural gas
Operating Expenses
Cost of sales		298	481
Duke Energy Carolinas
Operating Revenues
Total operating revenues		1,934	1,888
Operating Expenses
Cost of sales		623	448
Operation, maintenance and other		440	512
Depreciation and amortization		366	379
Property and other taxes		95	93
Impairment of assets and other charges		2	3
Total operating expenses		1,526	1,435
Operating Income		408	453
Other Income and Expenses
Total other income and expenses		59	55
Interest Expense		160	141
Income From Continuing Operations Before Income Taxes		307	367
Income Tax Expense From Continuing Operations		35	27
Net Income Attributable to Parent		272	340
Other Comprehensive Income, net of tax
Comprehensive Income Attributable to Duke Energy Corporation		272	340
Progress Energy
Operating Revenues
Total operating revenues		3,048	2,992
Operating Expenses
Cost of sales		1,191	1,064
Operation, maintenance and other		568	645
Depreciation and amortization		504	536
Property and other taxes		168	152
Impairment of assets and other charges		5
Total operating expenses		2,436	2,397
Gains on Sales of Other Assets and Other, net		6	2
Operating Income		618	597
Other Income and Expenses
Total other income and expenses		59	35
Interest Expense		246	211
Income From Continuing Operations Before Income Taxes		431	421
Income Tax Expense From Continuing Operations		72	67
Net Income		359	354
Other Comprehensive Income, net of tax
Net unrealized gain on cash flow hedges			1
Unrealized (losses) gains on available-for-sale securities		2	(2)
Other Comprehensive Income (Loss), net of tax		2	(1)
Comprehensive Income		361	353
Duke Energy Progress
Operating Revenues
Total operating revenues		1,533	1,632
Operating Expenses
Cost of sales		545	574
Operation, maintenance and other		350	391
Depreciation and amortization		315	306
Property and other taxes		48	49
Impairment of assets and other charges		4
Total operating expenses		1,262	1,320
Gains on Sales of Other Assets and Other, net			1
Operating Income		271	313
Other Income and Expenses
Total other income and expenses		29	22
Interest Expense		102	85
Income From Continuing Operations Before Income Taxes		198	250
Income Tax Expense From Continuing Operations		29	35
Net Income Attributable to Parent		169	215
Other Comprehensive Income, net of tax
Comprehensive Income Attributable to Duke Energy Corporation		169	215
Duke Energy Florida
Operating Revenues
Total operating revenues		1,510	1,355
Operating Expenses
Cost of sales		646	490
Operation, maintenance and other		213	249
Depreciation and amortization		190	231
Property and other taxes		120	103
Impairment of assets and other charges		1
Total operating expenses		1,170	1,073
Gains on Sales of Other Assets and Other, net		1	1
Operating Income		341	283
Other Income and Expenses
Total other income and expenses		30	15
Interest Expense		115	84
Income From Continuing Operations Before Income Taxes		256	214
Income Tax Expense From Continuing Operations		51	43
Net Income Attributable to Parent		205	171
Other Comprehensive Income, net of tax
Unrealized (losses) gains on available-for-sale securities		2	(1)
Other Comprehensive Income (Loss), net of tax		2	(1)
Comprehensive Income Attributable to Duke Energy Corporation		207	170
Duke Energy Ohio
Operating Revenues
Regulated electric		474	412
Regulated natural gas		235	226
Total operating revenues		709	638
Operating Expenses
Operation, maintenance and other		123	178
Depreciation and amortization		90	80
Property and other taxes		80	101
Total operating expenses		561	593
Operating Income		148	45
Other Income and Expenses
Total other income and expenses		8	6
Interest Expense		36	30
Income From Continuing Operations Before Income Taxes		120	21
Income Tax Expense From Continuing Operations		20	(56)
Net Income Attributable to Parent		100	77
Other Comprehensive Income, net of tax
Comprehensive Income Attributable to Duke Energy Corporation		100	77
Duke Energy Ohio \| Fuel used in electric generation and purchased power
Operating Expenses
Cost of sales		176	127
Duke Energy Ohio \| Cost of natural gas
Operating Expenses
Cost of sales		92	107
Duke Energy Indiana
Operating Revenues
Total operating revenues		975	822
Operating Expenses
Cost of sales		449	319
Operation, maintenance and other		184	192
Depreciation and amortization		158	156
Property and other taxes		18	25
Impairment of assets and other charges			211
Total operating expenses		809	903
Operating Income		166	(81)
Other Income and Expenses
Total other income and expenses		14	10
Interest Expense		52	45
Income From Continuing Operations Before Income Taxes		128	(116)
Income Tax Expense From Continuing Operations		22	(37)
Net Income Attributable to Parent		106	(79)
Other Comprehensive Income, net of tax
Comprehensive Income Attributable to Duke Energy Corporation		106	(79)
Piedmont
Operating Revenues
Total operating revenues		675	805
Operating Expenses
Cost of sales		206	374
Operation, maintenance and other		89	95
Depreciation and amortization		57	54
Property and other taxes		16	16
Total operating expenses		369	539
Operating Income		306	266
Other Income and Expenses
Total other income and expenses		16	13
Interest Expense		40	32
Income From Continuing Operations Before Income Taxes		282	247
Income Tax Expense From Continuing Operations		50	33
Net Income		232	214
Net Income Attributable to Parent		232	214
Other Comprehensive Income, net of tax
Comprehensive Income Attributable to Duke Energy Corporation		$ 232	$ 214

[1]Net of income tax benefit of approximately $8 million and income tax expense of approximately $32 million for the three months ended March 31, 2023, and 2022, respectfully.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income		$ 761	$ 820
Other Comprehensive Income, net of tax
Pension and OPEB adjustments	[1]	(1)	2
Net unrealized gains (losses) on cash flow hedges	[1]	(20)	113
Reclassification into earnings from cash flow hedges	[1]		5
Net unrealized losses on fair value hedges	[1]	(11)
Unrealized (losses) gains on available-for-sale securities	[1]	6	(13)
Other Comprehensive Income (Loss), net of tax	[1]	(26)	107
Comprehensive Income		735	927
Add: Comprehensive Loss Attributable to Noncontrolling Interests		43	29
Comprehensive Income Attributable to Duke Energy Corporation		778	956
Less: Preferred Dividends		39	39
Comprehensive Income Available to Duke Energy Corporation Common Stockholders		$ 739	$ 917

[1]Net of income tax benefit of approximately $8 million and income tax expense of approximately $32 million for the three months ended March 31, 2023, and 2022, respectfully.

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Other comprehensive income (loss), tax expense (benefit)	$ (8)	$ 32

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents		$ 409
Receivables (net of allowance for doubtful accounts)	$ 2,635	3,106
Receivables of VIEs (net of allowance for doubtful accounts)	1,035	1,309
Inventory	3,865	3,584
Assets held for sale	374	356
Regulatory assets (includes amounts related to VIEs)	3,502	3,485
Other (including amounts related to VIEs)	452	973
Total current assets	12,314	13,222
Property, Plant and Equipment
Cost	166,096	163,839
Accumulated depreciation and amortization	(53,162)	(52,100)
Facilities to be retired, net	8	9
Net property, plant and equipment	112,942	111,748
Other Noncurrent Assets
Goodwill	19,303	19,303
Other Noncurrent Assets: Regulatory assets	14,702	14,645
Nuclear decommissioning trust funds	9,124	8,637
Operating lease right-of-use assets, net	1,019	1,042
Investments in equity method unconsolidated affiliates	465	455
Assets held for sale	5,538	5,634
Other	3,426	3,400
Total other noncurrent assets	53,577	53,116
Total Assets	178,833	178,086
Current Liabilities
Accounts payable	3,214	4,754
Notes payable and commercial paper	3,731	3,952
Taxes accrued	586	722
Interest accrued	693	626
Current maturities of long-term debt (includes amounts related to VIEs)	3,330	3,878
Asset retirement obligations	732	773
Regulatory liabilities	1,283	1,466
Liabilities associated with assets held for sale	476	535
Other	1,970	2,167
Total current liabilities	16,015	18,873
Long-Term Debt (includes amounts related to VIEs)	69,107	65,873
Other Noncurrent Liabilities
Deferred income taxes	10,188	9,964
Total noncurrent ARO	11,987	11,955
Regulatory liabilities	13,714	13,582
Operating lease liabilities	851	876
Accrued pension and other post-retirement benefit costs	820	832
Investment tax credits	852	849
Liabilities associated with assets held for sale	1,931	1,927
Other	1,417	1,502
Total other noncurrent liabilities	41,760	41,487
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	44,837	44,862
Retained earnings	2,626	2,637
Accumulated other comprehensive (loss) income	(166)	(140)
Total Parent stockholders' equity	49,260	49,322
Noncontrolling interests	2,691	2,531
Total equity	51,951	51,853
Total Liabilities and Equity	$ 178,833	$ 178,086
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares outstanding (in shares)	771,000,000	770,000,000
VIEs
Current Assets
Regulatory assets (includes amounts related to VIEs)	$ 106
Other (including amounts related to VIEs)	42	$ 116
Other Noncurrent Assets
Other Noncurrent Assets: Regulatory assets	1,691	1,715
Other	50	52
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	101	350
Long-Term Debt (includes amounts related to VIEs)	3,334	3,108
Preferred stock, Series A
Equity
Preferred stock	973	973
Preferred stock, Series B
Equity
Preferred stock	989	989
Duke Energy Carolinas
Current Assets
Cash and cash equivalents	24	44
Receivables (net of allowance for doubtful accounts)	286	338
Receivables of VIEs (net of allowance for doubtful accounts)	782	928
Receivables from affiliated companies	181	390
Inventory	1,303	1,164
Regulatory assets (includes amounts related to VIEs)	1,311	1,095
Other (including amounts related to VIEs)	62	216
Total current assets	3,949	4,175
Property, Plant and Equipment
Cost	55,422	54,650
Accumulated depreciation and amortization	(19,082)	(18,669)
Net property, plant and equipment	36,340	35,981
Other Noncurrent Assets
Other Noncurrent Assets: Regulatory assets	4,309	4,293
Nuclear decommissioning trust funds	5,076	4,783
Operating lease right-of-use assets, net	75	78
Other	998	1,036
Total other noncurrent assets	10,458	10,190
Total Assets	50,747	50,346
Current Liabilities
Accounts payable	872	1,472
Accounts payable to affiliated companies	236	209
Notes payable to affiliated companies	1,153	1,233
Taxes accrued	110	228
Interest accrued	142	120
Current maturities of long-term debt (includes amounts related to VIEs)	18	1,018
Asset retirement obligations	249	261
Regulatory liabilities	418	530
Other	572	580
Total current liabilities	3,770	5,651
Long-Term Debt (includes amounts related to VIEs)	14,787	12,948
Long-Term Debt Payable to Affiliated Companies	300	300
Other Noncurrent Liabilities
Deferred income taxes	4,263	4,153
Total noncurrent ARO	5,148	5,121
Regulatory liabilities	5,817	5,783
Operating lease liabilities	80	83
Accrued pension and other post-retirement benefit costs	35	38
Investment tax credits	299	300
Other	534	527
Total other noncurrent liabilities	16,176	16,005
Commitments and Contingencies
Equity
Member's equity	15,720	15,448
Accumulated other comprehensive (loss) income	(6)	(6)
Total member's equity	15,714	15,442
Total Liabilities and Equity	50,747	50,346
Duke Energy Carolinas \| VIEs
Current Assets
Regulatory assets (includes amounts related to VIEs)	12	12
Other (including amounts related to VIEs)	5	8
Other Noncurrent Assets
Other Noncurrent Assets: Regulatory assets	205	208
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	10
Long-Term Debt (includes amounts related to VIEs)	713	689
Progress Energy
Current Assets
Cash and cash equivalents	93	108
Receivables (net of allowance for doubtful accounts)	315	318
Receivables of VIEs (net of allowance for doubtful accounts)	1,101	1,289
Receivables from affiliated companies	24	22
Notes receivable from affiliated companies	118
Inventory	1,712	1,579
Regulatory assets (includes amounts related to VIEs)	1,548	1,833
Other (including amounts related to VIEs)	166	342
Total current assets	5,077	5,491
Property, Plant and Equipment
Cost	65,852	64,822
Accumulated depreciation and amortization	(21,011)	(20,584)
Net property, plant and equipment	44,841	44,238
Other Noncurrent Assets
Goodwill	3,655	3,655
Other Noncurrent Assets: Regulatory assets	7,422	7,146
Nuclear decommissioning trust funds	4,048	3,855
Operating lease right-of-use assets, net	604	628
Other	1,097	1,066
Total other noncurrent assets	16,826	16,350
Total Assets	66,744	66,079
Current Liabilities
Accounts payable	1,127	1,481
Accounts payable to affiliated companies	410	712
Notes payable to affiliated companies	845	843
Taxes accrued	172	135
Interest accrued	224	206
Current maturities of long-term debt (includes amounts related to VIEs)	699	697
Asset retirement obligations	272	289
Regulatory liabilities	473	576
Other	771	782
Total current liabilities	4,993	5,721
Long-Term Debt (includes amounts related to VIEs)	22,522	21,592
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	5,226	5,147
Total noncurrent ARO	5,898	5,892
Regulatory liabilities	4,796	4,753
Operating lease liabilities	521	546
Accrued pension and other post-retirement benefit costs	289	292
Investment tax credits	362	358
Other	222	222
Total other noncurrent liabilities	17,314	17,210
Commitments and Contingencies
Equity
Additional paid-in capital	11,830	11,832
Retained earnings	9,944	9,585
Accumulated other comprehensive (loss) income	(9)	(11)
Total equity	21,765	21,406
Total Liabilities and Equity	$ 66,744	$ 66,079
Common stock, shares authorized (in shares)	100	100
Common stock, shares outstanding (in shares)	100	100
Progress Energy \| VIEs
Current Assets
Regulatory assets (includes amounts related to VIEs)	$ 94	$ 94
Other (including amounts related to VIEs)	33	88
Other Noncurrent Assets
Other Noncurrent Assets: Regulatory assets	1,486	1,507
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	341	340
Long-Term Debt (includes amounts related to VIEs)	1,955	2,003
Duke Energy Progress
Current Assets
Cash and cash equivalents	50	49
Receivables (net of allowance for doubtful accounts)	159	167
Receivables of VIEs (net of allowance for doubtful accounts)	654	793
Receivables from affiliated companies	26	25
Notes receivable from affiliated companies	160
Inventory	1,082	1,006
Regulatory assets (includes amounts related to VIEs)	764	690
Other (including amounts related to VIEs)	57	174
Total current assets	2,952	2,904
Property, Plant and Equipment
Cost	39,396	38,875
Accumulated depreciation and amortization	(14,452)	(14,201)
Net property, plant and equipment	24,944	24,674
Other Noncurrent Assets
Other Noncurrent Assets: Regulatory assets	4,817	4,724
Nuclear decommissioning trust funds	3,640	3,430
Operating lease right-of-use assets, net	356	370
Other	659	650
Total other noncurrent assets	9,472	9,174
Total Assets	37,368	36,752
Current Liabilities
Accounts payable	511	601
Accounts payable to affiliated companies	252	508
Notes payable to affiliated companies		238
Taxes accrued	56	77
Interest accrued	90	101
Current maturities of long-term debt (includes amounts related to VIEs)	370	369
Asset retirement obligations	272	288
Regulatory liabilities	293	332
Other	412	384
Total current liabilities	2,256	2,898
Long-Term Debt (includes amounts related to VIEs)	11,527	10,568
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	2,531	2,477
Total noncurrent ARO	5,552	5,535
Regulatory liabilities	4,178	4,120
Operating lease liabilities	320	335
Accrued pension and other post-retirement benefit costs	158	160
Investment tax credits	129	124
Other	89	76
Total other noncurrent liabilities	12,957	12,827
Commitments and Contingencies
Equity
Total member's equity	10,478	10,309
Total Liabilities and Equity	37,368	36,752
Duke Energy Progress \| VIEs
Current Assets
Regulatory assets (includes amounts related to VIEs)	39	39
Other (including amounts related to VIEs)	15	42
Other Noncurrent Assets
Other Noncurrent Assets: Regulatory assets	672	681
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	34
Long-Term Debt (includes amounts related to VIEs)	1,096	1,114
Duke Energy Florida
Current Assets
Cash and cash equivalents	26	45
Receivables (net of allowance for doubtful accounts)	154	148
Receivables of VIEs (net of allowance for doubtful accounts)	447	496
Receivables from affiliated companies	3	2
Inventory	630	573
Regulatory assets (includes amounts related to VIEs)	784	1,143
Other (including amounts related to VIEs)	67	108
Total current assets	2,111	2,515
Property, Plant and Equipment
Cost	26,448	25,940
Accumulated depreciation and amortization	(6,552)	(6,377)
Net property, plant and equipment	19,896	19,563
Other Noncurrent Assets
Other Noncurrent Assets: Regulatory assets	2,605	2,422
Nuclear decommissioning trust funds	408	424
Operating lease right-of-use assets, net	247	258
Other	393	372
Total other noncurrent assets	3,653	3,476
Total Assets	25,660	25,554
Current Liabilities
Accounts payable	616	880
Accounts payable to affiliated companies	110	177
Notes payable to affiliated companies	886	605
Taxes accrued	131	53
Interest accrued	106	80
Current maturities of long-term debt (includes amounts related to VIEs)	330	328
Asset retirement obligations	1	1
Regulatory liabilities	180	244
Other	320	363
Total current liabilities	2,680	2,731
Long-Term Debt (includes amounts related to VIEs)	9,353	9,381
Other Noncurrent Liabilities
Deferred income taxes	2,811	2,789
Total noncurrent ARO	346	357
Regulatory liabilities	618	633
Operating lease liabilities	201	211
Accrued pension and other post-retirement benefit costs	110	111
Investment tax credits	233	234
Other	77	84
Total other noncurrent liabilities	4,396	4,419
Commitments and Contingencies
Equity
Member's equity	9,237	9,031
Accumulated other comprehensive (loss) income	(6)	(8)
Total member's equity	9,231	9,023
Total Liabilities and Equity	25,660	25,554
Duke Energy Florida \| VIEs
Current Assets
Regulatory assets (includes amounts related to VIEs)	55
Other (including amounts related to VIEs)	18	46
Other Noncurrent Assets
Other Noncurrent Assets: Regulatory assets	814	826
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	307	306
Long-Term Debt (includes amounts related to VIEs)	859	890
Duke Energy Ohio
Current Assets
Cash and cash equivalents	26	16
Receivables (net of allowance for doubtful accounts)	74	73
Receivables from affiliated companies	196	247
Notes receivable from affiliated companies	258
Inventory	157	144
Regulatory assets (includes amounts related to VIEs)	54	103
Other (including amounts related to VIEs)	33	86
Total current assets	798	669
Property, Plant and Equipment
Cost	12,543	12,497
Accumulated depreciation and amortization	(3,282)	(3,250)
Net property, plant and equipment	9,261	9,247
Other Noncurrent Assets
Goodwill	920	920
Other Noncurrent Assets: Regulatory assets	623	581
Operating lease right-of-use assets, net	17	18
Other	74	71
Total other noncurrent assets	1,634	1,590
Total Assets	11,693	11,506
Current Liabilities
Accounts payable	284	380
Accounts payable to affiliated companies	65	72
Notes payable to affiliated companies	72	497
Taxes accrued	227	317
Interest accrued	31	29
Current maturities of long-term debt (includes amounts related to VIEs)	475	475
Asset retirement obligations	14	17
Regulatory liabilities	62	99
Other	66	74
Total current liabilities	1,296	1,960
Long-Term Debt (includes amounts related to VIEs)	3,491	2,745
Long-Term Debt Payable to Affiliated Companies	25	25
Other Noncurrent Liabilities
Deferred income taxes	1,142	1,136
Total noncurrent ARO	140	137
Regulatory liabilities	530	534
Operating lease liabilities	17	17
Accrued pension and other post-retirement benefit costs	91	90
Other	95	96
Total other noncurrent liabilities	2,015	2,010
Commitments and Contingencies
Equity
Common stock	762	762
Additional paid-in capital	3,100	3,100
Retained earnings	1,004	904
Total Parent stockholders' equity	4,866	4,766
Total equity	4,866	4,766
Total Liabilities and Equity	$ 11,693	$ 11,506
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Common stock, shares outstanding (in shares)	90,000,000	90,000,000
Duke Energy Indiana
Current Assets
Cash and cash equivalents	$ 11	$ 31
Receivables (net of allowance for doubtful accounts)	90	112
Receivables from affiliated companies	228	298
Inventory	560	489
Regulatory assets (includes amounts related to VIEs)	91	249
Other (including amounts related to VIEs)	64	197
Total current assets	1,044	1,376
Property, Plant and Equipment
Cost	18,295	18,121
Accumulated depreciation and amortization	(6,136)	(6,021)
Net property, plant and equipment	12,159	12,100
Other Noncurrent Assets
Other Noncurrent Assets: Regulatory assets	903	875
Operating lease right-of-use assets, net	48	49
Other	265	254
Total other noncurrent assets	1,216	1,178
Total Assets	14,419	14,654
Current Liabilities
Accounts payable	247	391
Accounts payable to affiliated companies	60	206
Notes payable to affiliated companies	204	435
Taxes accrued	106	92
Interest accrued	59	48
Current maturities of long-term debt (includes amounts related to VIEs)	3	303
Asset retirement obligations	197	207
Regulatory liabilities	207	187
Other	145	161
Total current liabilities	1,228	2,030
Long-Term Debt (includes amounts related to VIEs)	4,350	3,854
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	1,313	1,299
Total noncurrent ARO	741	744
Regulatory liabilities	1,517	1,454
Operating lease liabilities	46	47
Accrued pension and other post-retirement benefit costs	123	122
Investment tax credits	186	186
Other	31	65
Total other noncurrent liabilities	3,957	3,917
Commitments and Contingencies
Equity
Member's equity	4,733	4,702
Accumulated other comprehensive (loss) income	1	1
Total member's equity	4,734	4,703
Total Liabilities and Equity	14,419	14,654
Piedmont
Current Assets
Receivables (net of allowance for doubtful accounts)	245	436
Receivables from affiliated companies	11	11
Inventory	99	172
Regulatory assets (includes amounts related to VIEs)	121	119
Other (including amounts related to VIEs)	9	4
Total current assets	485	742
Property, Plant and Equipment
Cost	11,101	10,869
Accumulated depreciation and amortization	(2,136)	(2,081)
Facilities to be retired, net	8	9
Net property, plant and equipment	8,973	8,797
Other Noncurrent Assets
Goodwill	49	49
Other Noncurrent Assets: Regulatory assets	389	392
Operating lease right-of-use assets, net	3	4
Investments in equity method unconsolidated affiliates	78	79
Other	278	272
Total other noncurrent assets	797	796
Total Assets	10,255	10,335
Current Liabilities
Accounts payable	191	345
Accounts payable to affiliated companies	39	51
Notes payable to affiliated companies	343	514
Taxes accrued	61	74
Interest accrued	43	40
Current maturities of long-term debt (includes amounts related to VIEs)	45	45
Regulatory liabilities	122	74
Other	58	81
Total current liabilities	902	1,224
Long-Term Debt (includes amounts related to VIEs)	3,319	3,318
Other Noncurrent Liabilities
Deferred income taxes	897	870
Total noncurrent ARO	27	26
Regulatory liabilities	1,016	1,024
Operating lease liabilities	12	13
Accrued pension and other post-retirement benefit costs	7	7
Other	170	180
Total other noncurrent liabilities	2,129	2,120
Commitments and Contingencies
Equity
Common stock	1,635	1,635
Retained earnings	2,269	2,037
Total Parent stockholders' equity	3,904	3,672
Noncontrolling interests	1	1
Total equity	3,905	3,673
Total Liabilities and Equity	$ 10,255	$ 10,335
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares outstanding (in shares)	100,000,000	100,000,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Allowance for doubtful accounts - receivables	$ 45	$ 40
Regulatory Assets: Current	3,502	3,485
Current Assets: Other	452	973
Other Noncurrent Assets: Regulatory assets	14,702	14,645
Other	3,426	3,400
Current maturities of long-term debt (includes amounts related to VIEs)	3,330	3,878
Long-term debt	$ 69,107	$ 65,873
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares outstanding (in shares)	771,000,000	770,000,000
VIEs
Allowance for doubtful accounts - receivables of VIEs	$ 169	$ 176
Regulatory Assets: Current	106
Current Assets: Other	42	116
Other Noncurrent Assets: Regulatory assets	1,691	1,715
Other	50	52
Current maturities of long-term debt (includes amounts related to VIEs)	101	350
Long-term debt	$ 3,334	$ 3,108
Preferred stock, Series A
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Preferred stock, depositary shares authorized (in shares)	40,000,000	40,000,000
Preferred stock, depositary shares outstanding (in shares)	40,000,000	40,000,000
Preferred stock, Series B
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Preferred stock, depositary shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, depositary shares outstanding (in shares)	1,000,000	1,000,000
Duke Energy Carolinas
Allowance for doubtful accounts - receivables	$ 5	$ 3
Allowance for doubtful accounts - receivables of VIEs	65
Regulatory Assets: Current	1,311	1,095
Current Assets: Other	62	216
Other Noncurrent Assets: Regulatory assets	4,309	4,293
Other	998	1,036
Current maturities of long-term debt (includes amounts related to VIEs)	18	1,018
Long-term debt	14,787	12,948
Duke Energy Carolinas \| VIEs
Regulatory Assets: Current	12	12
Current Assets: Other	5	8
Other Noncurrent Assets: Regulatory assets	205	208
Current maturities of long-term debt (includes amounts related to VIEs)	10
Long-term debt	713	689
Progress Energy
Allowance for doubtful accounts - receivables	14	13
Regulatory Assets: Current	1,548	1,833
Current Assets: Other	166	342
Other Noncurrent Assets: Regulatory assets	7,422	7,146
Other	1,097	1,066
Current maturities of long-term debt (includes amounts related to VIEs)	699	697
Long-term debt	$ 22,522	$ 21,592
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100	100
Common stock, shares outstanding (in shares)	100	100
Progress Energy \| VIEs
Allowance for doubtful accounts - receivables of VIEs	$ 61	$ 68
Regulatory Assets: Current	94	94
Current Assets: Other	33	88
Other Noncurrent Assets: Regulatory assets	1,486	1,507
Current maturities of long-term debt (includes amounts related to VIEs)	341	340
Long-term debt	1,955	2,003
Duke Energy Progress
Allowance for doubtful accounts - receivables	5	4
Regulatory Assets: Current	764	690
Current Assets: Other	57	174
Other Noncurrent Assets: Regulatory assets	4,817	4,724
Other	659	650
Current maturities of long-term debt (includes amounts related to VIEs)	370	369
Long-term debt	11,527	10,568
Duke Energy Progress \| VIEs
Allowance for doubtful accounts - receivables of VIEs	40
Regulatory Assets: Current	39	39
Current Assets: Other	15	42
Other Noncurrent Assets: Regulatory assets	672	681
Current maturities of long-term debt (includes amounts related to VIEs)	34
Long-term debt	1,096	1,114
Duke Energy Florida
Allowance for doubtful accounts - receivables	9	8
Regulatory Assets: Current	784	1,143
Current Assets: Other	67	108
Other Noncurrent Assets: Regulatory assets	2,605	2,422
Other	393	372
Current maturities of long-term debt (includes amounts related to VIEs)	330	328
Long-term debt	9,353	9,381
Duke Energy Florida \| VIEs
Allowance for doubtful accounts - receivables of VIEs	21	28
Regulatory Assets: Current	55
Current Assets: Other	18	46
Other Noncurrent Assets: Regulatory assets	814	826
Current maturities of long-term debt (includes amounts related to VIEs)	307	306
Long-term debt	859	890
Duke Energy Ohio
Allowance for doubtful accounts - receivables	7	6
Regulatory Assets: Current	54	103
Current Assets: Other	33	86
Other Noncurrent Assets: Regulatory assets	623	581
Other	74	71
Current maturities of long-term debt (includes amounts related to VIEs)	475	475
Long-term debt	$ 3,491	$ 2,745
Common stock, par value (in usd per share)	$ 8.50	$ 8.50
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Common stock, shares outstanding (in shares)	90,000,000	90,000,000
Duke Energy Indiana
Allowance for doubtful accounts - receivables	$ 4	$ 4
Regulatory Assets: Current	91	249
Current Assets: Other	64	197
Other Noncurrent Assets: Regulatory assets	903	875
Other	265	254
Current maturities of long-term debt (includes amounts related to VIEs)	3	303
Long-term debt	4,350	3,854
Piedmont
Allowance for doubtful accounts - receivables	14	14
Regulatory Assets: Current	121	119
Current Assets: Other	9	4
Other Noncurrent Assets: Regulatory assets	389	392
Other	278	272
Current maturities of long-term debt (includes amounts related to VIEs)	45	45
Long-term debt	$ 3,319	$ 3,318
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares outstanding (in shares)	100,000,000	100,000,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 761	$ 820
Net loss attributable to Duke Energy		804	857
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		1,344	1,480
Equity component of AFUDC		(46)	(46)
Deferred income taxes		90	(11)
Impairment of assets and other charges		8	215
Impairment of assets and other charges		228	215
Equity in earnings of unconsolidated affiliates		(20)	(25)
Payments for asset retirement obligations		(117)	(119)
Provision for rate refunds		(33)	(31)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		5	215
Receivables		754	5
Inventory		(275)	28
Other current liabilities		(266)	(269)
Other current assets(a)	[1]	262	(327)
Increase (decrease) in
Accounts payable		(1,193)	(160)
Taxes accrued		(148)	(90)
Other assets	[1]	(20)	(26)
Other liabilities		157	136
Net cash provided by (used in) operating activities		1,483	1,795
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(3,146)	(2,551)
Contributions to equity method investments		(6)	(17)
Purchases of debt and equity securities		(866)	(1,516)
Proceeds from sales and maturities of debt and equity securities		882	1,530
Net proceeds from the sales of other assets		76	0
Other		(149)	(145)
Net cash used in investing activities		(3,209)	(2,699)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		4,085	3,506
Payments for the redemption of long-term debt		(1,380)	(1,215)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days		2
Payments for the redemption of short-term debt with original maturities greater than 90 days		(50)	(257)
Notes payable and commercial paper		(217)	213
Contributions from noncontrolling interests		206	23
Dividends paid		(815)	(799)
Other		(84)	(67)
Net cash provided by financing activities		1,747	1,404
Net increase (decrease) in cash, cash equivalents and restricted cash		21	500
Cash, cash equivalents and restricted cash at beginning of period		603	520
Cash, cash equivalents and restricted cash at end of period		624	1,020
Cash, cash equivalents and restricted cash at beginning of period		409
Significant non-cash transactions:
Accrued capital expenditures		1,366	1,028
Duke Energy Carolinas
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		272	340
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		426	447
Equity component of AFUDC		(24)	(22)
Deferred income taxes		32	44
Impairment of assets and other charges		2	3
Payments for asset retirement obligations		(39)	(35)
Provision for rate refunds		(19)	(18)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions			50
Receivables		199	77
Receivables from affiliated companies		209	56
Inventory		(139)	(13)
Other current liabilities		(78)	56
Other current assets(a)	[2]	(293)	(230)
Increase (decrease) in
Accounts payable		(594)	(225)
Accounts payable to affiliated companies		27	(17)
Taxes accrued		(119)	(150)
Other assets	[2]	206	6
Other liabilities		76	(44)
Net cash provided by (used in) operating activities		144	325
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(866)	(717)
Purchases of debt and equity securities		(556)	(1,008)
Proceeds from sales and maturities of debt and equity securities		556	1,008
Notes receivable from affiliated companies			(492)
Other		(59)	(54)
Net cash used in investing activities		(925)	(1,263)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		1,845	1,217
Payments for the redemption of long-term debt		(1,007)	(1)
Notes payable to affiliated companies		(79)	(226)
Distributions to parent			(50)
Other		(1)	(1)
Net cash provided by financing activities		758	939
Net increase (decrease) in cash, cash equivalents and restricted cash		(23)	1
Cash, cash equivalents and restricted cash at beginning of period		53	8
Cash, cash equivalents and restricted cash at end of period		30	9
Cash, cash equivalents and restricted cash at beginning of period		44
Cash, cash equivalents and restricted cash at end of period		24
Significant non-cash transactions:
Accrued capital expenditures		449	352
Progress Energy
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		359	354
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		554	625
Equity component of AFUDC		(16)	(12)
Deferred income taxes		51	72
Impairment of assets and other charges		5
Payments for asset retirement obligations		(58)	(68)
Provision for rate refunds		(14)	(16)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions			164
Receivables		188	(123)
Receivables from affiliated companies		(2)	102
Inventory		(133)	(5)
Other current liabilities		(107)	(113)
Other current assets(a)	[3]	319	(224)
Increase (decrease) in
Accounts payable		(214)	26
Accounts payable to affiliated companies		(302)	(142)
Taxes accrued		36	30
Other assets	[3]	(212)	(80)
Other liabilities		4	40
Net cash provided by (used in) operating activities		458	630
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(1,275)	(981)
Purchases of debt and equity securities		(279)	(531)
Proceeds from sales and maturities of debt and equity securities		304	548
Notes receivable from affiliated companies		(118)	(237)
Other		(71)	(28)
Net cash used in investing activities		(1,439)	(1,229)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		996	889
Payments for the redemption of long-term debt		(66)	(54)
Notes payable to affiliated companies		2	(1)
Dividends to parent			(250)
Other		(1)	(3)
Net cash provided by financing activities		931	581
Net increase (decrease) in cash, cash equivalents and restricted cash		(50)	(18)
Cash, cash equivalents and restricted cash at beginning of period		184	113
Cash, cash equivalents and restricted cash at end of period		134	95
Cash, cash equivalents and restricted cash at beginning of period		108
Cash, cash equivalents and restricted cash at end of period		93
Significant non-cash transactions:
Accrued capital expenditures		516	349
Duke Energy Progress
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		169	215
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		360	350
Equity component of AFUDC		(13)	(7)
Deferred income taxes		27	19
Impairment of assets and other charges		4
Payments for asset retirement obligations		(46)	(41)
Provision for rate refunds		(14)	(16)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions			164
Receivables		144	(70)
Receivables from affiliated companies		(1)	63
Inventory		(76)	(19)
Other current liabilities		(86)	(67)
Other current assets(a)		(61)	(75)
Increase (decrease) in
Accounts payable		(3)	18
Accounts payable to affiliated companies		(256)	(50)
Taxes accrued		(21)	(85)
Other assets		(16)	(56)
Other liabilities		21	47
Net cash provided by (used in) operating activities		132	390
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(666)	(467)
Purchases of debt and equity securities		(239)	(481)
Proceeds from sales and maturities of debt and equity securities		236	480
Notes receivable from affiliated companies		(160)	(328)
Other		(33)	(19)
Net cash used in investing activities		(862)	(815)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		991	889
Payments for the redemption of long-term debt		(32)	(21)
Notes payable to affiliated companies		(239)	(172)
Distributions to parent		0	(250)
Other		(1)	(1)
Net cash provided by financing activities		719	445
Net increase (decrease) in cash, cash equivalents and restricted cash		(11)	20
Cash, cash equivalents and restricted cash at beginning of period		79	39
Cash, cash equivalents and restricted cash at end of period		68	59
Cash, cash equivalents and restricted cash at beginning of period		49
Cash, cash equivalents and restricted cash at end of period		50
Significant non-cash transactions:
Accrued capital expenditures		176	111
Duke Energy Florida
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		205	171
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		194	273
Equity component of AFUDC		(3)	(5)
Deferred income taxes		21	52
Impairment of assets and other charges		1
Payments for asset retirement obligations		(12)	(28)
(Increase) decrease in
Receivables		42	(54)
Receivables from affiliated companies		(1)
Inventory		(57)	14
Other current liabilities		(27)	(52)
Other current assets(a)	[3]	363	(72)
Increase (decrease) in
Accounts payable		(211)	9
Accounts payable to affiliated companies		(67)	(89)
Taxes accrued		79	45
Other assets	[3]	(193)	(24)
Other liabilities		(8)	(6)
Net cash provided by (used in) operating activities		326	234
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(609)	(514)
Purchases of debt and equity securities		(40)	(49)
Proceeds from sales and maturities of debt and equity securities		68	69
Other		(38)	(10)
Net cash used in investing activities		(619)	(504)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		5
Payments for the redemption of long-term debt		(34)	(34)
Notes payable to affiliated companies		281	269
Other		(1)	(1)
Net cash provided by financing activities		251	234
Net increase (decrease) in cash, cash equivalents and restricted cash		(42)	(36)
Cash, cash equivalents and restricted cash at beginning of period		86	62
Cash, cash equivalents and restricted cash at end of period		44	26
Cash, cash equivalents and restricted cash at beginning of period		45
Cash, cash equivalents and restricted cash at end of period		26
Significant non-cash transactions:
Accrued capital expenditures		340	237
Duke Energy Ohio
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		100	77
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		91	81
Equity component of AFUDC			(3)
Deferred income taxes		(3)	(51)
Payments for asset retirement obligations		(1)
Provision for rate refunds			5
(Increase) decrease in
Receivables			(5)
Receivables from affiliated companies		17	15
Inventory		(11)	2
Other current liabilities		(42)	(89)
Other current assets(a)		94	48
Increase (decrease) in
Accounts payable		(60)	88
Accounts payable to affiliated companies		(7)
Taxes accrued		(90)	(56)
Other assets		1	(17)
Other liabilities		(1)	74
Net cash provided by (used in) operating activities		88	169
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(232)	(210)
Losses on sales of other assets		75
Notes receivable from affiliated companies		(224)	29
Other		(16)	(6)
Net cash used in investing activities		(397)	(187)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		749
Notes payable to affiliated companies		(425)	21
Other		(5)	(1)
Net cash provided by financing activities		319	20
Net increase (decrease) in cash, cash equivalents and restricted cash		10	2
Cash, cash equivalents and restricted cash at beginning of period		16	13
Cash, cash equivalents and restricted cash at end of period		26	15
Cash, cash equivalents and restricted cash at beginning of period		16
Cash, cash equivalents and restricted cash at end of period		26
Significant non-cash transactions:
Accrued capital expenditures		87	82
Duke Energy Indiana
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		106	(79)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		158	157
Equity component of AFUDC		(1)	(7)
Deferred income taxes		2	(81)
Impairment of assets and other charges			211
Payments for asset retirement obligations		(19)	(15)
(Increase) decrease in
Receivables		20	4
Receivables from affiliated companies		(26)	12
Inventory		(71)	(12)
Other current liabilities		112	14
Other current assets(a)	[4]	174	(22)
Increase (decrease) in
Accounts payable		(107)	19
Accounts payable to affiliated companies		(33)	(22)
Taxes accrued		14	74
Other assets	[4]	(12)	(10)
Other liabilities		35	50
Net cash provided by (used in) operating activities		352	293
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(226)	(212)
Purchases of debt and equity securities		(23)	(16)
Proceeds from sales and maturities of debt and equity securities		16	13
Notes receivable from affiliated companies		96	131
Other		(10)	(17)
Net cash used in investing activities		(147)	(101)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		495
Payments for the redemption of long-term debt		(300)	(53)
Notes payable to affiliated companies		(231)
Distributions to parent		(188)	(125)
Other		(1)	(1)
Net cash provided by financing activities		(225)	(179)
Net increase (decrease) in cash, cash equivalents and restricted cash		(20)	13
Cash, cash equivalents and restricted cash at beginning of period		31	6
Cash, cash equivalents and restricted cash at end of period		11	19
Cash, cash equivalents and restricted cash at beginning of period		31
Cash, cash equivalents and restricted cash at end of period		11
Significant non-cash transactions:
Accrued capital expenditures		85	82
Piedmont
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		232	214
Net loss attributable to Duke Energy		232	214
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		58	55
Equity component of AFUDC		(5)	(1)
Deferred income taxes		14	(11)
Impairment of assets and other charges		1
Equity in earnings of unconsolidated affiliates		(2)	(2)
Provision for rate refunds		0	(2)
(Increase) decrease in
Receivables		189	15
Receivables from affiliated companies			(2)
Inventory		73	58
Other current liabilities		42	36
Other current assets(a)		(19)	7
Increase (decrease) in
Accounts payable		(107)	(16)
Accounts payable to affiliated companies		(12)	12
Taxes accrued		(13)	16
Other assets		(2)	(13)
Other liabilities		(1)
Net cash provided by (used in) operating activities		448	366
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(271)	(199)
Other		(6)	(8)
Net cash used in investing activities		(277)	(207)
CASH FLOWS FROM FINANCING ACTIVITIES
Notes payable to affiliated companies		(171)	(158)
Other		0	(1)
Net cash provided by financing activities		(171)	(159)
Significant non-cash transactions:
Accrued capital expenditures		$ 160	$ 87

[1]Includes approximately $346 million of net collections of deferred fuel regulatory assets for the three months ended March 31, 2023.[2]Includes approximately $14 million of under-collected deferred fuel regulatory assets for the three months ended March 31, 2023[3]Includes approximately $162 million of net collections of deferred fuel regulatory assets for the three months ended March 31, 2023.[4]Includes approximately $175 million of net collections of deferred fuel regulatory assets for the three months ended March 31, 2023.

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Net collections of deferred fuel regulatory assets	$ 346
Duke Energy Carolinas
Net collections of deferred fuel regulatory assets	14
Progress Energy
Net collections of deferred fuel regulatory assets	139
Duke Energy Florida
Net collections of deferred fuel regulatory assets	162
Duke Energy Indiana
Net collections of deferred fuel regulatory assets	$ 175

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Millions		Total		Common Stockholders' Equity	Preferred Stock	Additional Paid In Capital	Retained Earnings	Net Gains (Losses) on Hedges	[1]	Net Unrealized Gains (Losses) on Available-for-Sale Securities	Pension and OPEB Adjustments	Noncontrolling Interests	Duke Energy Carolinas	Duke Energy Carolinas Members Equity	Duke Energy Carolinas Net Gains (Losses) on Cash Flow Hedges	Progress Energy	Progress Energy Common Stockholders' Equity	Progress Energy Additional Paid In Capital	Progress Energy Retained Earnings	Progress Energy Net Gains (Losses) on Cash Flow Hedges	Progress Energy Net Unrealized Gains (Losses) on Available-for-Sale Securities	Progress Energy Pension and OPEB Adjustments	Progress Energy Noncontrolling Interests	Duke Energy Progress	Duke Energy Progress Members Equity	Duke Energy Florida	Duke Energy Florida Members Equity	Duke Energy Florida Net Unrealized Gains (Losses) on Available-for-Sale Securities	Duke Energy Ohio	Duke Energy Ohio Common Stock	Duke Energy Ohio Additional Paid In Capital	Duke Energy Ohio Retained Earnings	Duke Energy Indiana	Duke Energy Indiana Members Equity	Duke Energy Indiana Pension and OPEB Adjustments	Piedmont	Piedmont Common Stockholders' Equity	Piedmont Common Stock	Piedmont Retained Earnings	Piedmont Noncontrolling Interests	Common Stock	Common Stock Common Stockholders' Equity	Common Stock Common Stock	Common Stock Additional Paid In Capital
Beginning Balance (parent) at Dec. 31, 2021		$ 51,136														$ 17,148	$ 17,145	$ 9,149	$ 8,007	$ (2)	$ (2)	$ (7)	$ 3													$ 3,349
Beginning Members' Equity at Dec. 31, 2021													$ 13,891	$ 13,897	$ (6)										$ 9,551	$ 8,295	$ 8,298	$ (3)					$ 5,015	$ 5,015
Beginning Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2021												$ 1,840																												$ 0
Beginning Balance (Attributable to Parent) at Dec. 31, 2021				$ 49,296	$ 1,962	$ 44,371	$ 3,265	$ (232)		$ (2)	$ (69)																		$ 4,464	$ 762	$ 3,100	$ 602					$ 3,349	$ 1,635	$ 1,714				$ 1
Balance (in shares) at Dec. 31, 2021																																											769,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		781		818			818					(37)
Net income		820														354	354		354																	214	214		214
Net income (loss)		857											340	340										$ 215	215	171	171		77			77	(79)	(79)		214
Other comprehensive (loss) income		107	[2]	99				110		(13)	2	8				(1)	(1)			1	(2)					(1)		(1)
Common stock issuances, including dividend reinvestment and employee benefits																																									$ (7)	$ (7)		$ (7)
Common stock issuances, including dividend reinvestment and employee benefits (in shares)																																											1,000,000
Common stock dividends		(760)		(760)			(760)						(50)	(50)		(250)	(250)		(250)						(250)								(113)	(113)
Contribution from noncontrolling interest, net of transaction costs(a)	[3]	23										23
Distributions to noncontrolling interest in subsidiaries		(28)										(28)				(1)							(1)
Equitization of certain notes payable to affiliates																2,431	2,431		2,431
Other													1	1		1	1		1						1				1			1	1	1
Ending Balance (parent) at Mar. 31, 2022		51,252														19,682	19,680	9,149	10,543	(1)	(4)	(7)	$ 2													3,563
Ending Balance (Attributable to Parent) at Mar. 31, 2022				49,446	1,962	44,364	3,323	(122)		(15)	(67)																		4,542	762	3,100	680					3,563	1,635	1,928				$ 1
Ending Balance (Attributable to Noncontrolling Interest) at Mar. 31, 2022												1,806																												0
Ending Member's Equity at Mar. 31, 2022													14,182	14,188	(6)										9,517	8,465	8,469	(4)					4,824	4,824
Balance (in shares) at Mar. 31, 2022																																											770,000,000
Beginning Balance (parent) at Dec. 31, 2022		51,853														$ 21,406	21,406	11,832	9,585	(1)	(8)	(2)							4,766							3,673
Beginning Members' Equity at Dec. 31, 2022													15,442	15,448	(6)									10,309	10,309	9,023	9,031	(8)					4,703	4,702	$ 1
Beginning Balance (Attributable to Noncontrolling Interest) at Dec. 31, 2022		2,531										2,531																								1				1
Beginning Balance (Attributable to Parent) at Dec. 31, 2022		$ 49,322		49,322	1,962	44,862	2,637	(29)		(23)	(88)																		$ 4,766	762	3,100	904				$ 3,672	3,672	1,635	2,037				$ 1
Balance (in shares) at Dec. 31, 2022		770,000,000														100													90,000,000							100,000,000							770,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		$ 722		765			765					(43)
Net income		761														$ 359	359		359																	$ 232	232		232
Net income (loss)		804											272	272										169	169	205	205		$ 100			100	106	106		232
Other comprehensive (loss) income		(26)	[2]	(26)				(31)		6	(1)					2	2				2					2		2
Common stock issuances, including dividend reinvestment and employee benefits																																									$ (10)	$ (10)		$ (10)
Common stock issuances, including dividend reinvestment and employee benefits (in shares)																																											1,000,000
Common stock dividends		(776)		(776)			(776)																										(75)	(75)
Sale of noncontrolling interest		(3)		(13)		(13)						10
Contribution from noncontrolling interest, net of transaction costs(a)	[3]	206										206
Distributions to noncontrolling interest in subsidiaries		(13)										(13)
Other		(2)		(2)		(2)										(2)	(2)	(2)								1	1
Ending Balance (parent) at Mar. 31, 2023		51,951														$ 21,765	$ 21,765	$ 11,830	$ 9,944	$ (1)	$ (6)	$ (2)							4,866							3,905
Ending Balance (Attributable to Parent) at Mar. 31, 2023		49,260		$ 49,260	$ 1,962	$ 44,837	$ 2,626	$ (60)		$ (17)	$ (89)																		$ 4,866	$ 762	$ 3,100	$ 1,004				3,904	$ 3,904	$ 1,635	$ 2,269				$ 1
Ending Balance (Attributable to Noncontrolling Interest) at Mar. 31, 2023		$ 2,691										$ 2,691																								$ 1				$ 1
Ending Member's Equity at Mar. 31, 2023													$ 15,714	$ 15,720	$ (6)									$ 10,478	$ 10,478	$ 9,231	$ 9,237	$ (6)					$ 4,734	$ 4,733	$ 1
Balance (in shares) at Mar. 31, 2023		771,000,000														100													90,000,000							100,000,000							771,000,000

[1]See Duke Energy Condensed Consolidated Statements of Comprehensive Income for detailed activity related to Cash Flow and Fair Value hedges.[2]Net of income tax benefit of approximately $8 million and income tax expense of approximately $32 million for the three months ended March 31, 2023, and 2022, respectfully.[3]Relates primarily to tax equity financing activity in the Commercial Renewables segment.

Organization and Basis of Prese

Organization and Basis of Presentation	3 Months Ended
Organization and Basis of Presentation	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	ORGANIZATION AND BASIS OF PRESENTATION BASIS OF PRESENTATION These Condensed Consolidated Financial Statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Regulation S-X. Accordingly, these Condensed Consolidated Financial Statements do not include all information and notes required by GAAP for annual financial statements and should be read in conjunction with the Consolidated Financial Statements in the Duke Energy's Annual Report on Form 10-K for the year ended December 31, 2022. The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Condensed Consolidated Financial Statements. However, none of the registrants make any representations as to information related solely to Duke Energy or the subsidiaries of Duke Energy other than itself. These Condensed Consolidated Financial Statements, in the opinion of the respective companies’ management, reflect all normal recurring adjustments necessary to fairly present the financial position and results of operations of each of the Duke Energy Registrants. Amounts reported in Duke Energy’s interim Condensed Consolidated Statements of Operations and each of the Subsidiary Registrants’ interim Condensed Consolidated Statements of Operations and Comprehensive Income are not necessarily indicative of amounts expected for the respective annual periods due to effects of seasonal temperature variations on energy consumption, regulatory rulings, timing of maintenance on electric generating units, changes in mark-to-market valuations, changing commodity prices and other factors. In preparing financial statements that conform to GAAP, management must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. BASIS OF CONSOLIDATION These Condensed Consolidated Financial Statements include, after eliminating intercompany transactions and balances, the accounts of the Duke Energy Registrants and subsidiaries or VIEs where the respective Duke Energy Registrants have control. See Note 12 for additional information on VIEs. These Condensed Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities. Discontinued Operations Duke Energy has elected to present cash flows of discontinued operations combined with cash flows of continuing operations. Unless otherwise noted, the notes to these condensed consolidated financial statements exclude amounts related to discontinued operations for all periods presented. For the three months ended March 31, 2023, and 2022, the Loss From Discontinued Operations, net of tax on Duke Energy's Condensed Consolidated Statements of Operations includes amounts related to noncontrolling interests. A portion of Noncontrolling interests on Duke Energy's Condensed Consolidated Balance Sheets relates to discontinued operations for the periods presented. See Note 2 for discussion of discontinued operations related to the Commercial Renewables Disposal Groups. NONCONTROLLING INTEREST Duke Energy maintains a controlling financial interest in certain less than wholly owned nonregulated subsidiaries. As a result, Duke Energy consolidates these subsidiaries and presents the third-party investors' portion of Duke Energy's net income (loss), net assets and comprehensive income (loss) as noncontrolling interest. Noncontrolling interest is included as a component of equity on the Condensed Consolidated Balance Sheets. Operating agreements of Duke Energy's subsidiaries with noncontrolling interest allocate profit and loss based on their pro rata shares of the ownership interest in the respective subsidiary. Therefore, Duke Energy allocates net income or loss and other comprehensive income or loss of these subsidiaries to the owners based on their pro rata shares. CASH, CASH EQUIVALENTS AND RESTRICTED CASH Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. See Notes 10 and 12 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Condensed Consolidated Balance Sheets. The following table presents the components of cash, cash equivalents and restricted cash included in the Condensed Consolidated Balance Sheets. March 31, 2023 December 31, 2022 Duke Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Duke Energy Progress Energy Energy Energy Carolinas Energy Progress Florida Energy (a) Carolinas Energy Progress Florida Current Assets Cash and cash equivalents $ 451 $ 24 $ 93 $ 50 $ 26 $ 409 $ 44 $ 108 $ 49 $ 45 Other 42 5 37 14 18 82 8 74 28 41 Other Noncurrent Assets Other 11 1 4 4 — 11 1 2 2 — Total cash, cash equivalents and restricted cash $ 504 $ 30 $ 134 $ 68 $ 44 $ 502 $ 53 $ 184 $ 79 $ 86 (a) Certain prior year balances have been adjusted for held for sale presentation. See Note 2 for additional information. INVENTORY Provisions for inventory write-offs were not material at March 31, 2023, and December 31, 2022. The components of inventory are presented in the tables below. March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Materials and supplies $ 2,739 $ 948 $ 1,273 $ 842 $ 431 $ 116 $ 355 $ 12 Coal 772 309 233 128 105 29 202 — Natural gas, oil and other fuel 354 46 206 112 94 12 3 87 Total inventory $ 3,865 $ 1,303 $ 1,712 $ 1,082 $ 630 $ 157 $ 560 $ 99 December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Materials and supplies $ 2,604 $ 876 $ 1,232 $ 819 $ 413 $ 105 $ 342 $ 12 Coal 620 253 190 99 91 34 144 — Natural gas, oil and other fuel 360 35 157 88 69 5 3 160 Total inventory $ 3,584 $ 1,164 $ 1,579 $ 1,006 $ 573 $ 144 $ 489 $ 172 OTHER NONCURRENT ASSETS Duke Energy, through a nonregulated subsidiary, was the winner of the Carolina Long Bay offshore wind auction in May 2022 and recorded an asset of $150 million related to the arrangement in Other within Other noncurrent assets. In November 2022, Duke Energy committed to a plan to sell the Commercial Renewables business segment, excluding the offshore wind contract for Carolina Long Bay, which was moved to the Electric Utilities and Infrastructure (EU&I) segment. See Notes 2 and 3 for further information. ACCOUNTS PAYABLE Duke Energy maintains a supply chain finance program (the “program”) with a global financial institution. The program is voluntary and allows Duke Energy suppliers, at their sole discretion, to sell their receivables from Duke Energy to the financial institution at a rate that leverages Duke Energy’s credit rating and which may result in favorable terms compared to the rate available to the supplier on their own credit rating. Suppliers participating in the program determine at their sole discretion which invoices they will sell to the financial institution. Duke Energy confirms invoices sold by suppliers under the program to the financial institution and pays the financial institution based on commercial terms negotiated between Duke Energy and the supplier regardless of program participation. Suppliers’ decisions on which invoices are sold do not impact Duke Energy’s payment terms. The commercial terms negotiated between Duke Energy and its suppliers are consistent regardless of whether the supplier elects to participate in the program. Duke Energy does not issue any guarantees with respect to the program and does not participate in negotiations between suppliers and the financial institution. Duke Energy does not have an economic interest in the supplier’s decision to participate in the program and receives no interest, fees or other benefit from the financial institution based on supplier participation in the program. The following table represents the changes in confirmed obligations outstanding for the three months ended March 31, 2023, and 2022. Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Confirmed obligations outstanding at the December 31, 2021 $ 19 $ — $ 9 $ — $ 9 $ 6 $ — $ 4 Invoices confirmed during the period 31 2 11 2 9 6 2 11 Confirmed invoices paid during the period (31) (1) (11) (1) (10) (8) (1) (10) Confirmed obligations outstanding at March 31, 2022 $ 19 $ 1 $ 9 $ 1 $ 8 $ 4 $ 1 $ 5 Confirmed obligations outstanding at the December 31, 2022 $ 87 $ 6 $ 19 $ 8 $ 11 $ 5 $ — $ 57 Invoices confirmed during the period 59 10 22 11 11 1 — 25 Confirmed invoices paid during the period (94) (9) (26) (13) (13) (6) — (53) Confirmed obligations outstanding at March 31, 2023 $ 52 $ 7 $ 15 $ 6 $ 9 $ — $ — $ 29 NEW ACCOUNTING STANDARDS No new accounting standards were adopted by the Duke Energy Registrants in 2023.

Dispositions

Dispositions	3 Months Ended
Dispositions	Mar. 31, 2023
Discontinued Operations and Disposal Groups [Abstract]
Dispositions	DISPOSITIONS Sale of Commercial Renewables Segment In August 2022, Duke Energy announced a strategic review of its commercial renewables business. Since 2007, Duke Energy has built a portfolio of commercial wind, solar and battery projects across the U.S., and established a development pipeline. Duke Energy has developed a strategy to focus on renewables, grid and other investment opportunities within its regulated operations. In November 2022, Duke Energy committed to a plan to sell the Commercial Renewables business segment, excluding the offshore wind contract for Carolina Long Bay, which was moved to the EU&I segment. Prior to March 2023, Duke Energy was actively marketing the Commercial Renewables business as two separate disposal groups, the utility-scale solar and wind group and the distributed generation group. In March 2023, assets for certain projects were removed from the utility-scale solar and wind group and placed in a separate disposal group (collectively, Commercial Renewables Disposal Groups) and a pretax impairment of approximately $220 million was recorded for the three months ended March 31, 2023. The sales processes for the Commercial Renewables Disposal Groups are ongoing and Duke Energy expects to dispose of these groups in the second half of 2023. Assets Held For Sale and Discontinued Operations The Commercial Renewables Disposal Groups were classified as held for sale and as discontinued operations in the fourth quarter of 2022. Originally debt and the related restricted cash and interest rate swaps were not expected to transfer to a buyer but during the marketing process it was determined they would be included with the sale and were classified as held for sale in March 2023. As a result, adjustments were made to the December 31, 2022, Consolidated Balance Sheet to present debt and the related restricted cash and interest rate swaps as held for sale. No adjustments were made to the historical activity within the Consolidated Statements of Comprehensive Income, Consolidated Statements of Cash Flows or the Consolidated Statements of Changes in Equity. Unless otherwise noted, the notes to these consolidated financial statements exclude amounts related to discontinued operations for all periods presented. No interest from corporate level debt was allocated to discontinued operations. The following table presents the carrying values of the major classes of Assets held for sale and Liabilities associated with assets held for sale included in Duke Energy's Consolidated Balance Sheets. (in millions) March 31, 2023 December 31, 2022 Current Assets Held for Sale Cash and cash equivalents $ 12 $ 10 Receivables, net 114 107 Inventory 81 88 Other 167 151 Total current assets held for sale 374 356 Noncurrent Assets Held for Sale Property, Plant and Equipment Cost 6,334 6,444 Accumulated depreciation and amortization (1,651) (1,651) Net property, plant and equipment 4,683 4,793 Operating lease right-of-use assets, net 142 140 Investments in equity method unconsolidated affiliates 512 522 Other 201 179 Total other noncurrent assets held for sale 855 841 Total Assets Held for Sale $ 5,912 $ 5,990 Current Liabilities Associated with Assets Held for Sale Accounts payable $ 80 $ 122 Taxes accrued 9 17 Current maturities of long-term debt 275 276 Other 112 120 Total current liabilities associated with assets held for sale 476 535 Noncurrent Liabilities Associated with Assets Held for Sale Long-Term debt 1,184 1,188 Operating lease liabilities 150 150 Asset retirement obligations 196 190 Other 401 399 Total other noncurrent liabilities associated with assets held for sale 1,931 1,927 Total Liabilities Associated with Assets Held for Sale $ 2,407 $ 2,462 As of March 31, 2023, and December 31, 2022, the noncontrolling interest balance is $1.7 billion and $1.6 billion, respectively. The following table presents the results of the Commercial Renewables Disposal Groups, which are included in Loss from Discontinued Operations, net of tax in Duke Energy's Consolidated Statements of Operations. Three Months Ended March 31, (in millions) 2023 2022 Operating revenues $ 80 $ 121 Operation, maintenance and other 89 81 Depreciation and amortization (a) — 64 Property and other taxes 10 10 Other income and expenses, net (4) — Interest expense 31 19 Loss on disposal 220 — Loss before income taxes (274) (53) Income tax benefit (65) (38) Loss from discontinued operations $ (209) $ (15) Add: Net loss attributable to noncontrolling interest included in discontinued operations 64 27 Net income from discontinued operations attributable to Duke Energy Corporation $ (145) $ 12 (a) Upon meeting the criteria for assets held for sale, beginning in November 2022 depreciation and amortization expense were ceased. The Commercial Renewables Disposal Groups' held for sale assets included pretax impairments of approximately $1.7 billion at December 31, 2022. In the first quarter of 2023, a pretax impairment of approximately $220 million was recorded to write-down the carrying amount of property, plant and equipment assets to the estimated fair value of the business, based on the expected selling price less estimated costs to sell. The first quarter impairment was included in Loss from Discontinued Operations, net of tax, in Duke Energy's Condensed Consolidated Statements of Operations and Comprehensive Income for the three months ended March 31, 2023. The fair value was primarily determined from market information obtained through the bidding process and discounted cash flow analysis. The discounted cash flow model utilized Level 2 and Level 3 inputs. The fair value hierarchy levels are further discussed in Note 11. The impairment will be updated, if necessary, based on market changes or the final sales price, including all closing adjustments. Duke Energy has elected not to separately disclose discontinued operations on Duke Energy's Consolidated Statements of Cash Flows. The following table summarizes Duke Energy's cash flows from discontinued operations related to the Commercial Renewables Disposal Groups. Three Months Ended March 31, (in millions) 2023 2022 Cash flows provided by (used in): Operating activities $ (54) $ 64 Investing activities (151) (88) Other Sale-Related Matters Duke Energy (Parent) and several Duke Energy renewables project companies, located in the ERCOT market, were named in several lawsuits arising out of Texas Storm Uri, which occurred in February 2021. The legal actions related to Duke Energy (Parent) from these lawsuits will remain with Duke Energy (Parent) and any future activity related to Duke Energy (Parent) as a defendant in these lawsuits will be presented in discontinued operations. See Note 4 for more information.

Business Segments

Business Segments	3 Months Ended
Business Segments	Mar. 31, 2023
Segment Reporting [Abstract]
Business Segments	BUSINESS SEGMENTS Duke Energy Due to Duke Energy's commitment in the fourth quarter of 2022 to sell the Commercial Renewables business segment, Duke Energy's segment structure now includes the following two segments: EU&I and GU&I. Prior period information has been recast to conform to the current segment structure. See Note 2 for further information on the Commercial Renewables Disposal Groups. The EU&I segment primarily includes Duke Energy's regulated electric utilities in the Carolinas, Florida and the Midwest. EU&I also includes Duke Energy's electric transmission infrastructure investments and the offshore wind contract for Carolina Long Bay. Refer to Note 2 for further information. The GU&I segment includes Piedmont, Duke Energy's natural gas local distribution companies in Ohio and Kentucky and Duke Energy's natural gas storage, midstream pipeline and renewable natural gas investments. The remainder of Duke Energy’s operations is presented as Other, which is primarily comprised of interest expense on holding company debt, unallocated corporate costs, Duke Energy’s wholly owned captive insurance company, Bison, and Duke Energy's ownership interest in National Methanol Company. Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets. Three Months Ended March 31, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 6,381 $ 888 $ 7,269 $ 7 $ — $ 7,276 Intersegment revenues 17 23 40 24 (64) — Total revenues $ 6,398 $ 911 $ 7,309 $ 31 $ (64) $ 7,276 Segment income (loss) $ 791 $ 287 $ 1,078 $ (168) $ — $ 910 Less: Noncontrolling interests 43 Add: Preferred stock dividend 39 Discontinued operations (145) Net Income $ 761 Segment assets (a) $ 152,989 $ 16,217 $ 169,206 $ 9,627 $ — $ 178,833 Three Months Ended March 31, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 5,995 $ 1,009 $ 7,004 $ 7 $ — $ 7,011 Intersegment revenues 7 23 30 23 (53) — Total revenues $ 6,002 $ 1,032 $ 7,034 $ 30 $ (53) $ 7,011 Segment income (loss) (b) $ 723 $ 254 $ 977 $ (171) $ — $ 806 Less: Noncontrolling interests 37 Add: Preferred stock dividend 39 Discontinued operations 12 Net Income $ 820 (a) Other includes Assets Held for Sale balances related to the Commercial Renewables Disposal Groups. Refer to Note 2 for further information. (b) EU&I includes $211 million recorded within Impairment of assets and other charges, $46 million within Operating revenues and $22 million within Noncontrolling Interests related to the Duke Energy Indiana Supreme Court ruling on the Condensed Consolidated Statements of Operations. See Note 4 for additional information. Duke Energy Ohio Duke Energy Ohio has two reportable segments, EU&I and GU&I. The remainder of Duke Energy Ohio's operations is presented as Other. Three Months Ended March 31, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 474 $ 235 $ 709 $ — $ — $ 709 Segment income (loss)/Net income $ 49 $ 52 $ 101 $ (1) $ — $ 100 Segment assets $ 7,553 $ 4,041 $ 11,594 $ 10 $ 89 $ 11,693 Three Months Ended March 31, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 412 $ 226 $ 638 $ — $ 638 Segment income (loss)/Net income $ 41 $ 38 $ 79 $ (2) $ 77

Regulatory Matters

Regulatory Matters	3 Months Ended
Regulatory Matters	Mar. 31, 2023
Regulated Operations [Abstract]
Regulatory Matters	REGULATORY MATTERS RATE-RELATED INFORMATION The NCUC, PSCSC, FPSC, IURC, PUCO, TPUC and KPSC approve rates for retail electric and natural gas services within their states. The FERC approves rates for electric sales to wholesale customers served under cost-based rates (excluding Ohio and Indiana), as well as sales of transmission service. The FERC also regulates certification and siting of new interstate natural gas pipeline projects. Duke Energy Carolinas and Duke Energy Progress Nuclear Statio n Subsequent License Renewal On June 7, 2021, Duke Energy Carolinas filed a subsequent license renewal (SLR) application for the Oconee Nuclear Station (ONS) with the U.S. Nuclear Regulatory Commission (NRC) to renew ONS’s operating license for an additional 20 years. The SLR would extend operations of the facility from 60 to 80 years. The current licenses for units 1 and 2 expire in 2033 and the license for unit 3 expires in 2034. By a Federal Register Notice dated July 28, 2021, the NRC provided a 60-day comment period for persons whose interest may be affected by the issuance of a subsequent renewed license for ONS to file a request for a hearing and a petition for leave to intervene. On September 27, 2021, Beyond Nuclear and Sierra Club (Petitioners) filed a Hearing Request and Petition to Intervene (Hearing Request) and a Petition for Waiver. The Hearing Request proposed three contentions and claimed that Duke Energy Carolinas did not satisfy the National Environmental Policy Act (NEPA) of 1969, as amended, or the NRC’s NEPA-implementing regulations. Following Duke Energy Carolinas' answer and the Petitioners' reply, on February 11, 2022, the Atomic Safety and Licensing Board (ASLB) issued its decision on the Hearing Request and found that the Petitioners failed to establish that the proposed contentions are litigable. The ASLB also denied the Petitioners' Petition for Waiver and terminated the proceeding. On February 24, 2022, the NRC issued a decision in the SLR appeal related to Florida Power and Light's Turkey Point nuclear generating station in Florida. The NRC ruled that the NRC’s license renewal Generic Environmental Impact Statement (GEIS) does not apply to SLR because the GEIS does not address SLR. The decision overturned a 2020 NRC decision that found the GEIS applies to SLR. Although Turkey Point is not owned or operated by a Duke Energy Registrant, the NRC’s order applies to all SLR applicants, including ONS. The NRC order also indicated no subsequent renewed licenses will be issued until the NRC staff has completed an adequate NEPA review for each application. On April 5, 2022, the NRC approved a 24-month rulemaking plan that will enable the NRC staff to complete an adequate NEPA review. Although an SLR applicant may wait until the rulemaking is completed, the NRC also noted that an applicant may submit a supplement to its environmental report providing information on environmental impacts during the SLR period prior to the rulemaking being completed. On November 7, 2022, Duke Energy Carolinas submitted a supplement to its environmental report addressing environmental impacts during the SLR period. On December 19, 2022, the NRC published a notice in the Federal Register that the NRC will conduct a limited scoping process to gather additional information necessary to prepare an environmental impact statement (EIS) to evaluate the environmental impacts at ONS during the SLR period. The NRC received comments from the EPA and the Petitioners and these comments identify 18 potential impacts that should be considered by the NRC in the EIS, which include, but are not limited to, climate change and flooding, environmental justice, severe accidents, and external events. Currently, the NRC expects to publish a draft EIS in October 2023. On December 19, 2022, the NRC issued the Safety Evaluation Report (SER) for the safety portion of the SLR application. The NRC determined Duke Energy Carolinas met the requirements of the applicable regulations and identified actions that have been taken or will be taken to manage the effects of aging and address time-limited analyses. Duke Energy Carolinas and the NRC met with the Advisory Committee on Reactor Safeguards (ACR S) on February 2, 2023, to discuss issues regarding the SER and SLR application. On February 25, 2023, the ACRS issued a report to the NRC on the safety aspects of the ONS SLR application, which concluded that the established programs and commitments made by Duke Energy Carolinas to manage age-related degradation provide confidence that ONS can be operated in accordance with its current licensing basis for the subsequent period of extended operation without undue risk to the health and safety of the public and the SLR application for ONS should be approved. Although the NRC’s GEIS applicability decision will delay completion of the SLR proceeding, Duke Energy Carolinas does not believe it changes the probability that the ONS subsequent renewed licenses will ultimately be issued, although Duke Energy Carolinas cannot guarantee the outcome of the license application process. Duke Energy Carolinas and Duke Energy Progress intend to seek renewal of operating licenses and 20-year license extensions for all of their nuclear stations. New depreciation rates were implemented for all of the nuclear facilities during the second quarter of 2021. Duke Energy Carolinas and Duke Energy Progress cannot predict the outcome of these additional relicensing proceedings. Storm Cost Securitization On June 15, 2022, the South Carolina General Assembly unanimously adopted S. 1077 (Act 227) in both the House and Senate and the bill was signed into law on June 17, 2022. The legislation enables the PSCSC to permit the issuance of bonds for the payment of storm costs and the creation of a storm charge for repayment. On August 5, 2022, Duke Energy Progress filed a petition with the PSCSC for review and approval of deferred storm costs to be securitized of approximately $223 million. On February 7, 2023, a stipulation was reached with all parties in the proceeding regarding certain items identified through the Office of Regulatory Staff (ORS) audit of storm costs. The evidentiary hearing was held on March 1, 2023. On April 20, 2023, the PSCSC issued its order, approving the stipulation and determining unresolved issues in the case, resulting in approximately $171 million in projected deferred storm costs eligible to be securitized. The difference in the original filed amount and the approved amount is primarily related to the stipulation with the ORS in which Duke Energy Progress agreed to apply a debt-only rate of return for the calculation of carrying costs during the deferral period for the deferred storm costs. Duke Energy Carolinas 2023 North Carolina Rate Case On January 19, 2023, Duke Energy Carolinas filed a PBR application with the NCUC to request an increase in base rate retail revenues. The PBR Application includes an MYRP to recover projected capital investments during the three Duke Energy Carolinas cannot predict the outcome of this matter. Duke Energy Progress 2022 North Carolina Rate Case On October 6, 2022, Duke Energy Progress filed a PBR application with the NCUC to request an increase in base rate retail revenues. The rate request before the NCUC includes an MYRP to recover projected capital investments during the three Duke Energy Progress plans to implement interim rates, subject to refund, in June 2023, and has requested permanent rates be effective by October 1, 2023. Testimony was filed by various parties on March 27, 2023, and Duke Energy Progress rebuttal testimony was filed on April 14, 2023. On April 26, 2023, Duke Energy Progress filed a partial settlement with Public Staff, which includes agreement on many aspects of Duke Energy Progress' three -year MYRP proposal. In May 2023, the Carolina Industrial Group for Fair Utility Rates II joined this partial settlement and the parties filed a separate settlement reaching agreement on PIMs, Tracking Metrics and the residential decoupling mechanism under the PBR Application. The settlement agreements are subject to the review and approval of the NCUC. Evidentiary hearings began on May 4, 2023. The key unsettled issues to be litigated in the hearing include the return on equity, capital structure, recovery of the COVID-19 cost deferral and treatment of certain regulatory asset and liability amortizations. Duke Energy Progress' proposed revenue requirement in the case as adjusted for supplemental updates and the partial settlement is $320 million in Year 1, $127 million in Year 2 and $140 million in Year 3, for a combined total of $587 million or 15% by late 2025. Duke Energy Progress cannot predict the outcome of this matter. 2022 South Carolina Rate Case On September 1, 2022, Duke Ener gy Progress filed an application with the PSCSC to request an increase in base rate retail revenues. On J anuary 12, 2023, Duke Energy Progress and the ORS, as well as other consumer, environmental, and industrial intervening parties, filed a comprehensive Agreement and Stipulation of Settlement resolving all issues in the base rate proceeding. The major components of the stipulation include: • A $52 million annual customer rate increase prior to the reduction from the accelerated return to customers of federal unprotected Property, Plant and Equipment related EDIT. After extending the remaining EDIT giveback to customers to 33 months, the net annual retail rate increase is approximately $36 million. • ROE of 9.6% based on a capital structure of 52.43% equity and 47.57% debt. • Continuation of deferral treatment of coal ash basin closure costs. Supports an amortization period for remaining coal ash closure costs in this rate case of seven years. Duke Energy Progress agreed not to seek recovery of approximately $50 million of deferred coal ash expenditures related to retired sites in this rate case (South Carolina retail allocation). • Accepts the 2021 Depreciation Study as proposed in this case, as adjusted for certain recommendations from ORS and includes accelerated retirement dates for certain coal units as originally proposed. • Establishment of a storm reserve to help offset the costs of major storms. Duke Energy Florida 2021 Settlement Agreement On January 14, 2021, Duke Energy Florida filed a Settlement Agreement (the “2021 Settlement”) with the FPSC. The parties to the 2021 Settlement include Duke Energy Florida, the Office of Public Counsel (OPC), the Florida Industrial Power Users Group, White Springs Agricultural Chemicals, Inc. d/b/a PCS Phosphate and NUCOR Steel Florida, Inc. (collectively, the “Parties”). Pursuant to the 2021 Settlement, the Parties agreed to a base rate stay-out provision that expires year-end 2024; however, Duke Energy Florida is allowed an increase to its base rates of an incremental $67 million in 2022, $49 million in 2023 and $79 million in 2024, subject to adjustment in the event of tax reform during the years 2021, 2022 and 2023. The Parties also agreed to an ROE band of 8.85% to 10.85% with a midpoint of 9.85% based on a capital structure of 53% equity and 47% debt. The ROE band can be increased by 25 basis points if the average 30-year U.S. Treasury rate increases 50 basis points or more over a six-month period in which case the midpoint ROE would rise from 9.85% to 10.10%. On July 25, 2022, this provision was triggered. Duke Energy Florida filed a petition with the FPSC on August 12, 2022, to increase the ROE effective August 2022 with a base rate increase effective January 1, 2023. The FPSC approved this request on October 4, 2022. The 2021 Settlement Agreement also provided that Duke Energy Florida will be able to retain $173 million of the expected Department of Energy (DOE) award from its lawsuit to recover spent nuclear fuel to mitigate customer rates over the term of the 2021 Settlement. In return, Duke Energy Florida is permitted to recognize the $173 million into earnings through the approved settlement period. Duke Energy Florida settled the DOE lawsuit and received payment of approximately $180 million on June 15, 2022, of which the retail portion was approximately $154 million. The 2021 Settlement authorizes Duke Energy Florida to collect the difference between $173 million and the $154 million retail portion of the amount received through the capacity cost recovery clause. As of March 31, 2023, Duke Energy Florida has recognized $54 million into earnings. The remaining $119 million is expected to be recognized over the remainder of 2023 and 2024, while also remaining within the approved return on equity band. The 2021 Settlement also contained a provision to recover or flow back the effects of tax law changes. As a result of the IRA enacted on August 16, 2022, Duke Energy Florida is eligible for PTCs associated with solar facilities placed in service beginning in January 2022. Duke Energy Florida filed a petition with the FPSC on October 17, 2022, to reduce base rates effective January 1, 2023, by $56 million to flow back the expected 2023 PTCs and to flow back the expected 2022 PTCs via an adjustment to the capacity cost recovery clause. On December 14, 2022, the FPSC issued an order approving Duke Energy Florida's petition. In addition to these terms, the 2021 Settlement contained provisions related to the accelerated depreciation of Crystal River Units 4-5, the approval of approximately $1 billion in future investments in new cost-effective solar power, the implementation of a new Electric Vehicle Charging Station Program and the deferral and recovery of costs in connection with the implementation of Duke Energy Florida’s Vision Florida program, which explores various emerging non-carbon emitting generation technology, distributed technologies and resiliency projects, among other things. The 2021 Settlement also resolved remaining unrecovered storm costs for Hurricane Michael and Hurricane Dorian. The FPSC approved the 2021 Settlement on May 4, 2021, issuing an order on June 4, 2021. Revised customer rates became effective January 1, 2022, with subsequent base rate increases effective January 1, 2023, and January 1, 2024. Clean Energy Connection On July 1, 2020, Duke Energy Florida petitioned the FPSC for approval of a voluntary solar program. The program consists of 10 new solar generating facilities with combined capacity of approximately 750 MW. The program allows participants to support cost-effective solar development in Florida by paying a subscription fee based on per kilowatt subscriptions and receiving a credit on their bill based on the actual generation associated with their portion of the solar portfolio. The estimated cost of the 10 new solar generation facilities is approximately $1 billion and the projects are expected to be completed by the end of 2024. This investment will be included in base rates offset by the revenue from the subscription fees and the credits will be included for recovery in the fuel cost recovery clause. The FPSC approved the program in January 2021. On February 24, 2021, the League of United Latin American Citizens (LULAC) filed a notice of appeal of the FPSC’s order approving the Clean Energy Connection to the Supreme Court of Florida. The Supreme Court of Florida heard oral arguments in the appeal on February 9, 2022. On May 27, 2022, the Supreme Court of Florida issued an order remanding the case to the FPSC so that the FPSC can amend its order to better address some of the arguments raised by LULAC. On September 23, 2022, the FPSC issued a revised order and submitted it on September 26, 2022, to the Supreme Court of Florida. The Supreme Court of Florida requested that the parties file supplemental briefs regarding the revised order, which were filed February 6, 2023. LULAC has filed a request for Oral Argument on the issues discussed in the supplemental briefs, but the Court has yet to rule on that request. The FPSC approval order remains in effect pending the outcome of the appeal. Duke Energy Florida cannot predict the outcome of this matter. Storm Protection Plan On April 11, 2022, Duke Energy Florida filed a Storm Protection Plan for approval with the FPSC. The plan, which covers investments for the 2023-2032 time frame, reflects approxim ately $7 billion of capital inv estment in transmission and distribution meant to strengthen its infrastructure, reduce outage times associated with extreme weather events, reduce restoration costs and improve ove rall service reliability. The evidentiary hearing began on August 2, 2022. On October 4, 2022, the FPSC voted to approve Duke Energy Florida’s plan with one modification to remove the transmission loop radially fed program, representing a reduction of approximately $80 million over the 10-year period starting in 2025. On December 9, 2022, the Office of Public Counsel filed a notice of appeal of this order to the Florida Supreme Court. The Office of Public Counsel’s initial brief was filed on April 18, 2023. Duke Energy Florida cannot predict the outcome of this matter. Hurricane Ian On September 28, 2022, much of Duke Energy Florida’s service territory was impacted by Hurricane Ian, which caused significant damage resulting in more than 1.1 million outages. Duke Energy Florida's March 31, 2023 Duke Energy Ohio Duke Energy Ohio Electric Base Rate Case Duke Energy Ohio filed with the PUCO an electric distribution base rate case application on October 1, 2021, with supporting testimony filed on October 15, 2021, requesting an increase in electric distribution base rates of approximately $55 million and an ROE of 10.3%. On September 19, 2022, Duke Energy Ohio filed a Stipulation and Recommendation with the PUCO, which includes an increase in overall electric distribution base rates of approximately $23 million and an ROE of 9.5%. The stipulation is among all but one party to the proceeding. The PUCO issued an order on December 14, 2022, approving the Stipulation without material modification. Rates went into effect on January 3, 2023. The Ohio Consumers' Counsel (OCC) filed an application for rehearing on January 13, 2023. On February 8, 2023, the Commission granted the OCC's application for rehearing for further consideration. Duke Energy Ohio cannot predict the outcome of this matter. Energy Efficiency Cost Recovery In response to changes in Ohio law that eliminated Ohio's energy efficiency mandates, the PUCO issued an order on February 26, 2020, directing utilities to wind down their demand-side management programs by September 30, 2020, and to terminate the programs by December 31, 2020. Duke Energy Ohio took the following actions: • On March 27, 2020, Duke Energy Ohio filed an application for rehearing seeking clarification on the final true up and reconciliation process after 2020. On November 18, 2020, the PUCO issued an order replacing the cost cap previously imposed upon Duke Energy Ohio with a cap on shared savings recovery. On December 18, 2020, Duke Energy Ohio filed an additional application for rehearing challenging, among other things, the imposition of the cap on shared savings. On January 13, 2021, the application for rehearing was granted for further consideration. • On October 9, 2020, Duke Energy Ohio filed an application to implement a voluntary energy efficiency program portfolio to commence on January 1, 2021. The application proposed a mechanism for recovery of program costs and a benefit associated with avoided transmission and distribution costs. This application remains under review. • On November 18, 2020, the PUCO issued an order directing all utilities to set their energy efficiency riders to zero effective January 1, 2021, and to file a separate application for final reconciliation of all energy efficiency costs prior to December 31, 2020. Effective January 1, 2021, Duke Energy Ohio suspended its energy efficiency programs. • On June 14, 2021, the PUCO requested each utility to file by July 15, 2021, a proposal to reestablish low-income programs through December 31, 2021. Duke Energy Ohio filed its application on July 14, 2021. • On February 23, 2022, the PUCO issued its Fifth Entry on Rehearing that 1) affirmed its reduction in Duke Energy Ohio's shared savings cap; 2) denied rehearing/clarification regarding lost distribution revenues and shared savings recovery for periods after December 31, 2020; and 3) directed Duke Energy Ohio to submit an updated application with exhibits. On March 25, 2022, Duke Energy Ohio filed its Amended Application consistent with the PUCO's order. • On March 17, 2023, the Staff of the Public Utilities Commission of Ohio submitted its Staff Review and Recommendation. This Staff Report, like prior such reports, recommends certain disallowances related to incentives. • On March 27, 2023, the Commission established a procedural sche dule. Intervention/comments were filed on April 26, 2023, an d reply comments are due by May 11, 2023. Duke Energy Ohio cannot predict the outcome of this matter. Duke Energy Ohio Natural Gas Base Rate Case Duke Energy Ohio filed with the PUCO a natural gas base rate case application on June 30, 2022, with supporting testimony filed on July 14, 2022, requesting an increase in natural gas base rates of approximately $49 million and an ROE of 10.3%. This is an approximate 5.6% average increase in the customer's total bill across all customer classes. The drivers for this case are capital invested since Duke Energy Ohio's last natural gas base rate case in 2012. Duke Energy Ohio is also seeking to adjust the caps on its CEP Rider. The Staff of the PUCO (Staff) report was issued on December 21, 2022, recommending an increase in natural gas base rates of $24 million to $36 million, with an equity ratio of 52.32% and an ROE range of 9.03% to 10.04%. On April 28, 2023, Duke Energy Ohio filed a stipulation with all parties to the case except the OCC. In the stipulation, the parties agreed to approximately $32 million in revenue increases with an equity ratio of 52.32% and an ROE of 9.6%, and adjustments to the CEP Rider caps. The evidentiary hearing is scheduled to begin on May 23, 2023. Duke Energy Ohio cannot predict the outcome of this matter. Duke Energy Kentucky Electric Base Rate Case On December 1, 2022, Duke Energy Kentucky filed a rate case with the KPSC requesting an annualized increase in electric base rates of approximately $75 million and an ROE of 10.35%. This is an overall increase in rates of approximately 17.8%. The request for rate increase is driven by capital investments to strengthen the electricity generation and delivery systems along with adjusted depreciation rates for the East Bend and Woodsdale generation stations to support the energy transition. Duke Energy Kentucky is also requesting new programs and tariff updates, including a voluntary community-based renewable subscription program and two EV charging programs. Intervenor testimony was filed March 10, 2023, and rebuttal testimony was filed April 14, 2023. The Kentucky Attorney General recommended an increase of $31 million and an ROE of 9.55%. An evidentiary hearing will begin May 9, 2023. New rates are anticipated to go into effect around July 15, 2023. Duke Energy Kentucky cannot predict the outcome of this matter. Duke Energy Indiana 2019 Indiana Rate Case On July 2, 2019, Duke Energy Indiana filed a general rate case with the IURC for a rate increase for retail customers of approximately $395 million. The rebuttal case, filed on December 4, 2019, updated the requested revenue requirement to result in a 15.6% or $396 million average retail rate increase, including the impacts of the utility receipts tax. On June 29, 2020, the IURC issued an order in the rate case approving a revenue increase of $146 million before certain adjustments and ratemaking refinements. The order approved Duke Energy Indiana’s requested forecasted rate base of $10.2 billion as of December 31, 2020, including the Edwardsport Integrated Gasification Combined Cycle (IGCC) Plant. The IURC reduced Duke Energy Indiana’s request by slightly more than $200 million, when accounting for the utility receipts tax and other adjustments. Approximately 50% of the reduction was due to a prospective change in depreciation and use of regulatory asset for the end-of-life inventory at retired generating plants, approximately 20% was due to the approved ROE of 9.7% versus the requested ROE of 10.4% and approximately 20% was related to miscellaneous earnings neutral adjustments. Step one rates were estimated to be approximately 75% of the total and became effective on July 30, 2020. Step two rates estimated to be the remaining 25% of the total rate increase were approved on July 28, 2021, and implemented in August 2021. Several groups appealed the IURC order to the Indiana Court of Appeals. The Indiana Court of Appeals affirmed the IURC decision on May 13, 2021. However, upon appeal by the Indiana Office of Utility Consumer Counselor (OUCC) and the Duke Industrial Group on March 10, 2022, the Indiana Supreme Court found that the IURC erred in allowing Duke Energy Indiana to recover coal ash costs incurred before the IURC’s rate case order in June 2020. The Indiana Supreme Court found that allowing Duke Energy Indiana to recover coal ash costs incurred between rate cases that exceeded the amount built into base rates violated the prohibition against retroactive ratemaking. The IURC’s order has been remanded to the IURC for additional proceedings consistent with the Indiana Supreme Court’s opinion. As a result of the court's opinion, Duke Energy Indiana recognized pretax charges of approximately $211 million to Impairment of assets and other charges and $46 million to Operating revenues in the Condensed Consolidated Statements of Operations for the three months ended March 31, 2022 . D uke Energy Indiana filed a request for rehearing with the Supreme Court on April 11, 2022, which the court denied on May 26, 2022. Duke Energy Indiana filed its testimony in the remand proceeding on August 18, 2022 . On February 3, 2023, Duke Energy Indiana filed a settlement agreement reached with the OUCC and Duke Industrial Group, which includes an agreed amount of approximately $70 million of refunds to be paid to customers. The IURC approved this settlement agreement in its entirety on April 12, 2023. 2020 Indiana Coal Ash Recovery Case In Duke Energy Indiana’s 2019 rate case, the IURC also opened a subdocket for post-2018 coal ash related expenditures. Duke Energy Indiana filed testimony on April 15, 2020, in the coal ash subdocket requesting recovery for the post-2018 coal ash basin closure costs for plans that have been approved by the Indiana Department of Environmental Management (IDEM) as well as continuing deferral, with carrying costs, on the balance. An evidentiary hearing was held on September 14, 2020. Briefing was completed by mid-September 2021. On November 3, 2021, the IURC issued an order allowing recovery for post-2018 coal ash basin closure costs for the plans that have been approved by IDEM, as well as continuing deferral, with carrying costs, on the balance. The OUCC and the Duke Industrial Group appealed. The Indiana Court of Appeals issued its opinion on February 21, 2023, reversing the IURC's order to the extent that it allowed Duke Energy Indiana to recover federally mandated costs incurred prior to the IURC's November 3, 2021 order. In addition, the court found that any costs incurred pre-petition to determine federally mandated compliance options were not specifically authorized by the statute and should also be disallowed. As a result of the Court's opinion, Duke Energy Indiana recognized a pretax charge of approximately $175 million to Impairment of assets and other charges for the year ended December 31, 2022. After the passage of Senate Enrolled Act 9, which amended the federal mandate statute to make clear that costs incurred pre-order are recoverable, Duke Energy Indiana filed a petition for rehearing with the Indiana Court of Appeals, which was denied on April 27, 2023. Duke Energy Indiana is evaluating whether to file a petition to transfer the case to the Indiana Supreme Court. Duke Energy Indiana cannot predict the outcome of this matter. TDSIC 2.0 On November 23, 2021, Duke Energy Indiana filed for approval of the Transmission, Distribution, Storage Improvement Charge 2.0 investment plan for 2023-2028 (TDSIC 2.0). On June 15, 2022, the IURC approved, without modification, TDSIC 2.0, which includes approximately $2 billion in transmission and distribution investments selected to improve customer reliability, harden and improve resiliency of the grid, enable expansion of renewable and distributed energy projects and encourage economic development. In addition, the IURC set up a subdocket to consider the targeted economic development project, which the IURC approved on March 2, 2022. On July 15, 2022, the OUCC filed a notice of appeal to the Indiana Court of Appeals in Duke Energy Indiana’s TDSIC 2.0 proceeding. An appellant brief was filed on October 28, 2022, and Duke Energy Indiana filed its responsive brief on December 28, 2022. The Indiana Court of Appeals issued its opinion on March 9, 2023, affirming the Commission’s order in its entirety. The Duke Industrial Group filed a petition to transfer to the Indiana Supreme Court. Duke Energy Indiana filed its opposition to transfer on April 11, 2023. Duke Energy Indiana cannot predict the outcome of this matter. Piedmont Tennessee Annual Review Mechanism On October 10, 2022, the TPUC approved Piedmont’s petition to adopt an Annual Review Mechanism (ARM) as allowed by Tennessee law. Under the ARM, Piedmont will adjust rates annually to achieve its allowed 9.80% ROE over the upcoming year and to true up any variance between its allowed ROE and actual ROE from the prior calendar year. The initial year subject to the true up is 2022, and the initial rate adjustments request will be filed in May 2023 for rates effective October 1, 2023.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES ENVIRONMENTAL The Duke Energy Registrants are subject to federal, state and local regulations regarding air and water quality, hazardous and solid waste disposal, coal ash and other environmental matters. These regulations can be changed from time to time, imposing new obligations on the Duke Energy Registrants. The following environmental matters impact all Duke Energy Registrants. Remediation Activities In addition to AROs recorded as a result of various environmental regulations, the Duke Energy Registrants are responsible for environmental remediation at various sites. These include certain properties that are part of ongoing operations and sites formerly owned or used by Duke Energy entities. These sites are in various stages of investigation, remediation and monitoring. Managed in conjunction with relevant federal, state and local agencies, remediation activities vary based on site conditions and location, remediation requirements, complexity and sharing of responsibility. If remediation activities involve joint and several liability provisions, strict liability, or cost recovery or contribution actions, the Duke Energy Registrants could potentially be held responsible for environmental impacts caused by other potentially responsible parties and may also benefit from insurance policies or contractual indemnities that cover some or all cleanup costs. Liabilities are recorded when losses become probable and are reasonably estimable. The total costs that may be incurred cannot be estimated because the extent of environmental impact, allocation among potentially responsible parties, remediation alternatives and/or regulatory decisions have not yet been determined at all sites. Additional costs associated with remediation activities are likely to be incurred in the future and could be significant. Costs are typically expensed as Operation, maintenance and other on the Condensed Consolidated Statements of Operations unless regulatory recovery of the costs is deemed probable. The following table contains information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Other within Other Noncurrent Liabilities on the Condensed Consolidated Balance Sheets. (in millions) March 31, 2023 December 31, 2022 Reserves for Environmental Remediation Duke Energy $ 86 $ 84 Duke Energy Carolinas 23 22 Progress Energy 20 19 Duke Energy Progress 9 8 Duke Energy Florida 11 11 Duke Energy Ohio 33 33 Duke Energy Indiana 3 3 Piedmont 7 7 Additional losses in excess of recorded reserves that could be incurred for the stages of investigation, remediation and monitoring for environmental sites that have been evaluated at this time are not material. LITIGATION D uke Energy Texas Storm Uri Tort Litigation Duke Energy (Parent) and several Duke Energy renewables project companies in the ERCOT market were named in several lawsuits arising out of Texas Storm Uri, which occurred in February 2021. Duke Energy (Parent) was dismissed from the suits, leaving two suits in which individual wind and solar projects are named. These lawsuits seek recovery for property damages, personal injury and wrongful death allegedly caused by the power outages that plaintiffs claim were the collective failure of generators, transmission and distribution operators, retail energy providers, and all others, including ERCOT. The cases were consolidated into a Texas state court multidistrict litigation (MDL) proceeding for discovery and pre-trial motions. Five MDL cases were designated as lead cases in which motions to dismiss were filed and all other cases were stayed. On January 28, 2023, the Court denied certain motions including those by the generator defendants and granted others. Defendants filed a petition for Writ of Mandamus to the Texas Court of Appeals seeking to overturn the denials, which is fully briefed and pending a decision from the Texas Court of Appeals. Since the ruling on the motion to dismiss, plaintiffs have served a number of new lawsuits on Duke Energy (Parent), Duke Energy Renewables, LLC, and several Duke Energy renewable entities. These new lawsuits are being included in the MDL proceeding and are currently stayed. Duke Energy cannot predict the outcomes of these matters. See Note 2 for more information related to the sale of the Commercial Renewables Disposal Groups. Duke Energy Carolinas Ruben Villano, et al. v. Duke Energy Carolinas, LLC On June 16, 2021, a group of nine individuals went over a low head dam adjacent to the Dan River Steam Station in Eden, North Carolina, while water tubing. Emergency personnel rescued four people and five others were confirmed deceased. On August 11, 2021, Duke Energy Carolinas was served with the complaint filed in Durham County Superior Court on behalf of four survivors, which was later amended to include all the decedents along with the survivors. The lawsuit alleges that Duke Energy Carolinas knew that the river was used for recreational purposes, did not adequately warn about the dam, and created a dangerous and hidden hazard on the Dan River by building and maintaining the low-head dam. Duke Energy Carolinas has reached an agreement in principle that will resolve this matter to the parties' mutual satisfaction. The resolution, which is not expected to have a material financial impact, is subject to court approval by the Durham County Superior Court . Duke Energy Carolinas cannot predict the outcome of this matter. NTE Carolinas II, LLC Litigation In November 2017, Duke Energy Carolinas entered into a standard FERC large generator interconnection agreement (LGIA) with NTE Carolinas II, LLC (NTE), a company that proposed to build a combined-cycle natural gas plant in Rockingham County, North Carolina. On September 6, 2019, Duke Energy Carolinas filed a lawsuit in Mecklenburg County Superior Court against NTE for breach of contract, alleging that NTE's failure to pay benchmark payments for Duke Energy Carolinas' transmission system upgrades required under the interconnection agreement constituted a termination of the interconnection agreement. Duke Energy Carolinas sought a monetary judgment against NTE because NTE failed to make multiple milestone payments. The lawsuit was moved to federal court in North Carolina. NTE filed a motion to dismiss Duke Energy Carolinas’ complaint and brought counterclaims alleging anti-competitive conduct and violations of state and federal statutes. Duke Energy Carolinas filed a motion to dismiss NTE's counterclaims. Both NTE's and Duke Energy Carolinas' motions to dismiss were subsequently denied by the court. On May 21, 2020, in response to a NTE petition challenging Duke Energy Carolinas' termination of the LGIA, FERC issued a ruling that 1) it has exclusive jurisdiction to determine whether a transmission provider may terminate a LGIA; 2) FERC approval is required to terminate a conforming LGIA if objected to by the interconnection customer; and 3) Duke Energy may not announce the termination of a conforming LGIA unless FERC has approved the termination. FERC's Office of Enforcement also initiated an investigation of Duke Energy Carolinas into matters pertaining to the LGIA. On April 6, 2023, Duke Energy Carolinas received notice from the FERC Office of Enforcement that they have closed their non-public investigation with no further action recommended. Following completion of discovery, Duke Energy Carolinas filed a motion for summary judgment seeking a ruling in its favor as to some of its affirmative claims against NTE and to all of NTE’s counterclaims. On June 24, 2022, the court issued an order partially granting Duke Energy Carolinas' motion by dismissing NTE's counterclaims that Duke Energy Carolinas engaged in anti-competitive behavior in violation of state and federal statutes. On October 12, 2022, the parties executed a settlement agreement with respect to the remaining breach of contract claims in the litigation and a Stipulation of Dismissal was filed with the court on October 13, 2022. On November 11, 2022, NTE filed its Notice of Appeal to the U.S. Court of Appeals for the Fourth Circuit as to the District Court's summary judgment ruling in Duke Energy Carolinas' favor on NTE's antitrust and unfair competition claims. Briefing on NTE's appeal will be completed on June 2, 2023. Duke Energy Carolinas cannot predict the outcome of this matter. Asbestos-related Injuries and Damages Claims Duke Energy Carolinas has experienced numerous claims for indemnification and medical cost reimbursement related to asbestos exposure. These claims relate to damages for bodily injuries alleged to have arisen from exposure to or use of asbestos in connection with construction and maintenance activities conducted on its electric generation plants prior to 1985. Duke Energy Caroli nas has recognized asbestos-related reserves of $451 million at March 31, 2023, and $457 million at December 31, 2022. These reserves are classified in Other within Other Noncurrent Liabilities and Other within Current Liabilities on the Condensed Consolidated Balance Sheets. These reserves are based on Duke Energy Carolinas' best estimate for current and future asbestos claims through 2042 and are recorded on an undiscounted basis. In light of the uncertainties inherent in a longer-term forecast, management does not believe they can reasonably estimate the indemnity and medical costs that might be incurred after 2042 related to such potential claims. It is possible Duke Energy Carolinas may incur asbestos liabilities in excess of the recorded reserves. Duke Energy Carolinas has third-party insurance to cover certain losses related to asbestos-related injuries and damages above an aggregate self-insured retention. Receivables for insurance recoveries were $595 million at March 31, 2023, and at December 31, 2022. These amounts are classified in Other within Other Noncurrent Assets and Receivables within Current Assets on the Condensed Consolidated Balance Sheets. Any future payments up to the policy limit will be reimbursed by the third-party insurance carrier. Duke Energy Carolinas is not aware of any uncertainties regarding the legal sufficiency of insurance claims. Duke Energy Carolinas believes the insurance recovery asset is probable of recovery as the insurance carrier continues to have a strong financial strength rating. The reserve for credit losses for insurance receivables is $12 million for Duke Energy and Duke Energy Carolinas as of March 31, 2023, and December 31, 2022. The insurance receivable is evaluated based on the risk of default and the historical losses, current conditions and expected conditions around collectability. Management evaluates the risk of default annually based on payment history, credit rating and changes in the risk of default from credit agencies. Duke Energy Indiana Coal Ash Insurance Coverage Litigation In June 2022, Duke Energy Indiana filed a civil action in Indiana Superior Court against various insurance companies seeking declaratory relief with respect to insurance coverage for coal combustion residuals-related expenses and liabilities covered by third-party liability insurance policies. The insurance policies cover the 1969-1972 and 1984-1985 periods and provide third-party liability insurance for claims and suits alleging property damage, bodily injury and personal injury (or a combination thereof). A trial date has not yet been set. Duke Energy Indiana cannot predict the outcome of this matter. Other Litigation and Legal Proceedings The Duke Energy Registrants are involved in other legal, tax and regulatory proceedings arising in the ordinary course of business, some of which involve significant amounts. The Duke Energy Registrants believe the final disposition of these proceedings will not have a material effect on their results of operations, cash flows or financial position. Reserves are classified on the Condensed Consolidated Balance Sheets in Other within Other Noncurrent Liabilities and Other within Current Liabilities. OTHER COMMITMENTS AND CONTINGENCIES General As part of their normal business, the Duke Energy Registrants are party to various financial guarantees, performance guarantees and other contractual commitments to extend guarantees of credit and other assistance to various subsidiaries, investees and other third parties. These guarantees involve elements of performance and credit risk, which are not fully recognized on the Condensed Consolidated Balance Sheets and have uncapped maximum potential payments. However, the Duke Energy Registrants do not believe these guarantees will have a material effect on their results of operations, cash flows or financial position. In addition, the Duke Energy Registrants enter into various fixed-price, noncancelable commitments to purchase or sell power or natural gas, take-or-pay arrangements, transportation, or throughput agreements and other contracts that may or may not be recognized on their respective Condensed Consolidated Balance Sheets. Some of these arrangements may be recognized at fair value on their respective Condensed Consolidated Balance Sheets if such contracts meet the definition of a derivative and the NPNS exception does not apply. In most cases, the Duke Energy Registrants’ purchase obligation contracts contain provisions for price adjustments, minimum purchase levels and other financial commitments.

Debt and Credit Facilities

Debt and Credit Facilities	3 Months Ended
Debt and Credit Facilities	Mar. 31, 2023
Debt Disclosure [Abstract]
Debt and Credit Facilities	DEBT AND CREDIT FACILITIES Debt related to the Commercial Renewables Disposal Groups is now classified as held for sale and is excluded from the following disclosures. See Note 2 for further information. SUMMARY OF SIGNIFICANT DEBT ISSUANCES The following table summarizes significant debt issuances (in millions). Three Months Ended March 31, 2023 Duke Duke Duke Duke Maturity Interest Duke Energy Energy Energy Energy Issuance Date Date Rate Energy Carolinas Progress Ohio Indiana First Mortgage Bonds January 2023 (a) January 2033 4.95 % $ 900 $ 900 $ — $ — $ — January 2023 (a) January 2053 5.35 % 900 900 — — — March 2023 (b) March 2033 5.25 % 500 — 500 — — March 2023 (b) March 2053 5.35 % 500 — 500 — — March 2023 (c) April 2033 5.25 % 375 — — 375 — March 2023 (c) April 2053 5.65 % 375 — — 375 — March 2023 (d) April 2053 5.40 % 500 — — — 500 Total issuances $ 4,050 $ 1,800 $ 1,000 $ 750 $ 500 (a) Proceeds were used to repay $1 billion of maturities due March 2023, to pay down a portion of short-term debt and for general company purposes. (b) Proceeds will be used to repay $300 million of maturities due September 2023, to pay down a portion of short-term debt and for general company purposes. (c) Proceeds will be used to repay $300 million of maturities due September 2023 and a portion of the $100 million term loan due October 2023. Remaining proceeds will be used to repay a portion of short-term debt and for general corporate purposes. (d) Proceeds were used to repay the $300 million term loan due October 2023. Remaining proceeds will be used to repay a portion of short-term debt and for general company purposes. Duke Energy (Parent) Convertible Senior Notes In April 2023, Duke Energy (Parent) completed the sale of $1.7 billion 4.125% Convertible Senior Notes due April 2026 (convertible notes). The convertible notes will be senior unsecured obligations of Duke Energy, and will mature on April 15, 2026, unless earlier converted or repurchased in accordance with their terms. The convertible notes will bear interest at a fixed rate of 4.125% per year, payable semiannually in arrears on April 15 and October 15 of each year, beginning on October 15, 2023. Proceeds will be used to repay a portion of outstanding commercial paper and for general corporate purposes. Prior to the close of business on the business day immediately preceding January 15, 2026, the convertible notes will be convertible at the option of the holders only under certain conditions. On or after January 15, 2026, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders of the convertible notes may convert all or any portion of their convertible notes at their option at any time at the conversion rate then in effect, irrespective of these conditions. Duke Energy will settle conversions of the convertible notes by paying cash up to the aggregate principal amount of the convertible notes to be converted and paying or delivering, as the case may be, cash, shares of Duke Energy's common stock, $0.001 par value per share, or a combination of cash and shares of its common stock, at its election, in respect of the remainder, if any, of its conversion obligation in excess of the aggregate principal amount of the convertible notes being converted. The conversion rate for the convertible notes will initially be 8.4131 shares of Duke Energy's common stock per $1,000 principal amount of convertible notes. The initial conversion price of the convertible notes represents a premium of approximately 25% over the last reported sale price of Duke Energy’s common stock on the NYSE on April 3, 2023. The conversion rate and the corresponding conversion price will be subject to adjustment in some events but will not be adjusted for any accrued and unpaid interest. Duke Energy may not redeem the convertible notes prior to the maturity date. Duke Energy issued the convertible notes pursuant to an indenture, dated as of April 6, 2023, by and between Duke Energy and The Bank of New York Mellon Trust Company, N.A., as trustee. The terms of the convertible notes include customary fundamental change provisions that require repayment of the notes with interest upon certain events, such as a stockholder approved plan of liquidation or if Duke Energy's common stock ceases to be listed on the NYSE. CURRENT MATURITIES OF LONG-TERM DEBT The following table shows the significant components of Current maturities of long-term debt on the Condensed Consolidated Balance Sheets. The Duke Energy Registrants currently anticipate satisfying these obligations with cash on hand and proceeds from additional borrowings. (in millions) Maturity Date Interest Rate March 31, 2023 Unsecured Debt Duke Energy (Parent) April 2023 2.875 % $ 350 Duke Energy (Parent) (a) June 2023 4.631 % 500 Duke Energy (Parent) October 2023 3.950 % 400 Duke Energy (Parent) Term Loan Facility (a) March 2024 5.385 % 1,000 Duke Energy Ohio (a) October 2023 4.879 % 150 First Mortgage Bonds Duke Energy Progress September 2023 3.375 % 300 Duke Energy Ohio September 2023 3.800 % 300 Other (b) 330 Current maturities of long-term debt $ 3,330 (a) Debt has a floating interest rate. (b) Includes finance lease obligations, amortizing debt, tax-exempt bonds with mandatory put options and small bullet maturities. AVAILABLE CREDIT FACILITIES Master Credit Facility In March 2023, Duke Energy amended its existing Master Credit Facility of $9 billion to extend the termination date to March 2028. The Duke Energy Registrants, excluding Progress Energy, have borrowing capacity under the Master Credit Facility up to a specified sublimit for each borrower. Duke Energy has the unilateral ability at any time to increase or decrease the borrowing sublimits of each borrower, subject to a maximum sublimit for each borrower. The amount available under the Master Credit Facility has been reduced to backstop issuances of commercial paper, certain letters of credit and variable-rate demand tax-exempt bonds that may be put to the Duke Energy Registrants at the option of the holder. An amendment in conjunction with the issuance of the Convertible Senior Notes due April 2026 clarifies that payments due as a result of a conversion of a convertible note would not constitute an event of default. The table below includes the current borrowing sublimits and available capacity under these credit facilities. March 31, 2023 Duke Duke Duke Duke Duke Duke Duke Energy Energy Energy Energy Energy Energy (in millions) Energy (Parent) Carolinas Progress Florida Ohio Indiana Piedmont Facility size (a) $ 9,000 $ 2,275 $ 2,025 $ 900 $ 1,350 $ 700 $ 950 $ 800 Reduction to backstop issuances Commercial paper (b) (3,452) (494) (1,310) (150) (776) (93) (328) (301) Outstanding letters of credit (39) (27) (4) (1) (7) — — — Tax-exempt bonds (81) — — — — — (81) — Available capacity under the Master Credit Facility $ 5,428 $ 1,754 $ 711 $ 749 $ 567 $ 607 $ 541 $ 499 (a) Represents the sublimit of each borrower. (b) Duke Energy issued $625 million of commercial paper and loaned the proceeds through the money pool to Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio and Duke Energy Indiana. The balances are classified as Long-Term Debt Payable to Affiliated Companies on the Condensed Consolidated Balance Sheets. Other Credit Facilities Duke Energy (Parent) Term Loan Facility In March 2022, Duke Energy (Parent) entered into a Term Loan Credit Agreement (Credit Agreement) with commitments totaling $1.4 billion maturing March 2024. The maturity date of the Credit Agreement may be extended for up to two years by request of Duke Energy (Parent), upon satisfaction of certain conditions contained in the Credit Agreement. Borrowings under the facility were used to repay amounts drawn under the Three-Year Revolving Credit Facility and for general corporate purposes, including repayment of a portion of Duke Energy's outstanding commercial paper. The balance is classified as Current maturities of long-term debt on Duke Energy's Condensed Consolidated Balance Sheets. In March 2023, Duke Energy amended its existing Credit Agreement in conjunction with the issuance of the Convertible Senior Notes due April 2026 to clarify that payments due as a result of a conversion of a convertible note would not constitute an event of default.

Goodwill

Goodwill	3 Months Ended
Goodwill	Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	GOODWILL Duke Energy Duke Energy's Goodwill balance of $19.3 billion is allocated $17.4 billion to EU&I and $1.9 billion to GU&I on Duke Energy's Condensed Consolidated Balance Sheets at March 31, 2023, and December 31, 2022. There are no accumulated impairment charges. Duke Energy Ohio Duke Energy Ohio's Goodwill balance of $920 million, allocated $596 million to EU&I and $324 million to GU&I, is presented net of accumulated impairment charges of $216 million on the Condensed Consolidated Balance Sheets at March 31, 2023, and December 31, 2022. Progress Energy Progress Energy's Goodwill is included in the EU&I segment and there are no accumulated impairment charges. Piedmont Piedmont's Goodwill is included in the GU&I segment and there are no accumulated impairment charges.

Related Party Transactions

Related Party Transactions	3 Months Ended
Related Party Transactions	Mar. 31, 2023
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS The Subsidiary Registrants engage in related party transactions in accordance with applicable state and federal commission regulations. Refer to the Condensed Consolidated Balance Sheets of the Subsidiary Registrants for balances due to or due from related parties. Material amounts related to transactions with related parties included on the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table. Three Months Ended March 31, (in millions) 2023 2022 Duke Energy Carolinas Corporate governance and shared service expenses (a) $ 196 $ 206 Indemnification coverages (b) 9 7 Joint Dispatch Agreement (JDA) revenue (c) 13 26 JDA expense (c) 29 94 Intercompany natural gas purchases (d) 5 13 Progress Energy Corporate governance and shared service expenses (a) $ 178 $ 196 Indemnification coverages (b) 12 11 JDA revenue (c) 29 94 JDA expense (c) 13 26 Intercompany natural gas purchases (d) 19 19 Duke Energy Progress Corporate governance and shared service expenses (a) $ 107 $ 119 Indemnification coverages (b) 5 5 JDA revenue (c) 29 94 JDA expense (c) 13 26 Intercompany natural gas purchases (d) 19 19 Duke Energy Florida Corporate governance and shared service expenses (a) $ 71 $ 77 Indemnification coverages (b) 7 6 Duke Energy Ohio Corporate governance and shared service expenses (a) $ 73 $ 82 Indemnification coverages (b) 1 1 Duke Energy Indiana Corporate governance and shared service expenses (a) $ 99 $ 124 Indemnification coverages (b) 2 2 Piedmont Corporate governance and shared service expenses (a) $ 38 $ 35 Indemnification coverages (b) 1 1 Intercompany natural gas sales (d) 24 32 Natural gas storage and transportation costs (e) 6 6 (a) The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, information technology, legal and accounting fees, as well as other third-party costs. These amounts are primarily recorded in Operation, maintenance and other and Impairment of assets and other charges on the Condensed Consolidated Statements of Operations and Comprehensive Income. (b) The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income. (c) Duke Energy Carolinas and Duke Energy Progress participate in a JDA, which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power and expenses from the purchase of power pursuant to the JDA are recorded in Operating Revenues and Fuel used in electric generation and purchased power, respectively, on the Condensed Consolidated Statements of Operations and Comprehensive Income. (d) Piedmont provides long-term natural gas delivery service to certain Duke Energy Carolinas and Duke Energy Progress natural gas-fired generation facilities. Piedmont records the sales in Operating Revenues, and Duke Energy Carolinas and Duke Energy Progress record the related purchases as a component of Fuel used in electric generation and purchased power on their respective Condensed Consolidated Statements of Operations and Comprehensive Income. (e) Piedmont has related party transactions as a customer of its equity method investments in Pine Needle LNG Company, LLC, Hardy Storage Company, LLC and Cardinal Pipeline Company, LLC natural gas storage and transportation facilities. These expenses are included in Cost of natural gas on Piedmont's Condensed Consolidated Statements of Operations and Comprehensive Income. In addition to the amounts presented above, the Subsidiary Registrants have other affiliate transactions, including rental of office space, participation in a money pool arrangement, other operational transactions, such as pipeline lease arrangements, and their proportionate share of certain charged expenses. These transactions of the Subsidiary Registrants are incurred in the ordinary course of business and are eliminated in consolidation. As discussed in Note 12, certain trade receivables have been sold by Duke Energy Ohio and Duke Energy Indiana to CRC, an affiliate formed by a subsidiary of Duke Energy. The proceeds obtained from the sales of receivables are largely cash but do include a subordinated note from CRC for a portion of the purchase price. Intercompany Income Taxes Duke Energy and the Subsidiary Registrants file a consolidated federal income tax return and other state and jurisdictional returns. The Subsidiary Registrants have a tax sharing agreement with Duke Energy for the allocation of consolidated tax liabilities and benefits. Income taxes recorded represent amounts the Subsidiary Registrants would incur as separate C-Corporations. The following table includes the balance of intercompany income tax receivables and payables for the Subsidiary Registrants. Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Carolinas Energy Progress Florida Ohio Indiana Piedmont March 31, 2023 Intercompany income tax receivable $ — $ 21 $ — $ — $ — $ — $ — Intercompany income tax payable — — 2 30 15 24 38 December 31, 2022 Intercompany income tax receivable $ — $ 95 $ 36 $ 17 $ — $ — $ — Intercompany income tax payable 37 — — — 17 18 38

Derivatives and Hedging

Derivatives and Hedging	3 Months Ended
Derivatives and Hedging	Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging	DERIVATIVES AND HEDGING The Duke Energy Registrants use commodity, interest rate and foreign currency contracts to manage commodity price risk, interest rate risk and foreign currency exchange rate risk. The primary use of commodity derivatives is to hedge the generation portfolio against changes in the prices of electricity and natural gas. Piedmont enters into natural gas supply contracts to provide diversification, reliability and natural gas cost benefits to its customers. Interest rate derivatives are used to manage interest rate risk associated with borrowings. Foreign currency derivatives are used to manage risk related to foreign currency exchange rates on certain issuances of debt. Derivatives related to interest rate risk for the Commercial Renewables Disposal Groups are now classified as held for sale and are excluded from the following disclosures. See Note 2 for further information. All derivative instruments not identified as NPNS are recorded at fair value as assets or liabilities o n the Condensed Consolidated Balance Sheets. Cash collateral related to derivative instruments ex ecuted under master netting arrangements is offset against the collateralized derivatives on the Condensed Consolidated Balance Sheets. The cash impacts of settled derivatives are recorded as operating activities or financing activities on the Condensed Consolidated Statements of Cash Flows consistent with the classification of the hedged transaction. INTEREST RATE RISK The Duke Energy Registrants are exposed to changes in interest rates as a result of their issuance or anticipated issuance of variable-rate and fixed-rate debt and commercial paper. Interest rate risk is managed by limiting variable-rate exposures to a percentage of total debt and by monitoring changes in interest rates. To manage risk associated with changes in interest rates, the Duke Energy Registrants may enter into interest rate swaps, U.S. Treasury lock agreements and other financial contracts. In anticipation of certain fixed-rate debt issuances, a series of forward-starting interest rate swaps or Treasury locks may be executed to lock in components of current market interest rates. These instruments are later terminated prior to or upon the issuance of the corresponding debt. Cash Flow Hedges For a derivative designated as hedging the exposure to variable cash flows of a future transaction, referred to as a cash flow hedge, the effective portion of the derivative's gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings once the future transaction impacts earnings. Amounts for interest rate contracts are reclassified to earnings as interest expense over the term of the related debt. Gains and losses reclassified out of accumulated other comprehensive income (loss) for the three months ended March 31, 2023, and 2022, were not material. Duke Energy's interest rate derivatives designated as hedges include forward-starting interest rate swaps not accounted for under regulatory accounting. Undesignated Contracts Undesignated contracts primarily include contracts not designated as a hedge because they are accounted for under regulatory accounting or contracts that do not qualify for hedge accounting. Duke Energy’s interest rate swaps for its regulated operations employ regulatory accounting. With regulatory accounting, the mark-to-market gains or losses on the swaps are deferred as regulatory liabilities or regulatory assets, respectively. Regulatory assets and liabilities are amortized consistent with the treatment of the related costs in the ratemaking process. The accrual of interest on the swaps is recorded as Interest Expense on the Duke Energy Registrant's Condensed Consolidated Statements of Operations and Comprehensive Income. The following tables show notional amounts of outstanding derivatives related to interest rate risk. March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Ohio Cash flow hedges $ 1,300 $ — $ — $ — $ — $ — $ — Undesignated contracts 2,077 800 1,050 250 800 200 27 Total notional amount $ 3,377 $ 800 $ 1,050 $ 250 $ 800 $ 200 $ 27 December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Ohio Cash flow hedges $ 500 $ — $ — $ — $ — $ — $ — Undesignated contracts 2,377 1,250 800 500 300 300 27 Total notional amount $ 2,877 $ 1,250 $ 800 $ 500 $ 300 $ 300 $ 27 COMMODITY PRICE RISK The Duke Energy Registrants are exposed to the impact of changes in the prices of electricity purchased and sold in bulk power markets and natural gas purchases, including Piedmont's natural gas supply contracts. Exposure to commodity price risk is influenced by a number of factors including the term of contracts, the liquidity of markets and delivery locations. To manage risk associated with commodity prices, the Duke Energy Registrants may enter into long-term power purchase or sales contracts and long-term natural gas supply agreements. Undesignated Contracts Undesignated contracts primarily include contracts not designated as a hedge because they are accounted for under regulatory accounting or contracts that do not qualify for hedge accounting. For the Subsidiary Registrants, bulk power electricity and natural gas purchases flow through fuel adjustment clauses, formula-based contracts or other cost-sharing mechanisms. Differences between the costs included in rates and the incurred costs, including undesignated derivative contracts, are largely deferred as regulatory assets or regulatory liabilities. Piedmont policies allow for the use of financial instruments to hedge commodity price risks. The strategy and objective of these hedging programs are to use the financial instruments to reduce natural gas cost volatility for customers. Volumes The tables below include volumes of outstanding commodity derivatives. Amounts disclosed represent the absolute value of notional volumes of commodity contracts excluding NPNS. The Duke Energy Registrants have netted contractual amounts where offsetting purchase and sale contracts exist with identical delivery locations and times of delivery. Where all commodity positions are perfectly offset, no quantities are shown. March 31, 2023 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 5,984 — — — 720 5,264 — Natural gas (millions of dekatherms) 903 311 294 294 — 8 290 December 31, 2022 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 14,086 — — — 1,820 12,266 — Natural gas (millions of dekatherms) 909 307 292 292 — 11 299 FOREIGN CURRENCY RISK Duke Energy may enter into foreign currency derivatives to hedge exposure to changes in foreign currency exchange rates, such as that arising from the issuance of debt denominated in a currency other than U.S. dollars. Fair Value Hedges Derivatives related to existing fixed rate securities are accounted for as fair value hedges, where the derivatives’ fair value gains or losses and hedged items’ fair value gains or losses are both recorded directly to earnings on the same income statement line item, including foreign currency gains or losses arising from changes in the U.S. currency exchange rates. Duke Energy has elected to exclude the cross-currency basis spread from the assessment of effectiveness in the fair value hedges of its foreign currency risk and record any difference between the change in the fair value of the excluded components and the amounts recognized in earnings as a component of other comprehensive income or loss. The following table shows Duke Energy's outstanding derivatives related to foreign currency risk at March 31, 2023. Fair Value Gain (Loss) (a) Pay Notional Receive Notional Receive Hedge (in millions) (in millions) Pay Rate (in millions) Rate Maturity Date Three months ended March 31, 2023 Fair value hedges $ 645 4.75 % 600 euros 3.10 % June 2028 $ 5 537 5.31 % 500 euros 3.85 % June 2034 5 Total notional amount $ 1,182 1,100 euros $ 10 (a) Amounts are recorded in Other Income and expenses, net on the Condensed Consolidated Statement of Operations, which offsets an equal translation adjustment of the foreign denominated debt. See the Condensed Consolidated Statements of Comprehensive Income for amounts excluded from the assessment of effectiveness for which the difference between changes in fair value and periodic amortization is recorded. LOCATION AND FAIR VALUE OF DERIVATIVE ASSETS AND LIABILITIES RECOGNIZED IN THE CONDENSED CONSOLIDATED BALANCE SHEETS The following tables show the fair value and balance sheet location of derivative instruments. Although derivatives subject to master netting arrangements are netted on the Condensed Consolidated Balance Sheets, the fair values presented below are shown gross and cash collateral on the derivatives has not been netted against the fair values shown. Derivative Assets March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 35 $ 12 $ 9 $ 9 $ — $ 1 $ 11 $ 1 Noncurrent 140 67 73 73 — — — — Total Derivative Assets – Commodity Contracts $ 175 $ 79 $ 82 $ 82 $ — $ 1 $ 11 $ 1 Interest Rate Contracts Designated as Hedging Instruments Current $ 86 $ — $ — $ — $ — $ — $ — $ — Not Designated as Hedging Instruments Current 7 1 6 — 6 — — — Total Derivative Assets – Interest Rate Contracts $ 93 $ 1 $ 6 $ — $ 6 $ — $ — $ — Total Derivative Assets $ 268 $ 80 $ 88 $ 82 $ 6 $ 1 $ 11 $ 1 Derivative Liabilities March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 264 $ 143 $ 90 $ 90 $ — $ — $ 19 $ 12 Noncurrent 237 54 51 51 — — — 132 Total Derivative Liabilities – Commodity Contracts $ 501 $ 197 $ 141 $ 141 $ — $ — $ 19 $ 144 Interest Rate Contracts Designated as Hedging Instruments Noncurrent 14 — — — — — — — Not Designated as Hedging Instruments Noncurrent 26 4 12 8 3 1 9 — Total Derivative Liabilities – Interest Rate Contracts $ 40 $ 4 $ 12 $ 8 $ 3 $ 1 $ 9 $ — Foreign Currency Contracts Designated as Hedging Instruments Current $ 18 $ — $ — $ — $ — $ — $ — $ — Noncurrent 44 — — — — — — — Total Derivative Liabilities – Foreign Currency Contracts $ 62 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 603 $ 201 $ 153 $ 149 $ 3 $ 1 $ 28 $ 144 Derivative Assets December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 265 $ 132 $ 99 $ 99 $ — $ 5 $ 29 $ — Noncurrent 213 104 108 108 — — — — Total Derivative Assets – Commodity Contracts $ 478 $ 236 $ 207 $ 207 $ — $ 5 $ 29 $ — Interest Rate Contracts Designated as Hedging Instruments Current $ 101 $ — $ — $ — $ — $ — $ — $ — Not Designated as Hedging Instruments Current $ 216 $ 94 $ 41 $ 23 $ 17 $ — $ 81 $ — Total Derivative Assets – Interest Rate Contracts $ 317 $ 94 $ 41 $ 23 $ 17 $ — $ 81 $ — Total Derivative Assets $ 795 $ 330 $ 248 $ 230 $ 17 $ 5 $ 110 $ — Derivative Liabilities December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 175 $ 96 $ 36 $ 18 $ 19 $ — $ 16 $ 27 Noncurrent 202 31 30 30 — — — 141 Total Derivative Liabilities – Commodity Contracts $ 377 $ 127 $ 66 $ 48 $ 19 $ — $ 16 $ 168 Interest Rate Contracts Not Designated as Hedging Instruments Noncurrent $ 2 $ — $ — $ — $ — $ 2 $ — $ — Total Derivative Liabilities – Interest Rate Contracts $ 2 $ — $ — $ — $ — $ 2 $ — $ — Foreign Currency Contracts Designated as Hedging Instruments Current $ 18 $ — $ — $ — $ — $ — $ — $ — Noncurrent 40 — — — — — — — Total Derivative Liabilities – Equity Securities Contracts $ 58 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 437 $ 127 $ 66 $ 48 $ 19 $ 2 $ 16 $ 168 OFFSETTING ASSETS AND LIABILITIES The following tables present the line items on the Condensed Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. The gross amounts offset in the tables below show the effect of these netting arrangements on financial position and include collateral posted to offset the net position. The amounts shown are calculated by counterparty. Accounts receivable or accounts payable may also be available to offset exposures in the event of bankruptcy. These amounts are not included in the tables below. Derivative Assets March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 128 $ 13 $ 15 $ 9 $ 6 $ 1 $ 11 $ 1 Gross amounts offset (19) (11) (8) (8) — — — — Net amounts presented in Current Assets: Other $ 109 $ 2 $ 7 $ 1 $ 6 $ 1 $ 11 $ 1 Noncurrent Gross amounts recognized $ 140 $ 67 $ 73 $ 73 $ — $ — $ — $ — Gross amounts offset (78) (38) (40) (40) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 62 $ 29 $ 33 $ 33 $ — $ — $ — $ — Derivative Liabilities March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 282 $ 143 $ 90 $ 90 $ — $ — $ 19 $ 12 Gross amounts offset (47) (20) (8) (8) — — (19) — Net amounts presented in Current Liabilities: Other $ 235 $ 123 $ 82 $ 82 $ — $ — $ — $ 12 Noncurrent Gross amounts recognized $ 321 $ 58 $ 63 $ 59 $ 3 $ 1 $ 9 $ 132 Gross amounts offset (83) (43) (40) (40) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 238 $ 15 $ 23 $ 19 $ 3 $ 1 $ 9 $ 132 Derivative Assets December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 582 $ 226 $ 140 $ 122 $ 17 $ 5 $ 110 $ — Gross amounts offset (64) (33) (30) (30) — — — — Net amounts presented in Current Assets: Other $ 518 $ 193 $ 110 $ 92 $ 17 $ 5 $ 110 $ — Noncurrent Gross amounts recognized $ 213 $ 104 $ 108 $ 108 $ — $ — $ — $ — Gross amounts offset (97) (40) (57) (57) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 116 $ 64 $ 51 $ 51 $ — $ — $ — $ — Derivative Liabilities December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 193 $ 96 $ 36 $ 18 $ 19 $ — $ 16 $ 27 Gross amounts offset (49) (15) (18) (18) — — (16) — Net amounts presented in Current Liabilities: Other $ 144 $ 81 $ 18 $ — $ 19 $ — $ — $ 27 Noncurrent Gross amounts recognized $ 244 $ 31 $ 30 $ 30 $ — $ 2 $ — $ 141 Gross amounts offset (59) (29) (30) (30) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 185 $ 2 $ — $ — $ — $ 2 $ — $ 141 OBJECTIVE CREDIT CONTINGENT FEATURES Certain derivative contracts contain objective credit contingent features. These features include the requirement to post cash collateral or letters of credit if specific events occur, such as a credit rating downgrade below investment grade. The following tables show information with respect to derivative contracts that are in a net liability position and contain objective credit risk-related payment provisions. March 31, 2023 Duke Duke Duke Energy Progress Energy (in millions) Energy Carolinas Energy Progress Aggregate fair value of derivatives in a net liability position $ 106 $ 54 $ 52 $ 52 Fair value of collateral already posted 10 10 — — Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered $ 96 $ 44 $ 52 $ 52 December 31, 2022 Duke Duke Duke Duke Energy Progress Energy Energy (in millions) Energy Carolinas Energy Progress Florida Aggregate fair value of derivatives in a net liability position $ 141 $ 86 $ 55 $ 48 $ 7 Fair value of collateral already posted — — — — — Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered $ 141 $ 86 $ 55 $ 48 $ 7 The Duke Energy Registrants have elected to offset cash collateral and fair values of derivatives. For amounts to be netted, the derivative and cash collateral must be executed with the same counterparty under the same master netting arrangement.

Investments in Debt and Equity

Investments in Debt and Equity Securities	3 Months Ended
Investments in Debt and Equity Securities	Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Investments In Debt and Equity Securities	INVESTMENTS IN DEBT AND EQUITY SECURITIES Duke Energy’s investments in debt and equity securities are primarily comprised of investments held in (i) the NDTF at Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, (ii) the grantor trusts at Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana related to OPEB plans and (iii) Bison. The Duke Energy Registrants classify investments in debt securities as Available for Sale (AFS) and investments in equity securities as fair value through net income (FV-NI). For investments in debt securities classified as AFS, the unrealized gains and losses are included in other comprehensive income until realized, at which time they are reported through net income. For investments in equity securities classified as FV-NI, both realized and unrealized gains and losses are reported through net income. Substantially all of Duke Energy’s investments in debt and equity securities qualify for regulatory accounting, and accordingly, all associated realized and unrealized gains and losses on these investments are deferred as a regulatory asset or liability. Duke Energy classifies the majority of investments in debt and equity securities as long term, unless otherwise noted. Investment Trusts The investments within the Investment Trusts are managed by independent investment managers with discretion to buy, sell and invest pursuant to the guidelines set forth by the investment manager agreements and trust agreements. The Duke Energy Registrants have limited oversight of the day-to-day management of these investments. As a result, the ability to hold investments in unrealized loss positions is outside the control of the Duke Energy Registrants. Accordingly, all unrealized losses associated with debt securities within the Investment Trusts are recognized immediately and deferred to regulatory accounts where appropriate. Other AFS Securities Unrealized gains and losses on all other AFS securities are included in other comprehensive income until realized, unless it is determined the carrying value of an investment has a credit loss. The Duke Energy Registrants analyze all investment holdings each reporting period to determine whether a decline in fair value is related to a credit loss. If a credit loss exists, the unrealized credit loss is included in earnings. There were no material credit losses as of March 31, 2023, and December 31, 2022. Other Investments amounts are recorded in Other within Other Noncurrent Assets on the Condensed Consolidated Balance Sheets. DUKE ENERGY The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 161 $ — $ — $ 215 Equity securities 4,048 60 6,367 3,658 105 5,871 Corporate debt securities 3 65 616 1 85 641 Municipal bonds 1 27 337 — 39 330 U.S. government bonds 9 85 1,495 2 112 1,423 Other debt securities — 15 147 — 18 156 Total NDTF Investments $ 4,061 $ 252 $ 9,123 $ 3,661 $ 359 $ 8,636 Other Investments Cash and cash equivalents $ — $ — $ 134 $ — $ — $ 22 Equity securities 25 11 137 21 16 128 Corporate debt securities — 10 87 — 12 84 Municipal bonds — 2 80 — 3 78 U.S. government bonds — — 69 — 2 62 Other debt securities — 2 42 — 3 41 Total Other Investments $ 25 $ 25 $ 549 $ 21 $ 36 $ 415 Total Investments $ 4,086 $ 277 $ 9,672 $ 3,682 $ 395 $ 9,051 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2023, and 2022, were as follows. Three Months Ended (in millions) March 31, 2023 March 31, 2022 FV-NI: Realized gains $ 26 $ 111 Realized losses 46 85 AFS: Realized gains 8 4 Realized losses 32 23 DUKE ENERGY CAROLINAS The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 69 $ — $ — $ 117 Equity securities 2,375 29 3,677 2,147 51 3,367 Corporate debt securities 2 47 384 1 62 401 Municipal bonds — 5 56 — 10 64 U.S. government bonds 5 38 746 1 51 685 Other debt securities — 15 143 — 18 148 Total NDTF Investments $ 2,382 $ 134 $ 5,075 $ 2,149 $ 192 $ 4,782 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2023, and 2022, were as follows. Three Months Ended (in millions) March 31, 2023 March 31, 2022 FV-NI: Realized gains $ 18 $ 75 Realized losses 29 49 AFS: Realized gains 5 3 Realized losses 20 16 PROGRESS ENERGY The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 92 $ — $ — $ 98 Equity securities 1,673 31 2,690 1,511 54 2,504 Corporate debt securities 1 18 232 — 23 240 Municipal bonds 1 22 281 — 29 266 U.S. government bonds 4 47 749 1 61 738 Other debt securities — — 4 — — 8 Total NDTF Investments $ 1,679 $ 118 $ 4,048 $ 1,512 $ 167 $ 3,854 Other Investments Cash and cash equivalents $ — $ — $ 8 $ — $ — $ 11 Municipal bonds — — 25 — — 25 Total Other Investments $ — $ — $ 33 $ — $ — $ 36 Total Investments $ 1,679 $ 118 $ 4,081 $ 1,512 $ 167 $ 3,890 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2023, and 2022, were as follows. Three Months Ended (in millions) March 31, 2023 March 31, 2022 FV-NI: Realized gains $ 8 $ 36 Realized losses 17 36 AFS: Realized gains 3 1 Realized losses 12 6 DUKE ENERGY PROGRESS The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 72 $ — $ — $ 56 Equity securities 1,586 31 2,590 1,431 54 2,411 Corporate debt securities 1 17 222 — 22 230 Municipal bonds 1 22 281 — 29 266 U.S. government bonds 4 28 470 1 37 460 Other debt securities — — 4 — — 7 Total NDTF Investments $ 1,592 $ 98 $ 3,639 $ 1,432 $ 142 $ 3,430 Other Investments Cash and cash equivalents $ — $ — $ 7 $ — $ — $ 9 Total Other Investments $ — $ — $ 7 $ — $ — $ 9 Total Investments $ 1,592 $ 98 $ 3,646 $ 1,432 $ 142 $ 3,439 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2023, and 2022, were as follows. Three Months Ended (in millions) March 31, 2023 March 31, 2022 FV-NI: Realized gains $ 8 $ 36 Realized losses 17 35 AFS: Realized gains 3 1 Realized losses 12 5 DUKE ENERGY FLORIDA The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 20 $ — $ — $ 42 Equity securities 87 — 100 80 — 93 Corporate debt securities — 1 10 — 1 10 U.S. government bonds — 19 279 — 24 278 Other debt securities — — — — — 1 Total NDTF Investments (a) $ 87 $ 20 $ 409 $ 80 $ 25 $ 424 Other Investments Cash and cash equivalents $ — $ — $ — $ — $ — $ 1 Municipal bonds — — 25 — — 25 Total Other Investments $ — $ — $ 25 $ — $ — $ 26 Total Investments $ 87 $ 20 $ 434 $ 80 $ 25 $ 450 (a) During the three months ended March 31, 2023, and the year ended December 31, 2022, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3. Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2023, and 2022, were immaterial. DUKE ENERGY INDIANA The following table presents the estimated fair value of investments in debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value Investments Cash and cash equivalents $ — $ — $ 1 $ — $ — $ 1 Equity securities 3 11 85 2 16 79 Corporate debt securities — — 9 — 1 8 Municipal bonds — 2 46 — 3 45 U.S. government bonds — — 9 — — 7 Total Investments $ 3 $ 13 $ 150 $ 2 $ 20 $ 140 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2023, and 2022, were immaterial. DEBT SECURITY MATURITIES The table below summarizes the maturity date for debt securities. March 31, 2023 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Due in one year or less $ 115 $ 5 $ 96 $ 19 $ 77 $ 6 Due after one through five years 793 277 424 238 186 23 Due after five through 10 years 522 262 207 194 13 11 Due after 10 years 1,443 785 564 526 38 24 Total $ 2,873 $ 1,329 $ 1,291 $ 977 $ 314 $ 64

Fair Value Measurements

Fair Value Measurements	3 Months Ended
Fair Value Measurements	Mar. 31, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS Fair value is the exchange price to sell an asset or transfer a liability in an orderly transaction between market participants at the measurement date. The fair value definition focuses on an exit price versus the acquisition cost. Fair value measurements use market data or assumptions market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs may be readily observable, corroborated by market data or generally unobservable. Valuation techniques maximize the use of observable inputs and minimize the use of unobservable inputs. A midmarket pricing convention (the midpoint price between bid and ask prices) is permitted for use as a practical expedient. Fair value measurements are classified in three levels based on the fair value hierarchy as defined by GAAP. Certain investments are not categorized within the fair value hierarchy. These investments are measured at fair value using the net asset value per share practical expedient. The net asset value is derived based on the investment cost, less any impairment, plus or minus changes resulting from observable price changes for an identical or similar investment of the same issuer. Fair value accounting guidance permits entities to elect to measure certain financial instruments that are not required to be accounted for at fair value, such as equity method investments or the company’s own debt, at fair value. The Duke Energy Registrants have not elected to record any of these items at fair value. Valuation methods of the primary fair value measurements disclosed below are as follows. Investments in equity securities The majority of investments in equity securities are valued using Level 1 measurements. Investments in equity securities are typically valued at the closing price in the principal active market as of the last business day of the quarter. Principal active markets for equity prices include published exchanges such as the NYSE and Nasdaq Stock Market. Foreign equity prices are translated from their trading currency using the currency exchange rate in effect at the close of the principal active market. There was no after-hours market activity that was required to be reflected in the reported fair value measurements. Investments in debt securities Most investments in debt securities are valued using Level 2 measurements because the valuations use interest rate curves and credit spreads applied to the terms of the debt instrument (maturity and coupon interest rate) and consider the counterparty credit rating. If the market for a particular fixed-income security is relatively inactive or illiquid, the measurement is Level 3. Commodity derivatives Commodity derivatives with clearinghouses are classified as Level 1. Commodity derivatives with observable forward curves are classified as Level 2. If forward price curves are not observable for the full term of the contract and the unobservable period had more than an insignificant impact on the valuation, the commodity derivative is classified as Level 3. In isolation, increases (decreases) in natural gas forward prices result in favorable (unfavorable) fair value adjustments for natural gas purchase contracts; and increases (decreases) in electricity forward prices result in unfavorable (favorable) fair value adjustments for electricity sales contracts. Duke Energy regularly evaluates and validates pricing inputs used to estimate the fair value of natural gas commodity contracts by a market participant price verification procedure. This procedure provides a comparison of internal forward commodity curves to market participant generated curves. Interest rate derivatives Most over-the-counter interest rate contract derivatives are valued using financial models that utilize observable inputs for similar instruments and are classified as Level 2. Inputs include forward interest rate curves, notional amounts, interest rates and credit quality of the counterparties. Derivatives related to interest rate risk for the Commercial Renewables Disposal Groups are now classified as held for sale and are excluded from the following disclosures. See Note 2 for further information. Foreign currency derivatives Most over-the-counter foreign currency derivatives are valued using financial models that utilize observable inputs for similar instruments and are classified as Level 2. Inputs include forward foreign currency rate curves, notional amounts, rates and credit quality of the counterparties. Other fair value considerations See Note 12 in Duke Energy's Annual Report on Form 10-K for the year ended December 31, 2022, for a discussion of the valuation of goodwill and intangible assets. DUKE ENERGY The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. Derivative amounts in the tables below for all Duke Energy Registrants exclude cash collateral, which is disclosed in Note 9. See Note 10 for additional information related to investments by major security type for the Duke Energy Registrants. March 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 161 $ 161 $ — $ — $ — NDTF equity securities 6,367 6,326 — — 41 NDTF debt securities 2,595 822 1,773 — — Other equity securities 137 137 — — — Other debt securities 278 60 218 — — Other cash and cash equivalents 134 134 — — — Derivative assets 268 1 255 12 — Total assets 9,940 7,641 2,246 12 41 Derivative liabilities (603) (19) (584) — — Net assets (liabilities) $ 9,337 $ 7,622 $ 1,662 $ 12 $ 41 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 215 $ 215 $ — $ — $ — NDTF equity securities 5,871 5,829 — — 42 NDTF debt securities 2,550 780 1,770 — — Other equity securities 128 128 — — — Other debt securities 265 55 210 — — Other cash and cash equivalents 22 22 — — — Derivative assets 795 1 760 34 — Total assets 9,846 7,030 2,740 34 42 Derivative liabilities (437) (16) (421) — — Net assets (liabilities) $ 9,409 $ 7,014 $ 2,319 $ 34 $ 42 The following table provides reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Derivatives (net) Three Months Ended March 31, (in millions) 2023 2022 Balance at beginning of period $ 34 $ 24 Purchases, sales, issuances and settlements: Settlements (20) (7) Total losses included on the Condensed Consolidated Balance Sheet (2) (7) Balance at end of period $ 12 $ 10 DUKE ENERGY CAROLINAS The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. March 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 69 $ 69 $ — $ — NDTF equity securities 3,677 3,636 — 41 NDTF debt securities 1,329 372 957 — Derivative assets 80 — 80 — Total assets 5,155 4,077 1,037 41 Derivative liabilities (201) — (201) — Net assets $ 4,954 $ 4,077 $ 836 $ 41 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 117 $ 117 $ — $ — NDTF equity securities 3,367 3,325 — 42 NDTF debt securities 1,298 323 975 — Derivative assets 330 — 330 — Total assets 5,112 3,765 1,305 42 Derivative liabilities (127) — (127) — Net assets $ 4,985 $ 3,765 $ 1,178 $ 42 PROGRESS ENERGY The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. March 31, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 92 $ 92 $ — $ 98 $ 98 $ — NDTF equity securities 2,690 2,690 — 2,504 2,504 — NDTF debt securities 1,266 450 816 1,252 457 795 Other debt securities 25 — 25 25 — 25 Other cash and cash equivalents 8 8 — 11 11 — Derivative assets 88 — 88 248 — 248 Total assets 4,169 3,240 929 4,138 3,070 1,068 Derivative liabilities (153) — (153) (66) — (66) Net assets $ 4,016 $ 3,240 $ 776 $ 4,072 $ 3,070 $ 1,002 DUKE ENERGY PROGRESS The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. March 31, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 72 $ 72 $ — $ 56 $ 56 $ — NDTF equity securities 2,590 2,590 — 2,411 2,411 — NDTF debt securities 977 219 758 963 225 738 Other cash and cash equivalents 7 7 — 9 9 — Derivative assets 82 — 82 230 — 230 Total assets 3,728 2,888 840 3,669 2,701 968 Derivative liabilities (149) — (149) (48) — (48) Net assets $ 3,579 $ 2,888 $ 691 $ 3,621 $ 2,701 $ 920 DUKE ENERGY FLORIDA The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. March 31, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 20 $ 20 $ — $ 42 $ 42 $ — NDTF equity securities 100 100 — 93 93 — NDTF debt securities 289 231 58 289 232 57 Other debt securities 25 — 25 25 — 25 Other cash and cash equivalents — — — 1 1 — Derivative assets 6 — 6 17 — 17 Total assets 440 351 89 467 368 99 Derivative liabilities (3) — (3) (19) — (19) Net assets $ 437 $ 351 $ 86 $ 448 $ 368 $ 80 DUKE ENERGY OHIO The recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets were not material at March 31, 2023, and December 31, 2022. DUKE ENERGY INDIANA The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. March 31, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Level 3 Total Fair Value Level 1 Level 2 Level 3 Other equity securities $ 85 $ 85 $ — $ — $ 79 $ 79 $ — $ — Other debt securities 64 — 64 — 60 — 60 — Other cash and cash equivalents 1 1 — — 1 1 — — Derivative assets 11 — — 11 110 — 81 29 Total assets 161 86 64 11 250 80 141 29 Derivative liabilities (28) (19) (9) — (16) (16) — — Net assets $ 133 $ 67 $ 55 $ 11 $ 234 $ 64 $ 141 $ 29 The following table provides a reconciliation of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Derivatives (net) Three Months Ended March 31, (in millions) 2023 2022 Balance at beginning of period $ 29 $ 22 Purchases, sales, issuances and settlements: Settlements (19) (6) Total gains (losses) included on the Condensed Consolidated Balance Sheet 1 (6) Balance at end of period $ 11 $ 10 PIEDMONT The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. March 31, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 Derivative assets $ 1 $ 1 $ — $ — $ — $ — Derivative liabilities (144) — (144) (168) — (168) Net (liabilities) assets $ (143) $ 1 $ (144) $ (168) $ — $ (168) QUANTITATIVE INFORMATION ABOUT UNOBSERVABLE INPUTS The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3. March 31, 2023 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs 1 RTO auction pricing FTR price – per MWh (0.19) - 2.71 1.08 Duke Energy Indiana FTRs 11 RTO auction pricing FTR price – per MWh 0.03 - 14.88 2.63 Duke Energy Total Level 3 derivatives $ 12 December 31, 2022 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs $ 5 RTO auction pricing FTR price – per MWh $ 0.89 - $ 6.25 $ 3.35 Duke Energy Indiana FTRs 29 RTO auction pricing FTR price – per MWh 0.09 - 21.79 2.74 Duke Energy Total Level 3 derivatives $ 34 OTHER FAIR VALUE DISCLOSURES The fair value and book value of long-term debt, including current maturities, is summarized in the following table. Debt related to the Commercial Renewables Disposal Groups is now classified as held for sale and is excluded from the following disclosures. See Note 2 for further information. Estimates determined are not necessarily indicative of amounts that could have been settled in current markets. Fair value of long-term debt uses Level 2 measurements. March 31, 2023 December 31, 2022 (in millions) Book Value Fair Value Book Value Fair Value Duke Energy (a) $ 72,437 $ 66,455 $ 69,751 $ 61,986 Duke Energy Carolinas 15,105 14,176 14,266 12,943 Progress Energy 23,371 21,974 22,439 20,467 Duke Energy Progress 12,047 10,911 11,087 9,689 Duke Energy Florida 9,683 9,242 9,709 8,991 Duke Energy Ohio 3,991 3,768 3,245 2,927 Duke Energy Indiana 4,503 4,265 4,307 3,913 Piedmont 3,364 3,014 3,363 2,940 (a) Book value of long-term debt inc ludes $1.15 billion and $1.17 billion at March 31, 2023, and December 31, 2022, respectively, of net unamortized debt discount and premium of purchase accounting adjustments related to the mergers with Progress Energy and Piedmont that are excluded from fair value of long-term debt. At both March 31, 2023, and December 31, 2022, fair value of cash and cash equivalents, accounts and notes receivable, accounts payable, notes payable and commercial paper and nonrecourse notes payable of VIEs are not materially different from their carrying amounts because of the short-term nature of these instruments and/or because the stated rates approximate market rates.

Variable Interest Entities

Variable Interest Entities	3 Months Ended
Variable Interest Entities	Mar. 31, 2023
Variable Interest Entities [Abstract]
Variable Interest Entities	VARIABLE INTEREST ENTITIES CONSOLIDATED VIEs The obligations of the consolidated VIEs discussed in the following paragraphs are nonrecourse to the Duke Energy Registrants. The registrants have no requirement to provide liquidity to, purchase assets of or guarantee performance of these VIEs unless noted in the following paragraphs. No financial support was provided to any of the consolidated VIEs during the three months ended March 31, 2023, and the year ended December 31, 2022, or is expected to be provided in the future that was not previously contractually required. Receivables Financing – DERF/DEPR/DEFR DERF, DEPR and DEFR are bankruptcy remote, special purpose subsidiaries of Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively. DERF, DEPR and DEFR are wholly owned LLCs with separate legal existence from their parent companies, and their assets are not generally available to creditors of their parent companies. On a revolving basis, DERF, DEPR and DEFR buy certain accounts receivable arising from the sale of electricity and related services from their parent companies. DERF, DEPR and DEFR borrow amounts under credit facilities to buy these receivables. Borrowing availability from the credit facilities is limited to the amount of qualified receivables purchased, which generally exclude receivables past due more than a predetermined number of days and reserves for expected past-due balances. The sole source of funds to satisfy the related debt obligations is cash collections from the receivables. The most significant activity that impacts the economic performance of DERF, DEPR and DEFR are the decisions made to manage delinquent receivables. Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida are considered the primary beneficiaries and consolidate DERF, DEPR and DEFR, respectively, as they make those decisions. Receivables Financing – CRC CRC is a bankruptcy remote, special purpose entity indirectly owned by Duke Energy. On a revolving basis, CRC buys certain accounts receivable arising from the sale of electricity, natural gas and related services from Duke Energy Ohio and Duke Energy Indiana. CRC borrows amounts under a credit facility to buy the receivables from Duke Energy Ohio and Duke Energy Indiana. Borrowing availability from the credit facility is limited to the amount of qualified receivables sold to CRC, which generally exclude receivables past due more than a predetermined number of days and reserves for expected past-due balances. The sole source of funds to satisfy the related debt obligation is cash collections from the receivables. Amounts borrowed under the credit facility are reflected on Duke Energy's Condensed Consolidated Balance Sheets as Long-Term Debt. The proceeds Duke Energy Ohio and Duke Energy Indiana receive from the sale of receivables to CRC are approximately 75% cash and 25% in the form of a subordinated note from CRC. The subordinated note is a retained interest in the receivables sold. Depending on collection experience, additional equity infusions to CRC may be required by Duke Energy to maintain a minimum equity balance of $3 million. CRC is considered a VIE because (i) equity capitalization is insufficient to support its operations, (ii) power to direct the activities that most significantly impact the economic performance of the entity is not held by the equity holder and (iii) deficiencies in net worth of CRC are funded by Duke Energy. The most significant activities that impact the economic performance of CRC are decisions made to manage delinquent receivables. Duke Energy is considered the primary beneficiary and consolidates CRC as it makes these decisions. Neither Duke Energy Ohio nor Duke Energy Indiana consolidate CRC. Receivables Financing – Credit Facilities The following table summarizes the amounts and expiration dates of the credit facilities and associated restricted receivables described above. Duke Energy Duke Energy Duke Energy Duke Energy Carolinas Progress Florida (in millions) CRC DERF DEPR DEFR Expiration date February 2025 January 2025 April 2025 April 2024 Credit facility amount $ 350 $ 500 $ 400 $ 325 Amounts borrowed at March 31, 2023 350 500 400 250 Amounts borrowed at December 31, 2022 350 471 400 250 Restricted Receivables at March 31, 2023 784 782 654 443 Restricted Receivables at December 31, 2022 917 928 793 490 Nuclear Asset-Recovery Bonds – DEFPF DEFPF is a bankruptcy remote, wholly owned special purpose subsidiary of Duke Energy Florida. DEFPF was formed in 2016 for the sole purpose of issuing nuclear asset-recovery bonds to finance Duke Energy Florida's unrecovered regulatory asset related to Crystal River Unit 3. In 2016, DEFPF issued senior secured bonds and used the proceeds to acquire nuclear asset-recovery property from Duke Energy Florida. The nuclear asset-recovery property acquired includes the right to impose, bill, collect and adjust a non-bypassable nuclear asset-recovery charge from all Duke Energy Florida retail customers until the bonds are paid in full and all financing costs have been recovered. The nuclear asset-recovery bonds are secured by the nuclear asset-recovery property and cash collections from the nuclear asset-recovery charges are the sole source of funds to satisfy the debt obligation. The bondholders have no recourse to Duke Energy Florida. DEFPF is considered a VIE primarily because the equity capitalization is insufficient to support its operations. Duke Energy Florida has the power to direct the significant activities of the VIE as described above and therefore Duke Energy Florida is considered the primary beneficiary and consolidates DEFPF. The following table summarizes the impact of DEFPF on Duke Energy Florida's Condensed Consolidated Balance Sheets. (in millions) March 31, 2023 December 31, 2022 Receivables of VIEs $ 4 $ 6 Regulatory Assets: Current 55 55 Current Assets: Other 18 41 Other Noncurrent Assets: Regulatory assets 814 826 Current Liabilities: Other 2 9 Current maturities of long-term debt 57 56 Long-Term Debt 859 890 Storm Recovery Bonds – Duke Energy Carolinas NC Storm Funding and Duke Energy Progress NC Storm Funding Duke Energy Carolinas NC Storm Funding, LLC (DECNCSF) and Duke Energy Progress NC Storm Funding, LLC (DEPNCSF) are bankruptcy remote, wholly owned special purpose subsidiaries of Duke Energy Carolinas and Duke Energy Progress, respectively. These entities were formed in 2021 for the sole purpose of issuing storm recovery bonds to finance certain of Duke Energy Carolinas’ and Duke Energy Progress’ unrecovered regulatory assets related to storm costs. In November 2021, DECNCSF and DEPNCSF issued $237 million and $770 million of senior secured bonds, respectively and used the proceeds to acquire storm recovery property from Duke Energy Carolinas and Duke Energy Progress. The storm recovery property was created by state legislation and NCUC financing orders for the purpose of financing storm costs incurred in 2018 and 2019. The storm recovery property acquired includes the right to impose, bill, collect and adjust a non-bypassable charge from all Duke Energy Carolinas’ and Duke Energy Progress’ retail customers until the bonds are paid in full and all financing costs have been recovered. The storm recovery bonds are secured by the storm recovery property and cash collections from the storm recovery charges are the sole source of funds to satisfy the debt obligation. The bondholders have no recourse to Duke Energy Carolinas or Duke Energy Progress. DECNCSF and DEPNCSF are considered VIEs primarily because the equity capitalization is insufficient to support their operations. Duke Energy Carolinas and Duke Energy Progress have the power to direct the significant activities of the VIEs as described above and therefore Duke Energy Carolinas and Duke Energy Progress are considered the primary beneficiaries and consolidate DECNCSF and DEPNCSF, respectively. The following table summarizes the impact of these VIEs on Duke Energy Carolinas’ and Duke Energy Progress’ Consolidated Balance Sheets. March 31, 2023 December 31, 2022 Duke Energy Duke Energy Duke Energy Duke Energy (in millions) Carolinas Progress Carolinas Progress Regulatory Assets: Current $ 12 $ 39 $ 12 $ 39 Current Assets: Other 5 15 8 29 Other Noncurrent Assets: Regulatory assets 205 672 208 681 Other Noncurrent Assets: Other 1 4 1 2 Current Liabilities: Other 1 4 3 8 Current maturities of long-term debt 10 34 10 34 Long-Term Debt 213 697 219 714 NON-CONSOLIDATED VIEs The following tables summarize the impact of non-consolidated VIEs on the Condensed Consolidated Balance Sheets. March 31, 2023 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ 164 $ 221 Investments in equity method unconsolidated affiliates 49 — — Other noncurrent assets 46 — — Total assets $ 95 $ 164 $ 221 Other current liabilities 52 — — Other noncurrent liabilities 49 — — Total liabilities $ 101 $ — $ — Net (liabilities) assets $ (6) $ 164 $ 221 December 31, 2022 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ 198 $ 317 Investments in equity method unconsolidated affiliates 43 — — Other noncurrent assets 45 — — Total assets $ 88 $ 198 $ 317 Other current liabilities 59 — — Other noncurrent liabilities 47 — — Total liabilities $ 106 $ — $ — Net (liabilities) assets $ (18) $ 198 $ 317 The Duke Energy Registrants are not aware of any situations where the maximum exposure to loss significantly exceeds the carrying values shown above. Natural Gas Investments Duke Energy has investments in various joint ventures including pipeline and renewable natural gas projects. These entities are considered VIEs due to having insufficient equity to finance their own activities without subordinated financial support. Duke Energy does not have the power to direct the activities that most significantly impact the economic performance, the obligation to absorb losses or the right to receive benefits of these VIEs and therefore does not consolidate these entities. CRC See discussion under Consolidated VIEs for additional information related to CRC. Amounts included in Receivables from affiliated companies in the above table for Duke Energy Ohio and Duke Energy Indiana reflect their retained interest in receivables sold to CRC. These subordinated notes held by Duke Energy Ohio and Duke Energy Indiana are stated at fair value. The following table shows the gross and net receivables sold. Duke Energy Ohio Duke Energy Indiana (in millions) March 31, 2023 December 31, 2022 March 31, 2023 December 31, 2022 Receivables sold $ 369 $ 423 $ 426 $ 508 Less: Retained interests 164 198 221 317 Net receivables sold $ 205 $ 225 $ 205 $ 191 The following table shows sales and cash flows related to receivables sold. Duke Energy Ohio Duke Energy Indiana Three Months Ended Three Months Ended March 31, March 31, (in millions) 2023 2022 2023 2022 Sales Receivables sold $ 725 $ 663 $ 942 $ 782 Loss recognized on sale 9 3 10 4 Cash flows Cash proceeds from receivables sold $ 750 $ 674 $ 1,028 $ 795 Return received on retained interests 6 1 8 2 Cash flows from sales of receivables are reflected within Cash Flows From Operating Activities and Cash Flows from Investing Activities on Duke Energy Ohio’s and Duke Energy Indiana’s Condensed Consolidated Statements of Cash Flows.

Revenue

Revenue	3 Months Ended
Revenue	Mar. 31, 2023
Revenue from Contract with Customer [Abstract]
Revenue	REVENUE Duke Energy earns substantially all of its revenues through its reportable segments, EU&I and GU&I. Electric Utilities and Infrastructure EU&I earns the majority of its revenues through retail and wholesale electric service through the generation, transmission, distribution and sale of electricity. Duke Energy generally provides retail and wholesale electric service customers with their full electric load requirements or with supplemental load requirements when the customer has other sources of electricity. The majority of wholesale revenues are full requirements contracts where the customers purchase the substantial majority of their energy needs and do not have a fixed quantity of contractually required energy or capacity. As such, related forecasted revenues are considered optional purchases. Supplemental requirements contracts that include contracted blocks of energy and capacity at contractually fixed prices have the following estimated remaining performance obligations: Remaining Performance Obligations (in millions) 2023 2024 2025 2026 2027 Thereafter Total Progress Energy $ 43 $ 66 $ 7 $ 7 $ 7 $ 36 $ 166 Duke Energy Progress 6 8 — — — — 14 Duke Energy Florida 37 58 7 7 7 36 152 Duke Energy Indiana 10 16 17 15 7 5 70 Revenues for block sales are recognized monthly as energy is delivered and stand-ready service is provided, consistent with invoiced amounts and unbilled estimates. Gas Utilities and Infrastructure GU&I earns its revenue through retail and wholesale natural gas service through the transportation, distribution and sale of natural gas. Duke Energy generally provides retail and wholesale natural gas service customers with all natural gas load requirements. Additionally, while natural gas can be stored, substantially all natural gas provided by Duke Energy is consumed by customers simultaneously with receipt of delivery. Fixed-capacity payments under long-term contracts for the GU&I segment include minimum margin contracts and supply arrangements with municipalities and power generation facilities. Revenues for related sales are recognized monthly as natural gas is delivered and stand-ready service is provided, consistent with invoiced amounts and unbilled estimates. Estimated remaining performance obligations are as follows: Remaining Performance Obligations (in millions) 2023 2024 2025 2026 2027 Thereafter Total Piedmont $ 51 $ 62 $ 61 $ 51 $ 49 $ 241 $ 515 Other The remainder of Duke Energy’s operations is presented as Other, which does not include material revenues from contracts with customers. Disaggregated Revenues Disaggregated revenues are presented as follows: Three Months Ended March 31, 2023 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 2,851 $ 824 $ 1,421 $ 607 $ 814 $ 234 $ 372 $ — General 1,831 588 841 358 483 135 270 — Industrial 891 296 272 177 95 71 251 — Wholesale 550 135 348 319 29 9 58 — Other revenues 144 78 121 68 53 27 15 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 6,267 $ 1,921 $ 3,003 $ 1,529 $ 1,474 $ 476 $ 966 $ — Gas Utilities and Infrastructure Residential $ 507 $ — $ — $ — $ — $ 162 $ — $ 345 Commercial 233 — — — — 58 — 175 Industrial 47 — — — — 9 — 37 Power Generation — — — — — — — 23 Other revenues 40 — — — — 6 — 19 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 827 $ — $ — $ — $ — $ 235 $ — $ 599 Other Revenue from contracts with customers $ 7 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 7,101 $ 1,921 $ 3,003 $ 1,529 $ 1,474 $ 711 $ 966 $ 599 Other revenue sources (a) $ 175 $ 13 $ 45 $ 4 $ 36 $ (2) $ 9 $ 76 Total revenues $ 7,276 $ 1,934 $ 3,048 $ 1,533 $ 1,510 $ 709 $ 975 $ 675 Three Months Ended March 31, 2022 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 2,767 $ 831 $ 1,368 $ 624 $ 744 $ 211 $ 354 $ — General 1,604 544 726 325 401 116 218 — Industrial 772 276 270 194 76 35 192 — Wholesale 626 113 411 349 62 23 79 — Other revenues 202 111 211 139 72 21 (36) — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 5,971 $ 1,875 $ 2,986 $ 1,631 $ 1,355 $ 406 $ 807 $ — Gas Utilities and Infrastructure Residential $ 572 $ — $ — $ — $ — $ 149 $ — $ 423 Commercial 269 — — — — 64 — 204 Industrial 57 — — — — 7 — 50 Power Generation — — — — — — — 24 Other revenues 115 — — — — 6 — 93 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,013 $ — $ — $ — $ — $ 226 $ — $ 794 Other Revenue from contracts with customers $ 7 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 6,991 $ 1,875 $ 2,986 $ 1,631 $ 1,355 $ 632 $ 807 $ 794 Other revenue sources (a) $ 20 $ 13 $ 6 $ 1 $ — $ 6 $ 15 $ 11 Total revenues $ 7,011 $ 1,888 $ 2,992 $ 1,632 $ 1,355 $ 638 $ 822 $ 805 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues. Duke Energy adopted the new guidance for credit losses effective January 1, 2020, using the modified retrospective method of adoption, which does not require restatement of prior year reported results. The following table presents the reserve for credit losses for trade and other receivables based on adoption of the new standard. Three Months Ended March 31, 2022 and 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at December 31, 2021 $ 121 $ 42 $ 36 $ 21 $ 16 $ 4 $ 3 $ 15 Write-Offs (23) (9) (10) (2) (8) — — (1) Credit Loss Expense 24 5 12 4 8 — — 3 Other Adjustments 17 14 13 8 5 — — — Balance at March 31, 2022 $ 139 $ 52 $ 51 $ 31 $ 21 $ 4 $ 3 $ 17 Balance at December 31, 2022 $ 216 $ 68 $ 81 $ 44 $ 36 $ 6 $ 4 $ 14 Write-Offs (42) (20) (22) (9) (12) — — (1) Credit Loss Expense 16 7 6 1 5 1 — 1 Other Adjustments 24 15 10 9 1 — — — Balance at March 31, 2023 $ 214 $ 70 $ 75 $ 45 $ 30 $ 7 $ 4 $ 14 Trade and other receivables are evaluated based on an estimate of the risk of loss over the life of the receivable and current and historical conditions using supportable assumptions. Management evaluates the risk of loss for trade and other receivables by comparing the historical write-off amounts to total revenue over a specified period. Historical loss rates are adjusted due to the impact of current conditions, as well as forecasted conditions over a reasonable time period. The calculated write-off rate can be applied to the receivable balance for which an established reserve does not already exist. Management reviews the assumptions and risk of loss periodically for trade and other receivables. The aging of trade receivables is presented in the table below. March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Revenue (a)(b) $ 1,070 $ 408 $ 284 $ 178 $ 106 $ 3 $ 20 $ 57 Current 2,018 519 892 476 414 14 46 168 1-31 days past due 254 64 103 68 35 5 9 18 31-61 days past due 148 32 83 72 11 5 2 10 61-91 days past due 33 9 13 8 5 2 1 2 91+ days past due 217 60 65 24 41 48 16 3 Deferred Payment Arrangements (c) 144 46 51 32 19 4 — 1 Trade and Other Receivables $ 3,884 $ 1,138 $ 1,491 $ 858 $ 631 $ 81 $ 94 $ 259 December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Revenue (a)(b) $ 1,457 $ 486 $ 355 $ 232 $ 123 $ 20 $ 28 $ 160 Current 2,347 577 1,059 637 417 15 52 265 1-31 days past due 261 96 60 15 45 5 17 15 31-61 days past due 123 23 61 49 12 6 2 3 61-91 days past due 74 25 18 9 9 3 11 2 91+ days past due 209 70 74 27 47 26 6 4 Deferred Payment Arrangements (c) 160 57 62 35 27 4 — 1 Trade and Other Receivables $ 4,631 $ 1,334 $ 1,689 $ 1,004 $ 680 $ 79 $ 116 $ 450 (a) Unbilled revenues are recognized by applying customer billing rates to the estimated volumes of energy or natural gas delivered but not yet billed and are included within Receivables and Receivables of VIEs on the Condensed Consolidated Balance Sheets. (b) Duke Energy Ohio and Duke Energy Indiana sell, on a revolving basis, nearly all of their retail accounts receivable, including receivables for unbilled revenues, to an affiliate, CRC, and account for the transfers of receivables as sales. Accordingly, the receivables sold are not reflected on the Condensed Consolidated Balance Sheets of Duke Energy Ohio and Duke Energy Indiana. See Note 12 for further information. These receivables for unbilled revenues are $103 million and $195 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of March 31, 2023, and $148 million and $260 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of December 31, 2022. (c) Due to ongoing financial hardships impacting customers, Duke Energy has permitted customers to defer payment of past-due amounts through installment payment plans.

Stockholders' Equity

Stockholders' Equity	3 Months Ended
Stockholders' Equity	Mar. 31, 2023
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS' EQUITYBasic EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the weighted average number of common shares outstanding during the period. Diluted EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the diluted weighted average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if securities or other agreements to issue common stock, such as equity forward sale agreements, were exercised or settled. Duke Energy’s participating securities are restricted stock units that are entitled to dividends declared on Duke Energy common stock during the restricted stock unit’s vesting periods. Dividends declared on preferred stock are recorded on the Condensed Consolidated Statements of Operations as a reduction of net income to arrive at net income available to Duke Energy common stockholders. Dividends accumulated on preferred stock are an adjustment to net income used in the calculation of basic and diluted EPS. The following table presents Duke Energy’s basic and diluted EPS calculations, the weighted average number of common shares outstanding and common and preferred share dividends declared. Three Months Ended March 31, (in millions, except per share amounts) 2023 2022 Net income available to Duke Energy common stockholders $ 765 $ 818 Less: (Loss) Income from discontinued operations attributable to Duke Energy common stockholders (145) 12 Accumulated preferred stock dividends adjustment 12 12 Less: Impact of participating securities 1 1 Income from continuing operations available to Duke Energy common stockholders $ 921 $ 817 Loss from discontinued operations, net of tax $ (209) $ (15) Add: Loss attributable to NCI 64 27 (Loss) Income from discontinued operations attributable to Duke Energy common stockholders $ (145) $ 12 Weighted average common shares outstanding – basic and diluted 770 770 EPS from continuing operations available to Duke Energy common stockholders Basic and diluted $ 1.20 $ 1.06 (Loss) Earnings Per Share from discontinued operations attributable to Duke Energy common stockholders Basic and diluted $ (0.19) $ 0.02 Potentially dilutive items excluded from the calculation (a) 2 2 Dividends declared per common share $ 1.005 $ 0.985 Dividends declared on Series A preferred stock per depositary share (b) $ 0.359 $ 0.359 Dividends declared on Series B preferred stock per share (c) $ 24.375 $ 24.375 (a) Performance stock awards were not included in the dilutive securities calculation because the performance measures related to the awards had not been met. (b) 5.75% Series A Cumulative Redeemable Perpetual Preferred Stock dividends are payable quarterly in arrears on the 16th day of March, June, September and December. The preferred stock has a $25 liquidation preference per depositary share. (c) 4.875% Series B Fixed-Rate Reset Cumulative Redeemable Perpetual Preferred Stock dividends are payable semiannually in arrears on the 16th day of March and September. The preferred stock has a $1,000 liquidation preference per share.

Employee Benefit Plans

Employee Benefit Plans	3 Months Ended
Employee Benefit Plans	Mar. 31, 2023
Retirement Benefits [Abstract]
Employee Benefit Plans	EMPLOYEE BENEFIT PLANS DEFINED BENEFIT RETIREMENT PLANS Duke Energy and certain subsidiaries maintain, and the Subsidiary Registrants participate in, qualified and non-qualified, non-contributory defined benefit retirement plans. Duke Energy's policy is to fund amounts on an actuarial basis to provide assets sufficient to meet benefit payments to be paid to plan participants. QUALIFIED PENSION PLANS The following tables include the components of net periodic pension costs for qualified pension plans. Three Months Ended March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 30 $ 10 $ 9 $ 5 $ 3 $ 1 $ 1 $ 1 Interest cost on projected benefit obligation 86 21 27 12 14 4 7 2 Expected return on plan assets (147) (40) (50) (23) (26) (6) (10) (5) Amortization of actuarial loss 2 — 1 — 1 — 1 — Amortization of prior service credit (3) — — — — — — (2) Amortization of settlement charges 5 2 1 1 — — — 1 Net periodic pension costs $ (27) $ (7) $ (12) $ (5) $ (8) $ (1) $ (1) $ (3) Three Months Ended March 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 40 $ 12 $ 12 $ 7 $ 4 $ 1 $ 2 $ 1 Interest cost on projected benefit obligation 58 14 18 8 10 3 5 2 Expected return on plan assets (140) (38) (46) (22) (24) (5) (9) (6) Amortization of actuarial loss 24 5 6 3 3 1 2 2 Amortization of prior service credit (5) (1) — — — — — (2) Amortization of settlement charges 2 1 1 — — — — — Net periodic pension costs $ (21) $ (7) $ (9) $ (4) $ (7) $ — $ — $ (3) NON-QUALIFIED PENSION PLANS Net periodic pension costs for non-qualified pension plans were not material for the three months ended March 31, 2023, and 2022. OTHER POST-RETIREMENT BENEFIT PLANS Net periodic costs for OPEB plans were not material for the three months ended March 31, 2023, and 2022.

Income Taxes

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES EFFECTIVE TAX RATES The ETRs from continuing operations for each of the Duke Energy Registrants are included in the following table. Three Months Ended March 31, 2023 2022 Duke Energy 13.8 % 2.9 % Duke Energy Carolinas 11.4 % 7.4 % Progress Energy 16.7 % 15.9 % Duke Energy Progress 14.6 % 14.0 % Duke Energy Florida 19.9 % 20.1 % Duke Energy Ohio 16.7 % (266.7) % Duke Energy Indiana 17.2 % 31.9 % Piedmont 17.7 % 13.4 % The increase in the ETR for Duke Energy for the three months ended March 31, 2023, was primarily due to a decrease in the amortization of excess deferred taxes. The increase in the ETR for Duke Energy Carolinas for the three months ended March 31, 2023, was primarily due to a decrease in the amortization of excess deferred taxes. The increase in the ETR for Duke Energy Ohio for the three months ended March 31, 2023, was primarily due to a decrease in the amortization of excess deferred taxes related to the MGP Settlement recorded in the prior year. The decrease in the ETR for Duke Energy Indiana for the three months ended March 31, 2023, was primarily due to the coal ash impairment in the prior year, based on the Indiana Supreme Court Opinion. The increase in the ETR for Piedmont for the three months ended March 31, 2023, was primarily due to a decrease in the amortization of excess deferred taxes.

Subsequent Events

Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2023
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTSFor information on subsequent events related to regulatory matters, commitments and contingencies, and debt and credit facilities, see Notes 4, 5 and 6, respectively.

Organization and Basis of Pre_2

Organization and Basis of Presentation (Policy)	3 Months Ended
Organization and Basis of Presentation (Policy)	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION These Condensed Consolidated Financial Statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Regulation S-X. Accordingly, these Condensed Consolidated Financial Statements do not include all information and notes required by GAAP for annual financial statements and should be read in conjunction with the Consolidated Financial Statements in the Duke Energy's Annual Report on Form 10-K for the year ended December 31, 2022. The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Condensed Consolidated Financial Statements. However, none of the registrants make any representations as to information related solely to Duke Energy or the subsidiaries of Duke Energy other than itself. These Condensed Consolidated Financial Statements, in the opinion of the respective companies’ management, reflect all normal recurring adjustments necessary to fairly present the financial position and results of operations of each of the Duke Energy Registrants. Amounts reported in Duke Energy’s interim Condensed Consolidated Statements of Operations and each of the Subsidiary Registrants’ interim Condensed Consolidated Statements of Operations and Comprehensive Income are not necessarily indicative of amounts expected for the respective annual periods due to effects of seasonal temperature variations on energy consumption, regulatory rulings, timing of maintenance on electric generating units, changes in mark-to-market valuations, changing commodity prices and other factors. In preparing financial statements that conform to GAAP, management must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.
Basis of Consolidation and Noncontrolling Interest	BASIS OF CONSOLIDATION These Condensed Consolidated Financial Statements include, after eliminating intercompany transactions and balances, the accounts of the Duke Energy Registrants and subsidiaries or VIEs where the respective Duke Energy Registrants have control. See Note 12 for additional information on VIEs. These Condensed Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities. NONCONTROLLING INTEREST Duke Energy maintains a controlling financial interest in certain less than wholly owned nonregulated subsidiaries. As a result, Duke Energy consolidates these subsidiaries and presents the third-party investors' portion of Duke Energy's net income (loss), net assets and comprehensive income (loss) as noncontrolling interest. Noncontrolling interest is included as a component of equity on the Condensed Consolidated Balance Sheets. Operating agreements of Duke Energy's subsidiaries with noncontrolling interest allocate profit and loss based on their pro rata shares of the ownership interest in the respective subsidiary. Therefore, Duke Energy allocates net income or loss and other comprehensive income or loss of these subsidiaries to the owners based on their pro rata shares.
Discontinued Operations	Discontinued Operations Duke Energy has elected to present cash flows of discontinued operations combined with cash flows of continuing operations. Unless otherwise noted, the notes to these condensed consolidated financial statements exclude amounts related to discontinued operations for all periods presented. For the three months ended March 31, 2023, and 2022, the Loss From Discontinued Operations, net of tax on Duke Energy's Condensed Consolidated Statements of Operations includes amounts related to noncontrolling interests. A portion of Noncontrolling interests on Duke Energy's Condensed Consolidated Balance Sheets relates to discontinued operations for the periods presented. See Note 2 for discussion of discontinued operations related to the Commercial Renewables Disposal Groups.
Cash, Cash Equivalents, and Restricted Cash	CASH, CASH EQUIVALENTS AND RESTRICTED CASHDuke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. See Notes 10 and 12 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Condensed Consolidated Balance Sheets.
New Accounting Standards	NEW ACCOUNTING STANDARDS No new accounting standards were adopted by the Duke Energy Registrants in 2023.
Environmental Costs	Liabilities are recorded when losses become probable and are reasonably estimable.Costs are typically expensed as Operation, maintenance and other on the Condensed Consolidated Statements of Operations unless regulatory recovery of the costs is deemed probable.
Derivatives	Duke Energy’s interest rate swaps for its regulated operations employ regulatory accounting. With regulatory accounting, the mark-to-market gains or losses on the swaps are deferred as regulatory liabilities or regulatory assets, respectively. Regulatory assets and liabilities are amortized consistent with the treatment of the related costs in the ratemaking process. The accrual of interest on the swaps is recorded as Interest Expense on the Duke Energy Registrant's Condensed Consolidated Statements of Operations and Comprehensive Income. Undesignated Contracts Undesignated contracts primarily include contracts not designated as a hedge because they are accounted for under regulatory accounting or contracts that do not qualify for hedge accounting. For the Subsidiary Registrants, bulk power electricity and natural gas purchases flow through fuel adjustment clauses, formula-based contracts or other cost-sharing mechanisms. Differences between the costs included in rates and the incurred costs, including undesignated derivative contracts, are largely deferred as regulatory assets or regulatory liabilities. Piedmont policies allow for the use of financial instruments to hedge commodity price risks. The strategy and objective of these hedging programs are to use the financial instruments to reduce natural gas cost volatility for customers.
Investments	As a result, the ability to hold investments in unrealized loss positions is outside the control of the Duke Energy Registrants. Accordingly, all unrealized losses associated with debt securities within the Investment Trusts are recognized immediately and deferred to regulatory accounts where appropriate.Unrealized gains and losses on all other AFS securities are included in other comprehensive income until realized, unless it is determined the carrying value of an investment has a credit loss. The Duke Energy Registrants analyze all investment holdings each reporting period to determine whether a decline in fair value is related to a credit loss. If a credit loss exists, the unrealized credit loss is included in earnings.
Revenue from Contract with Customer	Duke Energy earns substantially all of its revenues through its reportable segments, EU&I and GU&I.
Earnings Per Share	Basic EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the weighted average number of common shares outstanding during the period. Diluted EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the diluted weighted average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if securities or other agreements to issue common stock, such as equity forward sale agreements, were exercised or settled. Duke Energy’s participating securities are restricted stock units that are entitled to dividends declared on Duke Energy common stock during the restricted stock unit’s vesting periods. Dividends declared on preferred stock are recorded on the Condensed Consolidated Statements of Operations as a reduction of net income to arrive at net income available to Duke Energy common stockholders. Dividends accumulated on preferred stock are an adjustment to net income used in the calculation of basic and diluted EPS.

Organization and Basis of Pre_3

Organization and Basis of Presentation (Tables)	3 Months Ended
Organization and Basis of Presentation (Tables)	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Cash, Cash Equivalents and Restricted Cash	The following table presents the components of cash, cash equivalents and restricted cash included in the Condensed Consolidated Balance Sheets. March 31, 2023 December 31, 2022 Duke Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Duke Energy Progress Energy Energy Energy Carolinas Energy Progress Florida Energy (a) Carolinas Energy Progress Florida Current Assets Cash and cash equivalents $ 451 $ 24 $ 93 $ 50 $ 26 $ 409 $ 44 $ 108 $ 49 $ 45 Other 42 5 37 14 18 82 8 74 28 41 Other Noncurrent Assets Other 11 1 4 4 — 11 1 2 2 — Total cash, cash equivalents and restricted cash $ 504 $ 30 $ 134 $ 68 $ 44 $ 502 $ 53 $ 184 $ 79 $ 86
Schedule of Utility Inventory	The components of inventory are presented in the tables below. March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Materials and supplies $ 2,739 $ 948 $ 1,273 $ 842 $ 431 $ 116 $ 355 $ 12 Coal 772 309 233 128 105 29 202 — Natural gas, oil and other fuel 354 46 206 112 94 12 3 87 Total inventory $ 3,865 $ 1,303 $ 1,712 $ 1,082 $ 630 $ 157 $ 560 $ 99 December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Materials and supplies $ 2,604 $ 876 $ 1,232 $ 819 $ 413 $ 105 $ 342 $ 12 Coal 620 253 190 99 91 34 144 — Natural gas, oil and other fuel 360 35 157 88 69 5 3 160 Total inventory $ 3,584 $ 1,164 $ 1,579 $ 1,006 $ 573 $ 144 $ 489 $ 172
Schedule Of Accounts Payable Finance Programs	The following table represents the changes in confirmed obligations outstanding for the three months ended March 31, 2023, and 2022. Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Confirmed obligations outstanding at the December 31, 2021 $ 19 $ — $ 9 $ — $ 9 $ 6 $ — $ 4 Invoices confirmed during the period 31 2 11 2 9 6 2 11 Confirmed invoices paid during the period (31) (1) (11) (1) (10) (8) (1) (10) Confirmed obligations outstanding at March 31, 2022 $ 19 $ 1 $ 9 $ 1 $ 8 $ 4 $ 1 $ 5 Confirmed obligations outstanding at the December 31, 2022 $ 87 $ 6 $ 19 $ 8 $ 11 $ 5 $ — $ 57 Invoices confirmed during the period 59 10 22 11 11 1 — 25 Confirmed invoices paid during the period (94) (9) (26) (13) (13) (6) — (53) Confirmed obligations outstanding at March 31, 2023 $ 52 $ 7 $ 15 $ 6 $ 9 $ — $ — $ 29

Dispositions (Tables)

Dispositions (Tables)	3 Months Ended
Dispositions (Tables)	Mar. 31, 2023
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations	The following table presents the carrying values of the major classes of Assets held for sale and Liabilities associated with assets held for sale included in Duke Energy's Consolidated Balance Sheets. (in millions) March 31, 2023 December 31, 2022 Current Assets Held for Sale Cash and cash equivalents $ 12 $ 10 Receivables, net 114 107 Inventory 81 88 Other 167 151 Total current assets held for sale 374 356 Noncurrent Assets Held for Sale Property, Plant and Equipment Cost 6,334 6,444 Accumulated depreciation and amortization (1,651) (1,651) Net property, plant and equipment 4,683 4,793 Operating lease right-of-use assets, net 142 140 Investments in equity method unconsolidated affiliates 512 522 Other 201 179 Total other noncurrent assets held for sale 855 841 Total Assets Held for Sale $ 5,912 $ 5,990 Current Liabilities Associated with Assets Held for Sale Accounts payable $ 80 $ 122 Taxes accrued 9 17 Current maturities of long-term debt 275 276 Other 112 120 Total current liabilities associated with assets held for sale 476 535 Noncurrent Liabilities Associated with Assets Held for Sale Long-Term debt 1,184 1,188 Operating lease liabilities 150 150 Asset retirement obligations 196 190 Other 401 399 Total other noncurrent liabilities associated with assets held for sale 1,931 1,927 Total Liabilities Associated with Assets Held for Sale $ 2,407 $ 2,462 As of March 31, 2023, and December 31, 2022, the noncontrolling interest balance is $1.7 billion and $1.6 billion, respectively. The following table presents the results of the Commercial Renewables Disposal Groups, which are included in Loss from Discontinued Operations, net of tax in Duke Energy's Consolidated Statements of Operations. Three Months Ended March 31, (in millions) 2023 2022 Operating revenues $ 80 $ 121 Operation, maintenance and other 89 81 Depreciation and amortization (a) — 64 Property and other taxes 10 10 Other income and expenses, net (4) — Interest expense 31 19 Loss on disposal 220 — Loss before income taxes (274) (53) Income tax benefit (65) (38) Loss from discontinued operations $ (209) $ (15) Add: Net loss attributable to noncontrolling interest included in discontinued operations 64 27 Net income from discontinued operations attributable to Duke Energy Corporation $ (145) $ 12 (a) Upon meeting the criteria for assets held for sale, beginning in November 2022 depreciation and amortization expense were ceased. Three Months Ended March 31, (in millions) 2023 2022 Cash flows provided by (used in): Operating activities $ (54) $ 64 Investing activities (151) (88)

Business Segments (Tables)

Business Segments (Tables)	3 Months Ended
Business Segments (Tables)	Mar. 31, 2023
Segment Reporting Information [Line Items]
Business Segment Data	Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets. Three Months Ended March 31, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 6,381 $ 888 $ 7,269 $ 7 $ — $ 7,276 Intersegment revenues 17 23 40 24 (64) — Total revenues $ 6,398 $ 911 $ 7,309 $ 31 $ (64) $ 7,276 Segment income (loss) $ 791 $ 287 $ 1,078 $ (168) $ — $ 910 Less: Noncontrolling interests 43 Add: Preferred stock dividend 39 Discontinued operations (145) Net Income $ 761 Segment assets (a) $ 152,989 $ 16,217 $ 169,206 $ 9,627 $ — $ 178,833 Three Months Ended March 31, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Unaffiliated revenues $ 5,995 $ 1,009 $ 7,004 $ 7 $ — $ 7,011 Intersegment revenues 7 23 30 23 (53) — Total revenues $ 6,002 $ 1,032 $ 7,034 $ 30 $ (53) $ 7,011 Segment income (loss) (b) $ 723 $ 254 $ 977 $ (171) $ — $ 806 Less: Noncontrolling interests 37 Add: Preferred stock dividend 39 Discontinued operations 12 Net Income $ 820 (a) Other includes Assets Held for Sale balances related to the Commercial Renewables Disposal Groups. Refer to Note 2 for further information. (b) EU&I includes $211 million recorded within Impairment of assets and other charges, $46 million within Operating revenues and $22 million within Noncontrolling Interests related to the Duke Energy Indiana Supreme Court ruling on the Condensed Consolidated Statements of Operations. See Note 4 for additional information.
Duke Energy Ohio
Segment Reporting Information [Line Items]
Business Segment Data	Three Months Ended March 31, 2023 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 474 $ 235 $ 709 $ — $ — $ 709 Segment income (loss)/Net income $ 49 $ 52 $ 101 $ (1) $ — $ 100 Segment assets $ 7,553 $ 4,041 $ 11,594 $ 10 $ 89 $ 11,693 Three Months Ended March 31, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 412 $ 226 $ 638 $ — $ 638 Segment income (loss)/Net income $ 41 $ 38 $ 79 $ (2) $ 77

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
Commitments and Contingencies (Tables)	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Schedule of Reserves	The following table contains information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Other within Other Noncurrent Liabilities on the Condensed Consolidated Balance Sheets. (in millions) March 31, 2023 December 31, 2022 Reserves for Environmental Remediation Duke Energy $ 86 $ 84 Duke Energy Carolinas 23 22 Progress Energy 20 19 Duke Energy Progress 9 8 Duke Energy Florida 11 11 Duke Energy Ohio 33 33 Duke Energy Indiana 3 3 Piedmont 7 7

Debt and Credit Facilities (Tab

Debt and Credit Facilities (Tables)	3 Months Ended
Debt and Credit Facilities (Tables)	Mar. 31, 2023
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The following table summarizes significant debt issuances (in millions). Three Months Ended March 31, 2023 Duke Duke Duke Duke Maturity Interest Duke Energy Energy Energy Energy Issuance Date Date Rate Energy Carolinas Progress Ohio Indiana First Mortgage Bonds January 2023 (a) January 2033 4.95 % $ 900 $ 900 $ — $ — $ — January 2023 (a) January 2053 5.35 % 900 900 — — — March 2023 (b) March 2033 5.25 % 500 — 500 — — March 2023 (b) March 2053 5.35 % 500 — 500 — — March 2023 (c) April 2033 5.25 % 375 — — 375 — March 2023 (c) April 2053 5.65 % 375 — — 375 — March 2023 (d) April 2053 5.40 % 500 — — — 500 Total issuances $ 4,050 $ 1,800 $ 1,000 $ 750 $ 500 (a) Proceeds were used to repay $1 billion of maturities due March 2023, to pay down a portion of short-term debt and for general company purposes. (b) Proceeds will be used to repay $300 million of maturities due September 2023, to pay down a portion of short-term debt and for general company purposes. (c) Proceeds will be used to repay $300 million of maturities due September 2023 and a portion of the $100 million term loan due October 2023. Remaining proceeds will be used to repay a portion of short-term debt and for general corporate purposes. (d) Proceeds were used to repay the $300 million term loan due October 2023. Remaining proceeds will be used to repay a portion of short-term debt and for general company purposes. The following table shows the significant components of Current maturities of long-term debt on the Condensed Consolidated Balance Sheets. The Duke Energy Registrants currently anticipate satisfying these obligations with cash on hand and proceeds from additional borrowings. (in millions) Maturity Date Interest Rate March 31, 2023 Unsecured Debt Duke Energy (Parent) April 2023 2.875 % $ 350 Duke Energy (Parent) (a) June 2023 4.631 % 500 Duke Energy (Parent) October 2023 3.950 % 400 Duke Energy (Parent) Term Loan Facility (a) March 2024 5.385 % 1,000 Duke Energy Ohio (a) October 2023 4.879 % 150 First Mortgage Bonds Duke Energy Progress September 2023 3.375 % 300 Duke Energy Ohio September 2023 3.800 % 300 Other (b) 330 Current maturities of long-term debt $ 3,330 (a) Debt has a floating interest rate. (b) Includes finance lease obligations, amortizing debt, tax-exempt bonds with mandatory put options and small bullet maturities.
Schedule of Line of Credit Facilities	The table below includes the current borrowing sublimits and available capacity under these credit facilities. March 31, 2023 Duke Duke Duke Duke Duke Duke Duke Energy Energy Energy Energy Energy Energy (in millions) Energy (Parent) Carolinas Progress Florida Ohio Indiana Piedmont Facility size (a) $ 9,000 $ 2,275 $ 2,025 $ 900 $ 1,350 $ 700 $ 950 $ 800 Reduction to backstop issuances Commercial paper (b) (3,452) (494) (1,310) (150) (776) (93) (328) (301) Outstanding letters of credit (39) (27) (4) (1) (7) — — — Tax-exempt bonds (81) — — — — — (81) — Available capacity under the Master Credit Facility $ 5,428 $ 1,754 $ 711 $ 749 $ 567 $ 607 $ 541 $ 499 (a) Represents the sublimit of each borrower.

Related Party Transactions (Tab

Related Party Transactions (Tables)	3 Months Ended
Related Party Transactions (Tables)	Mar. 31, 2023
Related Party Transactions [Abstract]
Schedule of Related Party Transactions, Other Revenue and Expense	Material amounts related to transactions with related parties included on the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table. Three Months Ended March 31, (in millions) 2023 2022 Duke Energy Carolinas Corporate governance and shared service expenses (a) $ 196 $ 206 Indemnification coverages (b) 9 7 Joint Dispatch Agreement (JDA) revenue (c) 13 26 JDA expense (c) 29 94 Intercompany natural gas purchases (d) 5 13 Progress Energy Corporate governance and shared service expenses (a) $ 178 $ 196 Indemnification coverages (b) 12 11 JDA revenue (c) 29 94 JDA expense (c) 13 26 Intercompany natural gas purchases (d) 19 19 Duke Energy Progress Corporate governance and shared service expenses (a) $ 107 $ 119 Indemnification coverages (b) 5 5 JDA revenue (c) 29 94 JDA expense (c) 13 26 Intercompany natural gas purchases (d) 19 19 Duke Energy Florida Corporate governance and shared service expenses (a) $ 71 $ 77 Indemnification coverages (b) 7 6 Duke Energy Ohio Corporate governance and shared service expenses (a) $ 73 $ 82 Indemnification coverages (b) 1 1 Duke Energy Indiana Corporate governance and shared service expenses (a) $ 99 $ 124 Indemnification coverages (b) 2 2 Piedmont Corporate governance and shared service expenses (a) $ 38 $ 35 Indemnification coverages (b) 1 1 Intercompany natural gas sales (d) 24 32 Natural gas storage and transportation costs (e) 6 6 (a) The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, information technology, legal and accounting fees, as well as other third-party costs. These amounts are primarily recorded in Operation, maintenance and other and Impairment of assets and other charges on the Condensed Consolidated Statements of Operations and Comprehensive Income. (b) The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income. (c) Duke Energy Carolinas and Duke Energy Progress participate in a JDA, which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power and expenses from the purchase of power pursuant to the JDA are recorded in Operating Revenues and Fuel used in electric generation and purchased power, respectively, on the Condensed Consolidated Statements of Operations and Comprehensive Income. (d) Piedmont provides long-term natural gas delivery service to certain Duke Energy Carolinas and Duke Energy Progress natural gas-fired generation facilities. Piedmont records the sales in Operating Revenues, and Duke Energy Carolinas and Duke Energy Progress record the related purchases as a component of Fuel used in electric generation and purchased power on their respective Condensed Consolidated Statements of Operations and Comprehensive Income. Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Carolinas Energy Progress Florida Ohio Indiana Piedmont March 31, 2023 Intercompany income tax receivable $ — $ 21 $ — $ — $ — $ — $ — Intercompany income tax payable — — 2 30 15 24 38 December 31, 2022 Intercompany income tax receivable $ — $ 95 $ 36 $ 17 $ — $ — $ — Intercompany income tax payable 37 — — — 17 18 38

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	3 Months Ended
Derivatives and Hedging (Tables)	Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional Amounts of Outstanding Derivative Positions	The following tables show notional amounts of outstanding derivatives related to interest rate risk. March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Ohio Cash flow hedges $ 1,300 $ — $ — $ — $ — $ — $ — Undesignated contracts 2,077 800 1,050 250 800 200 27 Total notional amount $ 3,377 $ 800 $ 1,050 $ 250 $ 800 $ 200 $ 27 December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Ohio Cash flow hedges $ 500 $ — $ — $ — $ — $ — $ — Undesignated contracts 2,377 1,250 800 500 300 300 27 Total notional amount $ 2,877 $ 1,250 $ 800 $ 500 $ 300 $ 300 $ 27 The tables below include volumes of outstanding commodity derivatives. Amounts disclosed represent the absolute value of notional volumes of commodity contracts excluding NPNS. The Duke Energy Registrants have netted contractual amounts where offsetting purchase and sale contracts exist with identical delivery locations and times of delivery. Where all commodity positions are perfectly offset, no quantities are shown. March 31, 2023 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 5,984 — — — 720 5,264 — Natural gas (millions of dekatherms) 903 311 294 294 — 8 290 December 31, 2022 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) 14,086 — — — 1,820 12,266 — Natural gas (millions of dekatherms) 909 307 292 292 — 11 299 The following table shows Duke Energy's outstanding derivatives related to foreign currency risk at March 31, 2023. Fair Value Gain (Loss) (a) Pay Notional Receive Notional Receive Hedge (in millions) (in millions) Pay Rate (in millions) Rate Maturity Date Three months ended March 31, 2023 Fair value hedges $ 645 4.75 % 600 euros 3.10 % June 2028 $ 5 537 5.31 % 500 euros 3.85 % June 2034 5 Total notional amount $ 1,182 1,100 euros $ 10
Location And Fair Value Of Derivatives Recognized in the Condensed Consolidated Balance Sheets	The following tables show the fair value and balance sheet location of derivative instruments. Although derivatives subject to master netting arrangements are netted on the Condensed Consolidated Balance Sheets, the fair values presented below are shown gross and cash collateral on the derivatives has not been netted against the fair values shown. Derivative Assets March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 35 $ 12 $ 9 $ 9 $ — $ 1 $ 11 $ 1 Noncurrent 140 67 73 73 — — — — Total Derivative Assets – Commodity Contracts $ 175 $ 79 $ 82 $ 82 $ — $ 1 $ 11 $ 1 Interest Rate Contracts Designated as Hedging Instruments Current $ 86 $ — $ — $ — $ — $ — $ — $ — Not Designated as Hedging Instruments Current 7 1 6 — 6 — — — Total Derivative Assets – Interest Rate Contracts $ 93 $ 1 $ 6 $ — $ 6 $ — $ — $ — Total Derivative Assets $ 268 $ 80 $ 88 $ 82 $ 6 $ 1 $ 11 $ 1 Derivative Liabilities March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 264 $ 143 $ 90 $ 90 $ — $ — $ 19 $ 12 Noncurrent 237 54 51 51 — — — 132 Total Derivative Liabilities – Commodity Contracts $ 501 $ 197 $ 141 $ 141 $ — $ — $ 19 $ 144 Interest Rate Contracts Designated as Hedging Instruments Noncurrent 14 — — — — — — — Not Designated as Hedging Instruments Noncurrent 26 4 12 8 3 1 9 — Total Derivative Liabilities – Interest Rate Contracts $ 40 $ 4 $ 12 $ 8 $ 3 $ 1 $ 9 $ — Foreign Currency Contracts Designated as Hedging Instruments Current $ 18 $ — $ — $ — $ — $ — $ — $ — Noncurrent 44 — — — — — — — Total Derivative Liabilities – Foreign Currency Contracts $ 62 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 603 $ 201 $ 153 $ 149 $ 3 $ 1 $ 28 $ 144 Derivative Assets December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 265 $ 132 $ 99 $ 99 $ — $ 5 $ 29 $ — Noncurrent 213 104 108 108 — — — — Total Derivative Assets – Commodity Contracts $ 478 $ 236 $ 207 $ 207 $ — $ 5 $ 29 $ — Interest Rate Contracts Designated as Hedging Instruments Current $ 101 $ — $ — $ — $ — $ — $ — $ — Not Designated as Hedging Instruments Current $ 216 $ 94 $ 41 $ 23 $ 17 $ — $ 81 $ — Total Derivative Assets – Interest Rate Contracts $ 317 $ 94 $ 41 $ 23 $ 17 $ — $ 81 $ — Total Derivative Assets $ 795 $ 330 $ 248 $ 230 $ 17 $ 5 $ 110 $ — Derivative Liabilities December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 175 $ 96 $ 36 $ 18 $ 19 $ — $ 16 $ 27 Noncurrent 202 31 30 30 — — — 141 Total Derivative Liabilities – Commodity Contracts $ 377 $ 127 $ 66 $ 48 $ 19 $ — $ 16 $ 168 Interest Rate Contracts Not Designated as Hedging Instruments Noncurrent $ 2 $ — $ — $ — $ — $ 2 $ — $ — Total Derivative Liabilities – Interest Rate Contracts $ 2 $ — $ — $ — $ — $ 2 $ — $ — Foreign Currency Contracts Designated as Hedging Instruments Current $ 18 $ — $ — $ — $ — $ — $ — $ — Noncurrent 40 — — — — — — — Total Derivative Liabilities – Equity Securities Contracts $ 58 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 437 $ 127 $ 66 $ 48 $ 19 $ 2 $ 16 $ 168
Offsetting Assets	The following tables present the line items on the Condensed Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. The gross amounts offset in the tables below show the effect of these netting arrangements on financial position and include collateral posted to offset the net position. The amounts shown are calculated by counterparty. Accounts receivable or accounts payable may also be available to offset exposures in the event of bankruptcy. These amounts are not included in the tables below. Derivative Assets March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 128 $ 13 $ 15 $ 9 $ 6 $ 1 $ 11 $ 1 Gross amounts offset (19) (11) (8) (8) — — — — Net amounts presented in Current Assets: Other $ 109 $ 2 $ 7 $ 1 $ 6 $ 1 $ 11 $ 1 Noncurrent Gross amounts recognized $ 140 $ 67 $ 73 $ 73 $ — $ — $ — $ — Gross amounts offset (78) (38) (40) (40) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 62 $ 29 $ 33 $ 33 $ — $ — $ — $ — Derivative Liabilities March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 282 $ 143 $ 90 $ 90 $ — $ — $ 19 $ 12 Gross amounts offset (47) (20) (8) (8) — — (19) — Net amounts presented in Current Liabilities: Other $ 235 $ 123 $ 82 $ 82 $ — $ — $ — $ 12 Noncurrent Gross amounts recognized $ 321 $ 58 $ 63 $ 59 $ 3 $ 1 $ 9 $ 132 Gross amounts offset (83) (43) (40) (40) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 238 $ 15 $ 23 $ 19 $ 3 $ 1 $ 9 $ 132 Derivative Assets December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 582 $ 226 $ 140 $ 122 $ 17 $ 5 $ 110 $ — Gross amounts offset (64) (33) (30) (30) — — — — Net amounts presented in Current Assets: Other $ 518 $ 193 $ 110 $ 92 $ 17 $ 5 $ 110 $ — Noncurrent Gross amounts recognized $ 213 $ 104 $ 108 $ 108 $ — $ — $ — $ — Gross amounts offset (97) (40) (57) (57) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 116 $ 64 $ 51 $ 51 $ — $ — $ — $ — Derivative Liabilities December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 193 $ 96 $ 36 $ 18 $ 19 $ — $ 16 $ 27 Gross amounts offset (49) (15) (18) (18) — — (16) — Net amounts presented in Current Liabilities: Other $ 144 $ 81 $ 18 $ — $ 19 $ — $ — $ 27 Noncurrent Gross amounts recognized $ 244 $ 31 $ 30 $ 30 $ — $ 2 $ — $ 141 Gross amounts offset (59) (29) (30) (30) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 185 $ 2 $ — $ — $ — $ 2 $ — $ 141
Offsetting Liabilities	The following tables present the line items on the Condensed Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. The gross amounts offset in the tables below show the effect of these netting arrangements on financial position and include collateral posted to offset the net position. The amounts shown are calculated by counterparty. Accounts receivable or accounts payable may also be available to offset exposures in the event of bankruptcy. These amounts are not included in the tables below. Derivative Assets March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 128 $ 13 $ 15 $ 9 $ 6 $ 1 $ 11 $ 1 Gross amounts offset (19) (11) (8) (8) — — — — Net amounts presented in Current Assets: Other $ 109 $ 2 $ 7 $ 1 $ 6 $ 1 $ 11 $ 1 Noncurrent Gross amounts recognized $ 140 $ 67 $ 73 $ 73 $ — $ — $ — $ — Gross amounts offset (78) (38) (40) (40) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 62 $ 29 $ 33 $ 33 $ — $ — $ — $ — Derivative Liabilities March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 282 $ 143 $ 90 $ 90 $ — $ — $ 19 $ 12 Gross amounts offset (47) (20) (8) (8) — — (19) — Net amounts presented in Current Liabilities: Other $ 235 $ 123 $ 82 $ 82 $ — $ — $ — $ 12 Noncurrent Gross amounts recognized $ 321 $ 58 $ 63 $ 59 $ 3 $ 1 $ 9 $ 132 Gross amounts offset (83) (43) (40) (40) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 238 $ 15 $ 23 $ 19 $ 3 $ 1 $ 9 $ 132 Derivative Assets December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 582 $ 226 $ 140 $ 122 $ 17 $ 5 $ 110 $ — Gross amounts offset (64) (33) (30) (30) — — — — Net amounts presented in Current Assets: Other $ 518 $ 193 $ 110 $ 92 $ 17 $ 5 $ 110 $ — Noncurrent Gross amounts recognized $ 213 $ 104 $ 108 $ 108 $ — $ — $ — $ — Gross amounts offset (97) (40) (57) (57) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 116 $ 64 $ 51 $ 51 $ — $ — $ — $ — Derivative Liabilities December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 193 $ 96 $ 36 $ 18 $ 19 $ — $ 16 $ 27 Gross amounts offset (49) (15) (18) (18) — — (16) — Net amounts presented in Current Liabilities: Other $ 144 $ 81 $ 18 $ — $ 19 $ — $ — $ 27 Noncurrent Gross amounts recognized $ 244 $ 31 $ 30 $ 30 $ — $ 2 $ — $ 141 Gross amounts offset (59) (29) (30) (30) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 185 $ 2 $ — $ — $ — $ 2 $ — $ 141
Derivative Contracts with Contingent Credit Features	The following tables show information with respect to derivative contracts that are in a net liability position and contain objective credit risk-related payment provisions. March 31, 2023 Duke Duke Duke Energy Progress Energy (in millions) Energy Carolinas Energy Progress Aggregate fair value of derivatives in a net liability position $ 106 $ 54 $ 52 $ 52 Fair value of collateral already posted 10 10 — — Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered $ 96 $ 44 $ 52 $ 52 December 31, 2022 Duke Duke Duke Duke Energy Progress Energy Energy (in millions) Energy Carolinas Energy Progress Florida Aggregate fair value of derivatives in a net liability position $ 141 $ 86 $ 55 $ 48 $ 7 Fair value of collateral already posted — — — — — Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered $ 141 $ 86 $ 55 $ 48 $ 7

Investments in Debt and Equit_2

Investments in Debt and Equity Securities (Tables)	3 Months Ended
Investments in Debt and Equity Securities (Tables)	Mar. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 161 $ — $ — $ 215 Equity securities 4,048 60 6,367 3,658 105 5,871 Corporate debt securities 3 65 616 1 85 641 Municipal bonds 1 27 337 — 39 330 U.S. government bonds 9 85 1,495 2 112 1,423 Other debt securities — 15 147 — 18 156 Total NDTF Investments $ 4,061 $ 252 $ 9,123 $ 3,661 $ 359 $ 8,636 Other Investments Cash and cash equivalents $ — $ — $ 134 $ — $ — $ 22 Equity securities 25 11 137 21 16 128 Corporate debt securities — 10 87 — 12 84 Municipal bonds — 2 80 — 3 78 U.S. government bonds — — 69 — 2 62 Other debt securities — 2 42 — 3 41 Total Other Investments $ 25 $ 25 $ 549 $ 21 $ 36 $ 415 Total Investments $ 4,086 $ 277 $ 9,672 $ 3,682 $ 395 $ 9,051
Debt Securities, Available-for-sale	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 161 $ — $ — $ 215 Equity securities 4,048 60 6,367 3,658 105 5,871 Corporate debt securities 3 65 616 1 85 641 Municipal bonds 1 27 337 — 39 330 U.S. government bonds 9 85 1,495 2 112 1,423 Other debt securities — 15 147 — 18 156 Total NDTF Investments $ 4,061 $ 252 $ 9,123 $ 3,661 $ 359 $ 8,636 Other Investments Cash and cash equivalents $ — $ — $ 134 $ — $ — $ 22 Equity securities 25 11 137 21 16 128 Corporate debt securities — 10 87 — 12 84 Municipal bonds — 2 80 — 3 78 U.S. government bonds — — 69 — 2 62 Other debt securities — 2 42 — 3 41 Total Other Investments $ 25 $ 25 $ 549 $ 21 $ 36 $ 415 Total Investments $ 4,086 $ 277 $ 9,672 $ 3,682 $ 395 $ 9,051
Schedule of Realized Gain (Loss)	Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2023, and 2022, were as follows. Three Months Ended (in millions) March 31, 2023 March 31, 2022 FV-NI: Realized gains $ 26 $ 111 Realized losses 46 85 AFS: Realized gains 8 4 Realized losses 32 23
Investments Classified by Contractual Maturity Date	The table below summarizes the maturity date for debt securities. March 31, 2023 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Due in one year or less $ 115 $ 5 $ 96 $ 19 $ 77 $ 6 Due after one through five years 793 277 424 238 186 23 Due after five through 10 years 522 262 207 194 13 11 Due after 10 years 1,443 785 564 526 38 24 Total $ 2,873 $ 1,329 $ 1,291 $ 977 $ 314 $ 64
Duke Energy Carolinas
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 69 $ — $ — $ 117 Equity securities 2,375 29 3,677 2,147 51 3,367 Corporate debt securities 2 47 384 1 62 401 Municipal bonds — 5 56 — 10 64 U.S. government bonds 5 38 746 1 51 685 Other debt securities — 15 143 — 18 148 Total NDTF Investments $ 2,382 $ 134 $ 5,075 $ 2,149 $ 192 $ 4,782
Debt Securities, Available-for-sale	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 69 $ — $ — $ 117 Equity securities 2,375 29 3,677 2,147 51 3,367 Corporate debt securities 2 47 384 1 62 401 Municipal bonds — 5 56 — 10 64 U.S. government bonds 5 38 746 1 51 685 Other debt securities — 15 143 — 18 148 Total NDTF Investments $ 2,382 $ 134 $ 5,075 $ 2,149 $ 192 $ 4,782
Schedule of Realized Gain (Loss)	Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2023, and 2022, were as follows. Three Months Ended (in millions) March 31, 2023 March 31, 2022 FV-NI: Realized gains $ 18 $ 75 Realized losses 29 49 AFS: Realized gains 5 3 Realized losses 20 16
Progress Energy
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 92 $ — $ — $ 98 Equity securities 1,673 31 2,690 1,511 54 2,504 Corporate debt securities 1 18 232 — 23 240 Municipal bonds 1 22 281 — 29 266 U.S. government bonds 4 47 749 1 61 738 Other debt securities — — 4 — — 8 Total NDTF Investments $ 1,679 $ 118 $ 4,048 $ 1,512 $ 167 $ 3,854 Other Investments Cash and cash equivalents $ — $ — $ 8 $ — $ — $ 11 Municipal bonds — — 25 — — 25 Total Other Investments $ — $ — $ 33 $ — $ — $ 36 Total Investments $ 1,679 $ 118 $ 4,081 $ 1,512 $ 167 $ 3,890
Debt Securities, Available-for-sale	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 92 $ — $ — $ 98 Equity securities 1,673 31 2,690 1,511 54 2,504 Corporate debt securities 1 18 232 — 23 240 Municipal bonds 1 22 281 — 29 266 U.S. government bonds 4 47 749 1 61 738 Other debt securities — — 4 — — 8 Total NDTF Investments $ 1,679 $ 118 $ 4,048 $ 1,512 $ 167 $ 3,854 Other Investments Cash and cash equivalents $ — $ — $ 8 $ — $ — $ 11 Municipal bonds — — 25 — — 25 Total Other Investments $ — $ — $ 33 $ — $ — $ 36 Total Investments $ 1,679 $ 118 $ 4,081 $ 1,512 $ 167 $ 3,890
Schedule of Realized Gain (Loss)	Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2023, and 2022, were as follows. Three Months Ended (in millions) March 31, 2023 March 31, 2022 FV-NI: Realized gains $ 8 $ 36 Realized losses 17 36 AFS: Realized gains 3 1 Realized losses 12 6
Duke Energy Progress
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 72 $ — $ — $ 56 Equity securities 1,586 31 2,590 1,431 54 2,411 Corporate debt securities 1 17 222 — 22 230 Municipal bonds 1 22 281 — 29 266 U.S. government bonds 4 28 470 1 37 460 Other debt securities — — 4 — — 7 Total NDTF Investments $ 1,592 $ 98 $ 3,639 $ 1,432 $ 142 $ 3,430 Other Investments Cash and cash equivalents $ — $ — $ 7 $ — $ — $ 9 Total Other Investments $ — $ — $ 7 $ — $ — $ 9 Total Investments $ 1,592 $ 98 $ 3,646 $ 1,432 $ 142 $ 3,439
Debt Securities, Available-for-sale	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 72 $ — $ — $ 56 Equity securities 1,586 31 2,590 1,431 54 2,411 Corporate debt securities 1 17 222 — 22 230 Municipal bonds 1 22 281 — 29 266 U.S. government bonds 4 28 470 1 37 460 Other debt securities — — 4 — — 7 Total NDTF Investments $ 1,592 $ 98 $ 3,639 $ 1,432 $ 142 $ 3,430 Other Investments Cash and cash equivalents $ — $ — $ 7 $ — $ — $ 9 Total Other Investments $ — $ — $ 7 $ — $ — $ 9 Total Investments $ 1,592 $ 98 $ 3,646 $ 1,432 $ 142 $ 3,439
Schedule of Realized Gain (Loss)	Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2023, and 2022, were as follows. Three Months Ended (in millions) March 31, 2023 March 31, 2022 FV-NI: Realized gains $ 8 $ 36 Realized losses 17 35 AFS: Realized gains 3 1 Realized losses 12 5
Duke Energy Florida
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 20 $ — $ — $ 42 Equity securities 87 — 100 80 — 93 Corporate debt securities — 1 10 — 1 10 U.S. government bonds — 19 279 — 24 278 Other debt securities — — — — — 1 Total NDTF Investments (a) $ 87 $ 20 $ 409 $ 80 $ 25 $ 424 Other Investments Cash and cash equivalents $ — $ — $ — $ — $ — $ 1 Municipal bonds — — 25 — — 25 Total Other Investments $ — $ — $ 25 $ — $ — $ 26 Total Investments $ 87 $ 20 $ 434 $ 80 $ 25 $ 450 (a) During the three months ended March 31, 2023, and the year ended December 31, 2022, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3.
Debt Securities, Available-for-sale	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 20 $ — $ — $ 42 Equity securities 87 — 100 80 — 93 Corporate debt securities — 1 10 — 1 10 U.S. government bonds — 19 279 — 24 278 Other debt securities — — — — — 1 Total NDTF Investments (a) $ 87 $ 20 $ 409 $ 80 $ 25 $ 424 Other Investments Cash and cash equivalents $ — $ — $ — $ — $ — $ 1 Municipal bonds — — 25 — — 25 Total Other Investments $ — $ — $ 25 $ — $ — $ 26 Total Investments $ 87 $ 20 $ 434 $ 80 $ 25 $ 450 (a) During the three months ended March 31, 2023, and the year ended December 31, 2022, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3.
Duke Energy Indiana
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value Investments Cash and cash equivalents $ — $ — $ 1 $ — $ — $ 1 Equity securities 3 11 85 2 16 79 Corporate debt securities — — 9 — 1 8 Municipal bonds — 2 46 — 3 45 U.S. government bonds — — 9 — — 7 Total Investments $ 3 $ 13 $ 150 $ 2 $ 20 $ 140
Debt Securities, Available-for-sale	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS. March 31, 2023 December 31, 2022 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value Investments Cash and cash equivalents $ — $ — $ 1 $ — $ — $ 1 Equity securities 3 11 85 2 16 79 Corporate debt securities — — 9 — 1 8 Municipal bonds — 2 46 — 3 45 U.S. government bonds — — 9 — — 7 Total Investments $ 3 $ 13 $ 150 $ 2 $ 20 $ 140

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
Fair Value Measurements (Tables)	Mar. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. Derivative amounts in the tables below for all Duke Energy Registrants exclude cash collateral, which is disclosed in Note 9. See Note 10 for additional information related to investments by major security type for the Duke Energy Registrants. March 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 161 $ 161 $ — $ — $ — NDTF equity securities 6,367 6,326 — — 41 NDTF debt securities 2,595 822 1,773 — — Other equity securities 137 137 — — — Other debt securities 278 60 218 — — Other cash and cash equivalents 134 134 — — — Derivative assets 268 1 255 12 — Total assets 9,940 7,641 2,246 12 41 Derivative liabilities (603) (19) (584) — — Net assets (liabilities) $ 9,337 $ 7,622 $ 1,662 $ 12 $ 41 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 215 $ 215 $ — $ — $ — NDTF equity securities 5,871 5,829 — — 42 NDTF debt securities 2,550 780 1,770 — — Other equity securities 128 128 — — — Other debt securities 265 55 210 — — Other cash and cash equivalents 22 22 — — — Derivative assets 795 1 760 34 — Total assets 9,846 7,030 2,740 34 42 Derivative liabilities (437) (16) (421) — — Net assets (liabilities) $ 9,409 $ 7,014 $ 2,319 $ 34 $ 42
Reconciliation of Assets And Liabilities Measured At Fair Value on a Recurring Basis Using Unobservable Inputs	The following table provides reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Derivatives (net) Three Months Ended March 31, (in millions) 2023 2022 Balance at beginning of period $ 34 $ 24 Purchases, sales, issuances and settlements: Settlements (20) (7) Total losses included on the Condensed Consolidated Balance Sheet (2) (7) Balance at end of period $ 12 $ 10
Quantitative Information Table - Level 3	The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3. March 31, 2023 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs 1 RTO auction pricing FTR price – per MWh (0.19) - 2.71 1.08 Duke Energy Indiana FTRs 11 RTO auction pricing FTR price – per MWh 0.03 - 14.88 2.63 Duke Energy Total Level 3 derivatives $ 12 December 31, 2022 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Ohio FTRs $ 5 RTO auction pricing FTR price – per MWh $ 0.89 - $ 6.25 $ 3.35 Duke Energy Indiana FTRs 29 RTO auction pricing FTR price – per MWh 0.09 - 21.79 2.74 Duke Energy Total Level 3 derivatives $ 34
Schedule Of Long Term Debt Fair Value	The fair value and book value of long-term debt, including current maturities, is summarized in the following table. Debt related to the Commercial Renewables Disposal Groups is now classified as held for sale and is excluded from the following disclosures. See Note 2 for further information. Estimates determined are not necessarily indicative of amounts that could have been settled in current markets. Fair value of long-term debt uses Level 2 measurements. March 31, 2023 December 31, 2022 (in millions) Book Value Fair Value Book Value Fair Value Duke Energy (a) $ 72,437 $ 66,455 $ 69,751 $ 61,986 Duke Energy Carolinas 15,105 14,176 14,266 12,943 Progress Energy 23,371 21,974 22,439 20,467 Duke Energy Progress 12,047 10,911 11,087 9,689 Duke Energy Florida 9,683 9,242 9,709 8,991 Duke Energy Ohio 3,991 3,768 3,245 2,927 Duke Energy Indiana 4,503 4,265 4,307 3,913 Piedmont 3,364 3,014 3,363 2,940 (a) Book value of long-term debt inc ludes $1.15 billion and $1.17 billion
Duke Energy Carolinas
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. March 31, 2023 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 69 $ 69 $ — $ — NDTF equity securities 3,677 3,636 — 41 NDTF debt securities 1,329 372 957 — Derivative assets 80 — 80 — Total assets 5,155 4,077 1,037 41 Derivative liabilities (201) — (201) — Net assets $ 4,954 $ 4,077 $ 836 $ 41 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 117 $ 117 $ — $ — NDTF equity securities 3,367 3,325 — 42 NDTF debt securities 1,298 323 975 — Derivative assets 330 — 330 — Total assets 5,112 3,765 1,305 42 Derivative liabilities (127) — (127) — Net assets $ 4,985 $ 3,765 $ 1,178 $ 42
Progress Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. March 31, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 92 $ 92 $ — $ 98 $ 98 $ — NDTF equity securities 2,690 2,690 — 2,504 2,504 — NDTF debt securities 1,266 450 816 1,252 457 795 Other debt securities 25 — 25 25 — 25 Other cash and cash equivalents 8 8 — 11 11 — Derivative assets 88 — 88 248 — 248 Total assets 4,169 3,240 929 4,138 3,070 1,068 Derivative liabilities (153) — (153) (66) — (66) Net assets $ 4,016 $ 3,240 $ 776 $ 4,072 $ 3,070 $ 1,002
Duke Energy Progress
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. March 31, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 72 $ 72 $ — $ 56 $ 56 $ — NDTF equity securities 2,590 2,590 — 2,411 2,411 — NDTF debt securities 977 219 758 963 225 738 Other cash and cash equivalents 7 7 — 9 9 — Derivative assets 82 — 82 230 — 230 Total assets 3,728 2,888 840 3,669 2,701 968 Derivative liabilities (149) — (149) (48) — (48) Net assets $ 3,579 $ 2,888 $ 691 $ 3,621 $ 2,701 $ 920
Duke Energy Florida
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. March 31, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 20 $ 20 $ — $ 42 $ 42 $ — NDTF equity securities 100 100 — 93 93 — NDTF debt securities 289 231 58 289 232 57 Other debt securities 25 — 25 25 — 25 Other cash and cash equivalents — — — 1 1 — Derivative assets 6 — 6 17 — 17 Total assets 440 351 89 467 368 99 Derivative liabilities (3) — (3) (19) — (19) Net assets $ 437 $ 351 $ 86 $ 448 $ 368 $ 80
Duke Energy Indiana
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. March 31, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Level 3 Total Fair Value Level 1 Level 2 Level 3 Other equity securities $ 85 $ 85 $ — $ — $ 79 $ 79 $ — $ — Other debt securities 64 — 64 — 60 — 60 — Other cash and cash equivalents 1 1 — — 1 1 — — Derivative assets 11 — — 11 110 — 81 29 Total assets 161 86 64 11 250 80 141 29 Derivative liabilities (28) (19) (9) — (16) (16) — — Net assets $ 133 $ 67 $ 55 $ 11 $ 234 $ 64 $ 141 $ 29
Reconciliation of Assets And Liabilities Measured At Fair Value on a Recurring Basis Using Unobservable Inputs	The following table provides a reconciliation of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Derivatives (net) Three Months Ended March 31, (in millions) 2023 2022 Balance at beginning of period $ 29 $ 22 Purchases, sales, issuances and settlements: Settlements (19) (6) Total gains (losses) included on the Condensed Consolidated Balance Sheet 1 (6) Balance at end of period $ 11 $ 10
Piedmont
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. March 31, 2023 December 31, 2022 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 Derivative assets $ 1 $ 1 $ — $ — $ — $ — Derivative liabilities (144) — (144) (168) — (168) Net (liabilities) assets $ (143) $ 1 $ (144) $ (168) $ — $ (168)

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	3 Months Ended
Variable Interest Entities (Tables)	Mar. 31, 2023
VIE primary beneficiary
Variable Interest Entities [Line Items]
Schedule of Variable Interest Entities	The following table summarizes the amounts and expiration dates of the credit facilities and associated restricted receivables described above. Duke Energy Duke Energy Duke Energy Duke Energy Carolinas Progress Florida (in millions) CRC DERF DEPR DEFR Expiration date February 2025 January 2025 April 2025 April 2024 Credit facility amount $ 350 $ 500 $ 400 $ 325 Amounts borrowed at March 31, 2023 350 500 400 250 Amounts borrowed at December 31, 2022 350 471 400 250 Restricted Receivables at March 31, 2023 784 782 654 443 Restricted Receivables at December 31, 2022 917 928 793 490
VIE not primary beneficiary
Variable Interest Entities [Line Items]
Schedule of Variable Interest Entities	The following tables summarize the impact of non-consolidated VIEs on the Condensed Consolidated Balance Sheets. March 31, 2023 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ 164 $ 221 Investments in equity method unconsolidated affiliates 49 — — Other noncurrent assets 46 — — Total assets $ 95 $ 164 $ 221 Other current liabilities 52 — — Other noncurrent liabilities 49 — — Total liabilities $ 101 $ — $ — Net (liabilities) assets $ (6) $ 164 $ 221 December 31, 2022 Duke Energy Duke Duke Natural Gas Energy Energy (in millions) Investments Ohio Indiana Receivables from affiliated companies $ — $ 198 $ 317 Investments in equity method unconsolidated affiliates 43 — — Other noncurrent assets 45 — — Total assets $ 88 $ 198 $ 317 Other current liabilities 59 — — Other noncurrent liabilities 47 — — Total liabilities $ 106 $ — $ — Net (liabilities) assets $ (18) $ 198 $ 317
DEFPF \| VIE primary beneficiary
Variable Interest Entities [Line Items]
Schedule of Variable Interest Entities	The following table summarizes the impact of DEFPF on Duke Energy Florida's Condensed Consolidated Balance Sheets. (in millions) March 31, 2023 December 31, 2022 Receivables of VIEs $ 4 $ 6 Regulatory Assets: Current 55 55 Current Assets: Other 18 41 Other Noncurrent Assets: Regulatory assets 814 826 Current Liabilities: Other 2 9 Current maturities of long-term debt 57 56 Long-Term Debt 859 890
DECNCSF and DEPNCSF \| VIE primary beneficiary
Variable Interest Entities [Line Items]
Schedule of Variable Interest Entities	The following table summarizes the impact of these VIEs on Duke Energy Carolinas’ and Duke Energy Progress’ Consolidated Balance Sheets. March 31, 2023 December 31, 2022 Duke Energy Duke Energy Duke Energy Duke Energy (in millions) Carolinas Progress Carolinas Progress Regulatory Assets: Current $ 12 $ 39 $ 12 $ 39 Current Assets: Other 5 15 8 29 Other Noncurrent Assets: Regulatory assets 205 672 208 681 Other Noncurrent Assets: Other 1 4 1 2 Current Liabilities: Other 1 4 3 8 Current maturities of long-term debt 10 34 10 34 Long-Term Debt 213 697 219 714
CRC \| VIE not primary beneficiary
Variable Interest Entities [Line Items]
Schedule of Variable Interest Entities	The following table shows the gross and net receivables sold. Duke Energy Ohio Duke Energy Indiana (in millions) March 31, 2023 December 31, 2022 March 31, 2023 December 31, 2022 Receivables sold $ 369 $ 423 $ 426 $ 508 Less: Retained interests 164 198 221 317 Net receivables sold $ 205 $ 225 $ 205 $ 191 The following table shows sales and cash flows related to receivables sold. Duke Energy Ohio Duke Energy Indiana Three Months Ended Three Months Ended March 31, March 31, (in millions) 2023 2022 2023 2022 Sales Receivables sold $ 725 $ 663 $ 942 $ 782 Loss recognized on sale 9 3 10 4 Cash flows Cash proceeds from receivables sold $ 750 $ 674 $ 1,028 $ 795 Return received on retained interests 6 1 8 2

Revenue (Tables)

Revenue (Tables)	3 Months Ended
Revenue (Tables)	Mar. 31, 2023
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction	Supplemental requirements contracts that include contracted blocks of energy and capacity at contractually fixed prices have the following estimated remaining performance obligations: Remaining Performance Obligations (in millions) 2023 2024 2025 2026 2027 Thereafter Total Progress Energy $ 43 $ 66 $ 7 $ 7 $ 7 $ 36 $ 166 Duke Energy Progress 6 8 — — — — 14 Duke Energy Florida 37 58 7 7 7 36 152 Duke Energy Indiana 10 16 17 15 7 5 70 Remaining Performance Obligations (in millions) 2023 2024 2025 2026 2027 Thereafter Total Piedmont $ 51 $ 62 $ 61 $ 51 $ 49 $ 241 $ 515
Disaggregation of Revenue	Disaggregated revenues are presented as follows: Three Months Ended March 31, 2023 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 2,851 $ 824 $ 1,421 $ 607 $ 814 $ 234 $ 372 $ — General 1,831 588 841 358 483 135 270 — Industrial 891 296 272 177 95 71 251 — Wholesale 550 135 348 319 29 9 58 — Other revenues 144 78 121 68 53 27 15 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 6,267 $ 1,921 $ 3,003 $ 1,529 $ 1,474 $ 476 $ 966 $ — Gas Utilities and Infrastructure Residential $ 507 $ — $ — $ — $ — $ 162 $ — $ 345 Commercial 233 — — — — 58 — 175 Industrial 47 — — — — 9 — 37 Power Generation — — — — — — — 23 Other revenues 40 — — — — 6 — 19 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 827 $ — $ — $ — $ — $ 235 $ — $ 599 Other Revenue from contracts with customers $ 7 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 7,101 $ 1,921 $ 3,003 $ 1,529 $ 1,474 $ 711 $ 966 $ 599 Other revenue sources (a) $ 175 $ 13 $ 45 $ 4 $ 36 $ (2) $ 9 $ 76 Total revenues $ 7,276 $ 1,934 $ 3,048 $ 1,533 $ 1,510 $ 709 $ 975 $ 675 Three Months Ended March 31, 2022 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 2,767 $ 831 $ 1,368 $ 624 $ 744 $ 211 $ 354 $ — General 1,604 544 726 325 401 116 218 — Industrial 772 276 270 194 76 35 192 — Wholesale 626 113 411 349 62 23 79 — Other revenues 202 111 211 139 72 21 (36) — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 5,971 $ 1,875 $ 2,986 $ 1,631 $ 1,355 $ 406 $ 807 $ — Gas Utilities and Infrastructure Residential $ 572 $ — $ — $ — $ — $ 149 $ — $ 423 Commercial 269 — — — — 64 — 204 Industrial 57 — — — — 7 — 50 Power Generation — — — — — — — 24 Other revenues 115 — — — — 6 — 93 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,013 $ — $ — $ — $ — $ 226 $ — $ 794 Other Revenue from contracts with customers $ 7 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 6,991 $ 1,875 $ 2,986 $ 1,631 $ 1,355 $ 632 $ 807 $ 794 Other revenue sources (a) $ 20 $ 13 $ 6 $ 1 $ — $ 6 $ 15 $ 11 Total revenues $ 7,011 $ 1,888 $ 2,992 $ 1,632 $ 1,355 $ 638 $ 822 $ 805 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues.
Reserve for Credit Losses for Trade and Other Receivables	The following table presents the reserve for credit losses for trade and other receivables based on adoption of the new standard. Three Months Ended March 31, 2022 and 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at December 31, 2021 $ 121 $ 42 $ 36 $ 21 $ 16 $ 4 $ 3 $ 15 Write-Offs (23) (9) (10) (2) (8) — — (1) Credit Loss Expense 24 5 12 4 8 — — 3 Other Adjustments 17 14 13 8 5 — — — Balance at March 31, 2022 $ 139 $ 52 $ 51 $ 31 $ 21 $ 4 $ 3 $ 17 Balance at December 31, 2022 $ 216 $ 68 $ 81 $ 44 $ 36 $ 6 $ 4 $ 14 Write-Offs (42) (20) (22) (9) (12) — — (1) Credit Loss Expense 16 7 6 1 5 1 — 1 Other Adjustments 24 15 10 9 1 — — — Balance at March 31, 2023 $ 214 $ 70 $ 75 $ 45 $ 30 $ 7 $ 4 $ 14
Aging of Trade Receivables	The aging of trade receivables is presented in the table below. March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Revenue (a)(b) $ 1,070 $ 408 $ 284 $ 178 $ 106 $ 3 $ 20 $ 57 Current 2,018 519 892 476 414 14 46 168 1-31 days past due 254 64 103 68 35 5 9 18 31-61 days past due 148 32 83 72 11 5 2 10 61-91 days past due 33 9 13 8 5 2 1 2 91+ days past due 217 60 65 24 41 48 16 3 Deferred Payment Arrangements (c) 144 46 51 32 19 4 — 1 Trade and Other Receivables $ 3,884 $ 1,138 $ 1,491 $ 858 $ 631 $ 81 $ 94 $ 259 December 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Revenue (a)(b) $ 1,457 $ 486 $ 355 $ 232 $ 123 $ 20 $ 28 $ 160 Current 2,347 577 1,059 637 417 15 52 265 1-31 days past due 261 96 60 15 45 5 17 15 31-61 days past due 123 23 61 49 12 6 2 3 61-91 days past due 74 25 18 9 9 3 11 2 91+ days past due 209 70 74 27 47 26 6 4 Deferred Payment Arrangements (c) 160 57 62 35 27 4 — 1 Trade and Other Receivables $ 4,631 $ 1,334 $ 1,689 $ 1,004 $ 680 $ 79 $ 116 $ 450 (a) Unbilled revenues are recognized by applying customer billing rates to the estimated volumes of energy or natural gas delivered but not yet billed and are included within Receivables and Receivables of VIEs on the Condensed Consolidated Balance Sheets. (b) Duke Energy Ohio and Duke Energy Indiana sell, on a revolving basis, nearly all of their retail accounts receivable, including receivables for unbilled revenues, to an affiliate, CRC, and account for the transfers of receivables as sales. Accordingly, the receivables sold are not reflected on the Condensed Consolidated Balance Sheets of Duke Energy Ohio and Duke Energy Indiana. See Note 12 for further information. These receivables for unbilled revenues are $103 million and $195 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of March 31, 2023, and $148 million and $260 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of December 31, 2022. (c) Due to ongoing financial hardships impacting customers, Duke Energy has permitted customers to defer payment of past-due amounts through installment payment plans.

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
Stockholders' Equity (Tables)	Mar. 31, 2023
Equity [Abstract]
Schedule of Earnings Per Share	The following table presents Duke Energy’s basic and diluted EPS calculations, the weighted average number of common shares outstanding and common and preferred share dividends declared. Three Months Ended March 31, (in millions, except per share amounts) 2023 2022 Net income available to Duke Energy common stockholders $ 765 $ 818 Less: (Loss) Income from discontinued operations attributable to Duke Energy common stockholders (145) 12 Accumulated preferred stock dividends adjustment 12 12 Less: Impact of participating securities 1 1 Income from continuing operations available to Duke Energy common stockholders $ 921 $ 817 Loss from discontinued operations, net of tax $ (209) $ (15) Add: Loss attributable to NCI 64 27 (Loss) Income from discontinued operations attributable to Duke Energy common stockholders $ (145) $ 12 Weighted average common shares outstanding – basic and diluted 770 770 EPS from continuing operations available to Duke Energy common stockholders Basic and diluted $ 1.20 $ 1.06 (Loss) Earnings Per Share from discontinued operations attributable to Duke Energy common stockholders Basic and diluted $ (0.19) $ 0.02 Potentially dilutive items excluded from the calculation (a) 2 2 Dividends declared per common share $ 1.005 $ 0.985 Dividends declared on Series A preferred stock per depositary share (b) $ 0.359 $ 0.359 Dividends declared on Series B preferred stock per share (c) $ 24.375 $ 24.375 (a) Performance stock awards were not included in the dilutive securities calculation because the performance measures related to the awards had not been met. (b) 5.75% Series A Cumulative Redeemable Perpetual Preferred Stock dividends are payable quarterly in arrears on the 16th day of March, June, September and December. The preferred stock has a $25 liquidation preference per depositary share. (c) 4.875% Series B Fixed-Rate Reset Cumulative Redeemable Perpetual Preferred Stock dividends are payable semiannually in arrears on the 16th day of March and September. The preferred stock has a $1,000 liquidation preference per share.

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	3 Months Ended
Employee Benefit Plans (Tables)	Mar. 31, 2023
Qualified Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Components of Net Periodic Pension Costs	The following tables include the components of net periodic pension costs for qualified pension plans. Three Months Ended March 31, 2023 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 30 $ 10 $ 9 $ 5 $ 3 $ 1 $ 1 $ 1 Interest cost on projected benefit obligation 86 21 27 12 14 4 7 2 Expected return on plan assets (147) (40) (50) (23) (26) (6) (10) (5) Amortization of actuarial loss 2 — 1 — 1 — 1 — Amortization of prior service credit (3) — — — — — — (2) Amortization of settlement charges 5 2 1 1 — — — 1 Net periodic pension costs $ (27) $ (7) $ (12) $ (5) $ (8) $ (1) $ (1) $ (3) Three Months Ended March 31, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 40 $ 12 $ 12 $ 7 $ 4 $ 1 $ 2 $ 1 Interest cost on projected benefit obligation 58 14 18 8 10 3 5 2 Expected return on plan assets (140) (38) (46) (22) (24) (5) (9) (6) Amortization of actuarial loss 24 5 6 3 3 1 2 2 Amortization of prior service credit (5) (1) — — — — — (2) Amortization of settlement charges 2 1 1 — — — — — Net periodic pension costs $ (21) $ (7) $ (9) $ (4) $ (7) $ — $ — $ (3)

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
Income Taxes (Tables)	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Summary of Effective Tax Rates	The ETRs from continuing operations for each of the Duke Energy Registrants are included in the following table. Three Months Ended March 31, 2023 2022 Duke Energy 13.8 % 2.9 % Duke Energy Carolinas 11.4 % 7.4 % Progress Energy 16.7 % 15.9 % Duke Energy Progress 14.6 % 14.0 % Duke Energy Florida 19.9 % 20.1 % Duke Energy Ohio 16.7 % (266.7) % Duke Energy Indiana 17.2 % 31.9 % Piedmont 17.7 % 13.4 %

Organization and Basis of Pre_4

Organization and Basis of Presentation (Schedule of Cash and Cash Equivalents) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents		$ 409
Other Noncurrent Assets
Total cash, cash equivalents and restricted cash	$ 624	603	$ 1,020	$ 520
Duke Energy (Parent)
Current Assets
Cash and cash equivalents	451	409
Other	42	82
Other Noncurrent Assets
Other	11	11
Total cash, cash equivalents and restricted cash	504	502
Duke Energy Carolinas
Current Assets
Cash and cash equivalents	24	44
Other	5	8
Other Noncurrent Assets
Other	1	1
Total cash, cash equivalents and restricted cash	30	53	9	8
Progress Energy
Current Assets
Cash and cash equivalents	93	108
Other	37	74
Other Noncurrent Assets
Other	4	2
Total cash, cash equivalents and restricted cash	134	184	95	113
Duke Energy Progress
Current Assets
Cash and cash equivalents	50	49
Other	14	28
Other Noncurrent Assets
Other	4	2
Total cash, cash equivalents and restricted cash	68	79	59	39
Duke Energy Florida
Current Assets
Cash and cash equivalents	26	45
Other	18	41
Other Noncurrent Assets
Total cash, cash equivalents and restricted cash	$ 44	$ 86	$ 26	$ 62

Organization and Basis of Pre_5

Organization and Basis of Presentation (Schedule of Inventory) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Public Utilities, Inventory [Line Items]
Materials and supplies	$ 2,739	$ 2,604
Coal	772	620
Natural gas, oil and other fuel	354	360
Inventory	3,865	3,584
Duke Energy Carolinas
Public Utilities, Inventory [Line Items]
Materials and supplies	948	876
Coal	309	253
Natural gas, oil and other fuel	46	35
Inventory	1,303	1,164
Progress Energy
Public Utilities, Inventory [Line Items]
Materials and supplies	1,273	1,232
Coal	233	190
Natural gas, oil and other fuel	206	157
Inventory	1,712	1,579
Duke Energy Progress
Public Utilities, Inventory [Line Items]
Materials and supplies	842	819
Coal	128	99
Natural gas, oil and other fuel	112	88
Inventory	1,082	1,006
Duke Energy Florida
Public Utilities, Inventory [Line Items]
Materials and supplies	431	413
Coal	105	91
Natural gas, oil and other fuel	94	69
Inventory	630	573
Duke Energy Ohio
Public Utilities, Inventory [Line Items]
Materials and supplies	116	105
Coal	29	34
Natural gas, oil and other fuel	12	5
Inventory	157	144
Duke Energy Indiana
Public Utilities, Inventory [Line Items]
Materials and supplies	355	342
Coal	202	144
Natural gas, oil and other fuel	3	3
Inventory	560	489
Piedmont
Public Utilities, Inventory [Line Items]
Materials and supplies	12	12
Natural gas, oil and other fuel	87	160
Inventory	$ 99	$ 172

Organization and Basis of Pre_6

Organization and Basis of Presentation (Other Noncurrent Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Regulatory Asset [Line Items]
Other	$ 3,426	$ 3,400
Offshore Wind Arrangement
Regulatory Asset [Line Items]
Other	$ 150

Organization and Basis of Pre_7

Organization and Basis of Presentation (Confirmed Obligations) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Duke Energy (Parent)
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	$ 87	$ 19
Invoices confirmed during the period	59	31
Confirmed invoices paid during the period	(94)	(31)
Confirmed obligations at end of period	52	19
Duke Energy Carolinas
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	6
Invoices confirmed during the period	10	2
Confirmed invoices paid during the period	(9)	(1)
Confirmed obligations at end of period	7	1
Progress Energy
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	19	9
Invoices confirmed during the period	22	11
Confirmed invoices paid during the period	(26)	(11)
Confirmed obligations at end of period	15	9
Duke Energy Progress
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	8
Invoices confirmed during the period	11	2
Confirmed invoices paid during the period	(13)	(1)
Confirmed obligations at end of period	6	1
Duke Energy Florida
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	11	9
Invoices confirmed during the period	11	9
Confirmed invoices paid during the period	(13)	(10)
Confirmed obligations at end of period	9	8
Duke Energy Ohio
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	5	6
Invoices confirmed during the period	1	6
Confirmed invoices paid during the period	(6)	(8)
Confirmed obligations at end of period		4
Duke Energy Indiana
Contractual Obligations [Roll Forward]
Invoices confirmed during the period		2
Confirmed invoices paid during the period		(1)
Confirmed obligations at end of period		1
Piedmont
Contractual Obligations [Roll Forward]
Confirmed obligations at beginning of period	57	4
Invoices confirmed during the period	25	11
Confirmed invoices paid during the period	(53)	(10)
Confirmed obligations at end of period	$ 29	$ 5

Dispositions (Duke Energy Disco

Dispositions (Duke Energy Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss From Discontinued Operations, net of tax	$ (209)	$ (15)
Discontinued Operations, Held-for-sale \| Commercial Renewables
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss From Discontinued Operations, net of tax	$ (209)	$ (15)

Dispositions (Narrative) (Detai

Dispositions (Narrative) (Details) - Discontinued Operations, Held-for-sale - Commercial Renewables $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 30, 2022 Units	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of disposal groups \| Units	2
Pre-tax impairment		$ 220	$ 1,700
Noncontrolling interest balance		$ 1,700	$ 1,600

Dispositions (Balance Sheet) (D

Dispositions (Balance Sheet) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Current Assets Held for Sale
Total current assets held for sale	$ 374	$ 356
Noncurrent Assets Held for Sale
Total other noncurrent assets held for sale	5,538	5,634
Current Liabilities Associated with Assets Held for Sale
Total current liabilities associated with assets held for sale	476	535
Noncurrent Liabilities Associated with Assets Held for Sale
Total other noncurrent liabilities associated with assets held for sale	1,931	1,927
Discontinued Operations, Held-for-sale \| Commercial Renewables
Current Assets Held for Sale
Cash and cash equivalents	12	10
Receivables, net	114	107
Inventory	81	88
Other	167	151
Total current assets held for sale	374	356
Noncurrent Assets Held for Sale
Cost	6,334	6,444
Accumulated depreciation and amortization	(1,651)	(1,651)
Net property, plant and equipment	4,683	4,793
Operating lease right-of-use assets, net	142	140
Investments in equity method unconsolidated affiliates	512	522
Other	201	179
Total other noncurrent assets held for sale	855	841
Total Assets Held for Sale	5,912	5,990
Current Liabilities Associated with Assets Held for Sale
Accounts payable	80	122
Taxes accrued	9	17
Current maturities of long-term debt	275	276
Other	112	120
Total current liabilities associated with assets held for sale	476	535
Noncurrent Liabilities Associated with Assets Held for Sale
Long-Term debt	1,184	1,188
Operating lease liabilities	150	150
Asset retirement obligations	196	190
Other	401	399
Total other noncurrent liabilities associated with assets held for sale	1,931	1,927
Total Liabilities Associated with Assets Held for Sale	$ 2,407	$ 2,462

Dispositions (Income Statement)

Dispositions (Income Statement) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations	$ (209)	$ (15)
Add: Net loss attributable to noncontrolling interest included in discontinued operations	64	27
Net income from discontinued operations attributable to Duke Energy Corporation	(145)	12
Discontinued Operations, Held-for-sale \| Commercial Renewables
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenues	80	121
Operation, maintenance and other	89	81
Depreciation and amortization	0	64
Property and other taxes	10	10
Other income and expenses, net	(4)	0
Interest expense	31	19
Loss on disposal	220	0
Loss before income taxes	(274)	(53)
Income tax benefit	(65)	(38)
Loss from discontinued operations	(209)	(15)
Add: Net loss attributable to noncontrolling interest included in discontinued operations	64	27
Net income from discontinued operations attributable to Duke Energy Corporation	$ (145)	$ 12

Dispositions (Cash Flow Stateme

Dispositions (Cash Flow Statement) (Details) - Commercial Renewables - Discontinued Operations, Held-for-sale - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating activities	$ (54)	$ 64
Investing activities	$ (151)	$ (88)

Business Segments (Narrative) (

Business Segments (Narrative) (Details)	3 Months Ended
Business Segments (Narrative) (Details)	Mar. 31, 2023 Segment segment
Segment Reporting Information [Line Items]
Number of reportable segments \| Segment	2
Duke Energy Ohio
Segment Reporting Information [Line Items]
Number of reportable segments \| segment	2

Business Segments (Business Seg

Business Segments (Business Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Operating Revenues	$ 7,276	$ 7,011
Segment income (loss)	910	806
Less: Noncontrolling interests	43	37
Add: Preferred stock dividend	39	39
Discontinued operations	(145)	12
Net Income	761	820
Segment assets	178,833		$ 178,086
Impairment of assets and other charges	8	215
Regulated electric	6,324	5,933
Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	709	638
Segment income (loss)	100	77
Segment assets	11,693		$ 11,506
Regulated electric	474	412
Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	6,381	5,995
Less: Noncontrolling interests		(22)
Impairment of assets and other charges		211
Regulated electric		(46)
Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	888	1,009
Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	7,269	7,004
Operating Segments \| Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	6,398	6,002
Segment income (loss)	791	723
Segment assets	152,989
Operating Segments \| Electric Utilities and Infrastructure \| Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	474	412
Segment income (loss)	49	41
Segment assets	7,553
Operating Segments \| Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	911	1,032
Segment income (loss)	287	254
Segment assets	16,217
Operating Segments \| Gas Utilities and Infrastructure \| Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	235	226
Segment income (loss)	52	38
Segment assets	4,041
Operating Segments \| Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	7,309	7,034
Segment income (loss)	1,078	977
Segment assets	169,206
Operating Segments \| Total Reportable Segments \| Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	709	638
Segment income (loss)	101	79
Segment assets	11,594
Other
Segment Reporting Information [Line Items]
Segment assets	9,627
Other \| Other \| Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment income (loss)	(1)	(2)
Segment assets	10
Corporate And Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	31	30
Segment income (loss)	(168)	(171)
Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(64)	(53)
Segment assets	0
Eliminations \| Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment assets	89
Eliminations \| Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	17	7
Eliminations \| Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	23	23
Eliminations \| Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	40	30
Eliminations \| Other
Segment Reporting Information [Line Items]
Operating Revenues	24	23
Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 7	$ 7

Regulatory Matters (Regulatory

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas and Duke Energy Progress) (Details) $ in Millions					3 Months Ended
	Sep. 27, 2021 contention	Jul. 28, 2021	Jun. 07, 2021	Jun. 06, 2021	Mar. 31, 2023	Apr. 20, 2023 USD ($)	Aug. 05, 2022 USD ($)
Nuclear Regulatory Commission
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)					20 years
Oconee Nuclear Station Subsequent License Renewal \| Nuclear Regulatory Commission \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Comment period (in days)		60 days
Number of contentions \| contention	3
Oconee Nuclear Station Subsequent License Renewal \| Oconee Nuclear Station \| Nuclear Regulatory Commission \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)			20 years
Operating license (in years)			80 years	60 years
Storm Cost Securitization Legislation \| PSCSC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Deferred storm costs							$ 223
Storm Cost Securitization Legislation \| PSCSC \| Duke Energy Progress \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Deferred storm costs						$ 171

Regulatory Matters (Regulator_2

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas) (Details) - 2023 North Carolina Rate Case - NCUC - Duke Energy Carolinas - USD ($) $ in Millions		11 Months Ended	12 Months Ended
	Jan. 19, 2023	Dec. 31, 2026	Jan. 18, 2026	Jan. 18, 2025	Jan. 18, 2024
Public Utilities, General Disclosures [Line Items]
Proposed rate period (in years)	3 years
Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		$ 823	$ 150	$ 172
Requested return on equity (as a percent)		15.70%
Forecast \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount					$ 501

Regulatory Matters (Regulator_3

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Progress) (Details) - Duke Energy Progress - USD ($) $ in Millions			7 Months Ended	9 Months Ended	12 Months Ended
	Oct. 06, 2022	Sep. 01, 2022	Dec. 31, 2025	Dec. 31, 2025	May 31, 2027	May 31, 2026	Mar. 31, 2026	May 31, 2025	Mar. 31, 2025	May 31, 2024	Mar. 31, 2024
2022 North Carolina Rate Case \| NCUC
Public Utilities, General Disclosures [Line Items]
Proposed rate period (in years)	3 years
2022 North Carolina Rate Case \| NCUC \| Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount			$ 615	$ 587		$ 138	$ 140	$ 151	$ 127
Requested return on equity (as a percent)				15%	16%
2022 North Carolina Rate Case \| NCUC \| Forecast \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount										$ 326	$ 320
2022 South Carolina Rate Case \| PSCSC
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease), amount		$ 52
2022 South Carolina Rate Case, Retail Rate Case \| PSCSC
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease), amount		$ 36
Approved return on equity percentage (as a percent)		9.60%
2022 South Carolina Rate Case, Retail Rate Case \| PSCSC \| Equity
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)		52.43%
2022 South Carolina Rate Case, Retail Rate Case \| PSCSC \| Debt
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)		47.57%
2022 South Carolina Rate Case, Coal Ash Basin Closure Costs \| PSCSC
Public Utilities, General Disclosures [Line Items]
Deferred compliance costs period (in years)		7 years
Deferred compliance costs		$ 50

Regulatory Matters (Regulator_4

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Florida) (Details) - Duke Energy Florida

3 Months Ended

12 Months Ended

Oct. 17, 2022 USD ($)

Oct. 04, 2022 USD ($)

Jun. 15, 2022 USD ($)

May 04, 2021 USD ($)

Jul. 01, 2020 USD ($) plant MW

Mar. 31, 2023 USD ($)

Dec. 31, 2034 USD ($)

Dec. 31, 2023 USD ($)

Dec. 31, 2022 USD ($)

Sep. 28, 2022 outage

Sep. 27, 2022 USD ($)

Apr. 11, 2022 USD ($)

Solar Project

Public Utilities, General Disclosures [Line Items]

Estimated cost of facilities

$ 1,000,000,000

FPSC

Public Utilities, General Disclosures [Line Items]

Number of solar plants | plant

Generation capacity (MW) | MW

750

FPSC | Hurricane Ian

Public Utilities, General Disclosures [Line Items]

Number of outages | outage

1,100,000

Deferred storm coats

$ 357,000,000

Storm reserves

$ 132,000,000

$ 107,000,000

Interim recovery payments

442,000,000

2021 Settlement | FPSC

Public Utilities, General Disclosures [Line Items]

Approved rate increase (decrease), amount

67,000,000

Public utilities, approved equity capital structure, percentage (as a percent)

53%

Public utilities, approved debt capital structure, percentage

47%

Public utilities, basis points, increase, percentage

0.25%

Contract with customer, asset, after allowance for credit loss, noncurrent

$ 154,000,000

$ 173,000,000

$ 54,000,000

Proceeds from legal settlements

$ 180,000,000

Requested rate increase (decrease), amount

$ (56,000,000)

Future investment in infrastructure

$ 1,000,000,000

2021 Settlement | FPSC | US Treasury Securities

Public Utilities, General Disclosures [Line Items]

Public utilities, basis points, increase, percentage

0.50%

2021 Settlement | FPSC | Minimum

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

8.85%

2021 Settlement | FPSC | Minimum | US Treasury Securities

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

9.85%

2021 Settlement | FPSC | Maximum

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

10.85%

2021 Settlement | FPSC | Maximum | US Treasury Securities

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

10.10%

2021 Settlement | FPSC | Weighted Average

Public Utilities, General Disclosures [Line Items]

Approved return on equity percentage (as a percent)

9.85%

2021 Settlement | FPSC | Forecast

Public Utilities, General Disclosures [Line Items]

Approved rate increase (decrease), amount

$ 79,000,000

$ 49,000,000

Contract with customer, asset, after allowance for credit loss, noncurrent

$ 119,000,000

Storm Protection Plan | FPSC

Public Utilities, General Disclosures [Line Items]

Investment in transmission and distribution

$ 7,000,000,000

Cost reduction to transmission loop

$ 80,000,000

Cost reduction period (in years)

10 years

Regulatory Matters (Regulator_5

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Ohio) (Details) - USD ($) $ in Millions						3 Months Ended
	Apr. 28, 2023	Mar. 10, 2023	Dec. 01, 2022	Sep. 19, 2022	Oct. 01, 2021	Mar. 31, 2023	Mar. 31, 2022
Public Utilities, General Disclosures [Line Items]
Operating Revenues						$ 7,276	$ 7,011
Operation, maintenance and other						1,310	1,548
Income Tax Expense From Continuing Operations						(155)	(25)
Duke Energy Ohio
Public Utilities, General Disclosures [Line Items]
Operating Revenues						709	638
Operation, maintenance and other						123	178
Income Tax Expense From Continuing Operations						(20)	$ 56
Duke Energy Ohio Electric Base Rate Case \| PUCO \| Duke Energy Ohio
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount				$ 23	$ 55
Requested return on equity (as a percent)				9.50%	10.30%
Duke Energy Ohio Gas Base Rate Case \| PUCO \| Duke Energy Ohio
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						$ 49
Requested return on equity (as a percent)						10.30%
Requested rate increase, percentage						5.60%
Duke Energy Ohio Gas Base Rate Case \| PUCO \| Duke Energy Ohio \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount	$ 32
Requested return on equity (as a percent)	9.60%
Duke Energy Ohio Gas Base Rate Case \| PUCO \| Duke Energy Ohio \| Minimum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						$ 24
Requested return on equity (as a percent)						9.03%
Duke Energy Ohio Gas Base Rate Case \| PUCO \| Duke Energy Ohio \| Maximum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						$ 36
Requested return on equity (as a percent)						10.04%
Equity ratio (as a percent)						52.32%
Duke Energy Ohio Gas Base Rate Case \| PUCO \| Duke Energy Ohio \| Maximum \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Equity ratio (as a percent)	52.32%
Duke Energy Kentucky Electric Base Rate Case \| KPSC \| Duke Energy Ohio
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		$ 31	$ 75
Requested return on equity (as a percent)		9.55%	10.35%
Requested rate increase, percentage						17.80%

Regulatory Matters (Regulator_6

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Indiana) (Details) - USD ($)					3 Months Ended		12 Months Ended
	Jul. 28, 2021	Jun. 29, 2020	Dec. 04, 2019	Jul. 02, 2019	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Feb. 03, 2023	Jun. 15, 2022	Dec. 31, 2020
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges					$ 8,000,000	$ 215,000,000
Operating Revenues					7,276,000,000	7,011,000,000
Duke Energy Indiana
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges						211,000,000
Operating Revenues					$ 975,000,000	822,000,000
Duke Energy Indiana \| IURC \| Indiana rate case 2019
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount				$ 395,000,000
Requested rate increase, percentage, net of tax			15.60%
Requested rate increase (decrease), amended amount			$ 396,000,000
Approved rate increase (decrease), amount		$ 146,000,000
Rate base										$ 10,200,000,000
Reduction of requested rate increase		$ 200,000,000
Reduction due to depreciation methodology		50%
Reduction due to approved return on equity		20%
Approved return on equity percentage (as a percent)		9.70%
Requested return on equity (as a percent)		10.40%
Reduction due to earnings adjustments		20%
Estimated percentage of total rate increase, step one		75%
Estimated percentage of total rate increase, step two	25%
Impairment of assets and other charges						211,000,000
Operating Revenues						$ 46,000,000
Regulatory Matters, Settlement To Customers								$ 70,000,000
Duke Energy Indiana \| IURC \| TDSIG 2.0
Public Utilities, General Disclosures [Line Items]
Future investment in infrastructure									$ 2,000,000,000
Duke Energy Indiana \| IURC \| Indiana Coal Ash Recovery
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges							$ 175,000,000

Regulatory Matters (Regulator_7

Regulatory Matters (Regulatory Matters Narrative - Piedmont) (Details)	Oct. 10, 2022
Piedmont \| Tennessee Annual Review Mechanism \| TPUC
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)	9.80%

Commitments and Contingencies_2

Commitments and Contingencies (Schedule of Environmental Loss Contingencies) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	$ 86	$ 84
Duke Energy Carolinas
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	23	22
Progress Energy
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	20	19
Duke Energy Progress
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	9	8
Duke Energy Florida
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	11	11
Duke Energy Ohio
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	33	33
Duke Energy Indiana
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	3	3
Piedmont
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	$ 7	$ 7

Commitments and Contingencies_3

Commitments and Contingencies (Narrative) (Details) $ in Millions	Jun. 16, 2021 people	Mar. 31, 2023 USD ($) case	Dec. 31, 2022 USD ($)
Texas Storm Uri Tort Litigation \| Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, pending claims, number \| case		5
Duke Energy Carolinas \| Ruben Villano, et al. v. Duke Energy Carolinas, LLC \| Pending Litigation
Loss Contingencies [Line Items]
Number of individuals \| people	9
Number of survivors \| people	4
Number of deceased individuals \| people	5
Duke Energy Carolinas \| Asbestos-related Injuries and Damages Claims
Loss Contingencies [Line Items]
Asbestos-related injuries and damages reserves \| $		$ 451	$ 457
Probable insurance recoveries \| $		595	595
Duke Energy and Duke Energy Carolinas \| ASU 2016-13
Loss Contingencies [Line Items]
Reserve for credit losses for insurance receivables \| $		$ 12	$ 12

Debt and Credit Facilities (Sum

Debt and Credit Facilities (Summary of Debt Issuances) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Current maturities of long-term debt (includes amounts related to VIEs)	$ 3,330,000,000	$ 3,878,000,000
4.95% January 2023 Notes Due January 2033
Debt Instrument [Line Items]
Interest Rate	4.95%
5.350% January 2023 Notes Due January 2053
Debt Instrument [Line Items]
Interest Rate	5.35%
5.250% March 2022 Notes Due April 2033
Debt Instrument [Line Items]
Interest Rate	5.25%
5.350% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Interest Rate	5.35%
5.250% March 2022 Notes Due April 2033
Debt Instrument [Line Items]
Interest Rate	5.25%
5.650% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Interest Rate	5.65%
5.400% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Interest Rate	5.40%
Maturities Due March 2023
Debt Instrument [Line Items]
Repayments of Debt	$ 1,000,000,000
Maturities Due September 2023
Debt Instrument [Line Items]
Repayments of Debt	300,000,000
Maturities Due October 2023
Debt Instrument [Line Items]
Repayments of Debt	100,000,000
Maturities Due October 2023
Debt Instrument [Line Items]
Repayments of Debt	300,000,000
Duke Energy (Parent)
Debt Instrument [Line Items]
Debt issuances	4,050,000,000
Duke Energy (Parent) \| 4.95% January 2023 Notes Due January 2033
Debt Instrument [Line Items]
Debt issuances	900,000,000
Duke Energy (Parent) \| 5.350% January 2023 Notes Due January 2053
Debt Instrument [Line Items]
Debt issuances	900,000,000
Duke Energy (Parent) \| 5.250% March 2022 Notes Due April 2033
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy (Parent) \| 5.350% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy (Parent) \| 5.250% March 2022 Notes Due April 2033
Debt Instrument [Line Items]
Debt issuances	375,000,000
Duke Energy (Parent) \| 5.650% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Debt issuances	375,000,000
Duke Energy (Parent) \| 5.400% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Carolinas
Debt Instrument [Line Items]
Debt issuances	1,800,000,000
Current maturities of long-term debt (includes amounts related to VIEs)	18,000,000	1,018,000,000
Duke Energy Carolinas \| 4.95% January 2023 Notes Due January 2033
Debt Instrument [Line Items]
Debt issuances	900,000,000
Duke Energy Carolinas \| 5.350% January 2023 Notes Due January 2053
Debt Instrument [Line Items]
Debt issuances	900,000,000
Duke Energy Carolinas \| 5.250% March 2022 Notes Due April 2033
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Carolinas \| 5.350% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Carolinas \| 5.250% March 2022 Notes Due April 2033
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Carolinas \| 5.650% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Carolinas \| 5.400% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress
Debt Instrument [Line Items]
Debt issuances	1,000,000,000
Current maturities of long-term debt (includes amounts related to VIEs)	370,000,000	369,000,000
Duke Energy Progress \| 4.95% January 2023 Notes Due January 2033
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress \| 5.350% January 2023 Notes Due January 2053
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress \| 5.250% March 2022 Notes Due April 2033
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Progress \| 5.350% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Progress \| 5.250% March 2022 Notes Due April 2033
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress \| 5.650% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress \| 5.400% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Ohio
Debt Instrument [Line Items]
Debt issuances	750,000,000
Current maturities of long-term debt (includes amounts related to VIEs)	475,000,000	475,000,000
Duke Energy Ohio \| 5.250% March 2022 Notes Due April 2033
Debt Instrument [Line Items]
Debt issuances	375,000,000
Duke Energy Ohio \| 5.650% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Debt issuances	375,000,000
Duke Energy Indiana
Debt Instrument [Line Items]
Debt issuances	500,000,000
Current maturities of long-term debt (includes amounts related to VIEs)	3,000,000	$ 303,000,000
Duke Energy Indiana \| 4.95% January 2023 Notes Due January 2033
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana \| 5.350% January 2023 Notes Due January 2053
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana \| 5.250% March 2022 Notes Due April 2033
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana \| 5.350% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana \| 5.250% March 2022 Notes Due April 2033
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana \| 5.650% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Indiana \| 5.400% March 2022 Notes Due April 2053
Debt Instrument [Line Items]
Debt issuances	$ 500,000,000

Debt and Credit Facilities (S_2

Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 3,330	$ 3,878
Other debt securities
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 330
Duke Energy (Parent) \| Debt Maturing April 2023, 2.875% Coupon \| Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	2.875%
Current maturities of long-term debt	$ 350
Duke Energy (Parent) \| Debt Maturing June 2023, 2.048% Coupon \| Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.631%
Current maturities of long-term debt	$ 500
Duke Energy (Parent) \| Debt Maturing October 2023, 3.950% Coupon \| Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	3.95%
Current maturities of long-term debt	$ 400
Duke Energy (Parent) \| Debt Maturing March 2024, 5.385% Coupon \| Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5.385%
Current maturities of long-term debt	$ 1,000
Duke Energy Ohio
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 475	475
Duke Energy Ohio \| Debt Maturing October 2023, 4.879% Coupon \| Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.879%
Current maturities of long-term debt	$ 150
Duke Energy Ohio \| Debt Maturing September 2023, 3.800% Coupon \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	3.80%
Current maturities of long-term debt	$ 300
Duke Energy Carolinas
Debt Instrument [Line Items]
Current maturities of long-term debt	18	1,018
Duke Energy Progress
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 370	$ 369
Duke Energy Progress \| Debt Maturing September 2023, 3.375% Coupon \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	3.375%
Current maturities of long-term debt	$ 300

Debt and Credit Facilities (Nar

Debt and Credit Facilities (Narrative) (Details)		1 Months Ended
Debt and Credit Facilities (Narrative) (Details)	Mar. 09, 2022 USD ($)	Apr. 30, 2023 USD ($) $ / shares	Mar. 31, 2023 USD ($) $ / shares	Dec. 31, 2022 $ / shares
Debt Instrument [Line Items]
Common stock, par value (in usd per share) \| $ / shares			$ 0.001	$ 0.001
4.95% January 2023 Notes Due January 2033
Debt Instrument [Line Items]
Interest Rate			4.95%
Subsequent event \| 4.25% Convertible Senior notes Due April 2026
Debt Instrument [Line Items]
Interest Rate		4.125%
Duke Energy (Parent)
Debt Instrument [Line Items]
sale of debt			$ 4,050,000,000
Duke Energy (Parent) \| 4.95% January 2023 Notes Due January 2033
Debt Instrument [Line Items]
sale of debt			$ 900,000,000
Duke Energy (Parent) \| Subsequent event \| 4.25% Convertible Senior notes Due April 2026
Debt Instrument [Line Items]
sale of debt		$ 1,700,000,000
Common stock, par value (in usd per share) \| $ / shares		$ 0.001
Conversion ratio		0.0084131
Debt conversion rate (as a percent)		25%
Progress Energy
Debt Instrument [Line Items]
Common stock, par value (in usd per share) \| $ / shares			$ 0.01	$ 0.01
Master Credit Facility
Debt Instrument [Line Items]
Facility size			$ 9,000,000,000
Master Credit Facility \| Duke Energy Florida
Debt Instrument [Line Items]
Facility size			$ 1,350,000,000
Master Credit Facility \| Term Loan Facility \| Duke Energy (Parent)
Debt Instrument [Line Items]
Facility size	$ 1,400,000,000
Extension period (in years)	2 years
June 2017 Three Year Revolving Credit Facility
Debt Instrument [Line Items]
Facility term (in years)	3 years

Debt and Credit Facilities (Sch

Debt and Credit Facilities (Schedule of Line of Credit Facilities) (Details) - Master Credit Facility	Mar. 31, 2023 USD ($)
Line of Credit Facility [Line Items]
Facility size	$ 9,000,000,000
Commercial paper	(3,452,000,000)
Outstanding letters of credit	(39,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity under the Master Credit Facility	5,428,000,000
Duke Energy Carolinas
Line of Credit Facility [Line Items]
Facility size	2,025,000,000
Commercial paper	(1,310,000,000)
Outstanding letters of credit	(4,000,000)
Available capacity under the Master Credit Facility	711,000,000
Duke Energy Progress
Line of Credit Facility [Line Items]
Facility size	900,000,000
Commercial paper	(150,000,000)
Outstanding letters of credit	(1,000,000)
Available capacity under the Master Credit Facility	749,000,000
Duke Energy Florida
Line of Credit Facility [Line Items]
Facility size	1,350,000,000
Commercial paper	(776,000,000)
Outstanding letters of credit	(7,000,000)
Available capacity under the Master Credit Facility	567,000,000
Duke Energy Ohio
Line of Credit Facility [Line Items]
Facility size	700,000,000
Commercial paper	(93,000,000)
Available capacity under the Master Credit Facility	607,000,000
Duke Energy Indiana
Line of Credit Facility [Line Items]
Facility size	950,000,000
Commercial paper	(328,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity under the Master Credit Facility	541,000,000
Piedmont
Line of Credit Facility [Line Items]
Facility size	800,000,000
Commercial paper	(301,000,000)
Available capacity under the Master Credit Facility	499,000,000
Duke Energy (Parent) \| Proceeds loaned to subsidiary registrants
Line of Credit Facility [Line Items]
Commercial paper	(625,000,000)
Duke Energy (Parent) \| Duke Energy (Parent)
Line of Credit Facility [Line Items]
Facility size	2,275,000,000
Commercial paper	(494,000,000)
Outstanding letters of credit	(27,000,000)
Available capacity under the Master Credit Facility	$ 1,754,000,000

Goodwill (Narrative) (Details)

Goodwill (Narrative) (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Goodwill	$ 19,303,000,000	$ 19,303,000,000
Accumulated impairment charges	0	0
Duke Energy Ohio
Goodwill [Line Items]
Goodwill	920,000,000	920,000,000
Accumulated impairment charges	216,000,000	216,000,000
Progress Energy
Goodwill [Line Items]
Goodwill	3,655,000,000	3,655,000,000
Piedmont
Goodwill [Line Items]
Goodwill	49,000,000	49,000,000
Electric Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	17,400,000,000	17,400,000,000
Electric Utilities and Infrastructure \| Duke Energy Ohio
Goodwill [Line Items]
Goodwill	596,000,000	596,000,000
Electric Utilities and Infrastructure \| Progress Energy
Goodwill [Line Items]
Accumulated impairment charges	0	0
Gas Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	1,900,000,000	1,900,000,000
Gas Utilities and Infrastructure \| Duke Energy Ohio
Goodwill [Line Items]
Goodwill	324,000,000	324,000,000
Gas Utilities and Infrastructure \| Piedmont
Goodwill [Line Items]
Accumulated impairment charges	$ 0	$ 0

Related Party Transactions (Oth

Related Party Transactions (Other Revenue and Expense) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Duke Energy Carolinas \| Corporate governance and shared service expenses \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 196	$ 206
Duke Energy Carolinas \| Indemnification coverages \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	9	7
Duke Energy Carolinas \| JDA \| Duke Energy Progress
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	29	94
Related party transaction, other revenues from transactions with related party	13	26
Duke Energy Carolinas \| Intercompany natural gas purchases and sales \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5	13
Progress Energy \| Corporate governance and shared service expenses \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	178	196
Progress Energy \| Indemnification coverages \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	12	11
Progress Energy \| JDA \| Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	13	26
Related party transaction, other revenues from transactions with related party	29	94
Progress Energy \| Intercompany natural gas purchases and sales \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	19	19
Duke Energy Progress \| Corporate governance and shared service expenses \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	107	119
Duke Energy Progress \| Indemnification coverages \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5	5
Duke Energy Progress \| JDA \| Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	13	26
Related party transaction, other revenues from transactions with related party	29	94
Duke Energy Progress \| Intercompany natural gas purchases and sales \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	19	19
Duke Energy Florida \| Corporate governance and shared service expenses \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	71	77
Duke Energy Florida \| Indemnification coverages \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	7	6
Duke Energy Ohio \| Corporate governance and shared service expenses \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	73	82
Duke Energy Ohio \| Indemnification coverages \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1	1
Duke Energy Indiana \| Corporate governance and shared service expenses \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	99	124
Duke Energy Indiana \| Indemnification coverages \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	2	2
Piedmont \| Corporate governance and shared service expenses \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	38	35
Piedmont \| Indemnification coverages \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1	1
Piedmont \| Intercompany natural gas purchases and sales \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, other revenues from transactions with related party	24	32
Piedmont \| Natural gas storage and transportation costs \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 6	$ 6

Related Party Transactions (Int

Related Party Transactions (Intercompany Income Taxes) (Details) - Affiliated Entity - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Duke Energy Carolinas
Related Party Transaction [Line Items]
Intercompany income tax payable		$ 37
Progress Energy
Related Party Transaction [Line Items]
Intercompany income tax receivable	$ 21	95
Duke Energy Progress
Related Party Transaction [Line Items]
Intercompany income tax receivable		36
Intercompany income tax payable	2
Duke Energy Florida
Related Party Transaction [Line Items]
Intercompany income tax receivable		17
Intercompany income tax payable	30
Duke Energy Ohio
Related Party Transaction [Line Items]
Intercompany income tax payable	15	17
Duke Energy Indiana
Related Party Transaction [Line Items]
Intercompany income tax payable	24	18
Piedmont
Related Party Transaction [Line Items]
Intercompany income tax payable	$ 38	$ 38

Derivatives and Hedging (Notion

Derivatives and Hedging (Notional Amounts of Derivative Instruments) (Details) Mcf in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($) GWh Mcf	Dec. 31, 2022 USD ($) GWh Mcf
Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 3,377	$ 2,877
Commodity contracts \| Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) \| GWh	5,984	14,086
Commodity contracts \| Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) \| Mcf	903	909
Designated contracts \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,300	$ 500
Undesignated contracts \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	2,077	2,377
Duke Energy Carolinas \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 800	$ 1,250
Duke Energy Carolinas \| Commodity contracts \| Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) \| Mcf	311	307
Duke Energy Carolinas \| Undesignated contracts \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 800	$ 1,250
Progress Energy \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,050	$ 800
Progress Energy \| Commodity contracts \| Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) \| Mcf	294	292
Progress Energy \| Undesignated contracts \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,050	$ 800
Duke Energy Progress \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 250	$ 500
Duke Energy Progress \| Commodity contracts \| Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) \| Mcf	294	292
Duke Energy Progress \| Undesignated contracts \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 250	$ 500
Duke Energy Florida \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	800	300
Duke Energy Florida \| Undesignated contracts \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	800	300
Duke Energy Indiana \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 200	$ 300
Duke Energy Indiana \| Commodity contracts \| Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) \| GWh	5,264	12,266
Duke Energy Indiana \| Commodity contracts \| Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) \| Mcf	8	11
Duke Energy Indiana \| Undesignated contracts \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 200	$ 300
Duke Energy Ohio \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 27	$ 27
Duke Energy Ohio \| Commodity contracts \| Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) \| GWh	720	1,820
Duke Energy Ohio \| Undesignated contracts \| Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 27	$ 27
Piedmont \| Commodity contracts \| Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) \| Mcf	290	299

Derivatives and Hedging (Foreig

Derivatives and Hedging (Foreign Exchange Risk) (Details) - Foreign Currency Contracts - Designated contracts € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2023 EUR (€)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 1,182
Receive notional \| €		€ 1,100
Fair value gain (loss)	10
Senior Notes, 3.10% Due June 2028
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 645
Pay Rate	4.75%	4.75%
Receive notional \| €		€ 600
Rate	0.0310	0.0310
Fair value gain (loss)	$ 5
Senior Notes, 3.85% Due June 2034
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 537
Pay Rate	5.31%	5.31%
Receive notional \| €		€ 500
Rate	0.0385	0.0385
Fair value gain (loss)	$ 5

Derivatives and Hedging (Locati

Derivatives and Hedging (Location and Fair Value Amounts of Derivatives Reflected in the Condensed Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	$ 268	$ 795
Location and fair value amounts of derivatives (Liability)	603	437
Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	128	582
Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	140	213
Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	282	193
Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	321	244
Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	175	478
Location and fair value amounts of derivatives (Liability)	501	377
Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	93	317
Location and fair value amounts of derivatives (Liability)	40	2
Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	62
Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)		58
Not Designated as Hedging Instruments \| Commodity Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	35	265
Not Designated as Hedging Instruments \| Commodity Contracts \| Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	140	213
Not Designated as Hedging Instruments \| Commodity Contracts \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	264	175
Not Designated as Hedging Instruments \| Commodity Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	237	202
Not Designated as Hedging Instruments \| Interest Rate Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	7	216
Not Designated as Hedging Instruments \| Interest Rate Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	26	2
Designated as Hedging Instruments \| Interest Rate Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	86
Designated as Hedging Instruments \| Interest Rate Contracts \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		101
Designated as Hedging Instruments \| Interest Rate Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	14
Designated as Hedging Instruments \| Foreign Currency Contracts \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	18	18
Designated as Hedging Instruments \| Foreign Currency Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	44	40
Duke Energy Carolinas
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	80	330
Location and fair value amounts of derivatives (Liability)	201	127
Duke Energy Carolinas \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	13	226
Duke Energy Carolinas \| Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	67	104
Duke Energy Carolinas \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	143	96
Duke Energy Carolinas \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	58	31
Duke Energy Carolinas \| Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	79	236
Location and fair value amounts of derivatives (Liability)	197	127
Duke Energy Carolinas \| Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1	94
Location and fair value amounts of derivatives (Liability)	4
Duke Energy Carolinas \| Not Designated as Hedging Instruments \| Commodity Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	12	132
Duke Energy Carolinas \| Not Designated as Hedging Instruments \| Commodity Contracts \| Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	67	104
Duke Energy Carolinas \| Not Designated as Hedging Instruments \| Commodity Contracts \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	143	96
Duke Energy Carolinas \| Not Designated as Hedging Instruments \| Commodity Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	54	31
Duke Energy Carolinas \| Not Designated as Hedging Instruments \| Interest Rate Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1	94
Duke Energy Carolinas \| Not Designated as Hedging Instruments \| Interest Rate Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	4
Progress Energy
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	88	248
Location and fair value amounts of derivatives (Liability)	153	66
Progress Energy \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	15	140
Progress Energy \| Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	73	108
Progress Energy \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	90	36
Progress Energy \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	63	30
Progress Energy \| Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	82	207
Location and fair value amounts of derivatives (Liability)	141	66
Progress Energy \| Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	6	41
Location and fair value amounts of derivatives (Liability)	12
Progress Energy \| Not Designated as Hedging Instruments \| Commodity Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	9	99
Progress Energy \| Not Designated as Hedging Instruments \| Commodity Contracts \| Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	73	108
Progress Energy \| Not Designated as Hedging Instruments \| Commodity Contracts \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	90	36
Progress Energy \| Not Designated as Hedging Instruments \| Commodity Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	51	30
Progress Energy \| Not Designated as Hedging Instruments \| Interest Rate Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	6	41
Progress Energy \| Not Designated as Hedging Instruments \| Interest Rate Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	12
Duke Energy Progress
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	82	230
Location and fair value amounts of derivatives (Liability)	149	48
Duke Energy Progress \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	9	122
Duke Energy Progress \| Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	73	108
Duke Energy Progress \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	90	18
Duke Energy Progress \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	59	30
Duke Energy Progress \| Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	82	207
Location and fair value amounts of derivatives (Liability)	141	48
Duke Energy Progress \| Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		23
Location and fair value amounts of derivatives (Liability)	8
Duke Energy Progress \| Not Designated as Hedging Instruments \| Commodity Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	9	99
Duke Energy Progress \| Not Designated as Hedging Instruments \| Commodity Contracts \| Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	73	108
Duke Energy Progress \| Not Designated as Hedging Instruments \| Commodity Contracts \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	90	18
Duke Energy Progress \| Not Designated as Hedging Instruments \| Commodity Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	51	30
Duke Energy Progress \| Not Designated as Hedging Instruments \| Interest Rate Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		23
Duke Energy Progress \| Not Designated as Hedging Instruments \| Interest Rate Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	8
Duke Energy Florida
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	6	17
Location and fair value amounts of derivatives (Liability)	3	19
Duke Energy Florida \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	6	17
Duke Energy Florida \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)		19
Duke Energy Florida \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	3
Duke Energy Florida \| Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)		19
Duke Energy Florida \| Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	6	17
Location and fair value amounts of derivatives (Liability)	3
Duke Energy Florida \| Not Designated as Hedging Instruments \| Commodity Contracts \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)		19
Duke Energy Florida \| Not Designated as Hedging Instruments \| Interest Rate Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	6	17
Duke Energy Florida \| Not Designated as Hedging Instruments \| Interest Rate Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	3
Duke Energy Ohio
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1	5
Location and fair value amounts of derivatives (Liability)	1	2
Duke Energy Ohio \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1	5
Duke Energy Ohio \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	1	2
Duke Energy Ohio \| Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1	5
Duke Energy Ohio \| Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	1	2
Duke Energy Ohio \| Not Designated as Hedging Instruments \| Commodity Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1	5
Duke Energy Ohio \| Not Designated as Hedging Instruments \| Interest Rate Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	1	2
Duke Energy Indiana
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	11	110
Location and fair value amounts of derivatives (Liability)	28	16
Duke Energy Indiana \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	11	110
Duke Energy Indiana \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	19	16
Duke Energy Indiana \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	9
Duke Energy Indiana \| Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	11	29
Location and fair value amounts of derivatives (Liability)	19	16
Duke Energy Indiana \| Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		81
Location and fair value amounts of derivatives (Liability)	9
Duke Energy Indiana \| Not Designated as Hedging Instruments \| Commodity Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	11	29
Duke Energy Indiana \| Not Designated as Hedging Instruments \| Commodity Contracts \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	19	16
Duke Energy Indiana \| Not Designated as Hedging Instruments \| Interest Rate Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		81
Duke Energy Indiana \| Not Designated as Hedging Instruments \| Interest Rate Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	9
Piedmont
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1
Location and fair value amounts of derivatives (Liability)	144	168
Piedmont \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1
Piedmont \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	12	27
Piedmont \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	132	141
Piedmont \| Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1
Location and fair value amounts of derivatives (Liability)	144	168
Piedmont \| Not Designated as Hedging Instruments \| Commodity Contracts \| Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	1
Piedmont \| Not Designated as Hedging Instruments \| Commodity Contracts \| Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	12	27
Piedmont \| Not Designated as Hedging Instruments \| Commodity Contracts \| Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	$ 132	$ 141

Derivatives and Hedging (Schedu

Derivatives and Hedging (Schedule of Offsetting Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 268	$ 795
Derivative Asset, Current	109	518
Net amounts presented in Current Assets: Other	62	116
Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	128	582
Gross amounts offset	$ (19)	$ (64)
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Current Assets: Other	Current Assets: Other
Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 140	$ 213
Gross amounts offset	$ (78)	$ (97)
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other	Other
Duke Energy Carolinas
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 80	$ 330
Derivative Asset, Current	2	193
Net amounts presented in Current Assets: Other	29	64
Duke Energy Carolinas \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	13	226
Gross amounts offset	(11)	(33)
Duke Energy Carolinas \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	67	104
Gross amounts offset	(38)	(40)
Progress Energy
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	88	248
Derivative Asset, Current	7	110
Net amounts presented in Current Assets: Other	33	51
Progress Energy \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	15	140
Gross amounts offset	(8)	(30)
Progress Energy \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	73	108
Gross amounts offset	(40)	(57)
Duke Energy Progress
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	82	230
Derivative Asset, Current	1	92
Net amounts presented in Current Assets: Other	33	51
Duke Energy Progress \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	9	122
Gross amounts offset	(8)	(30)
Duke Energy Progress \| Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	73	108
Gross amounts offset	(40)	(57)
Duke Energy Florida
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	6	17
Derivative Asset, Current	6	17
Duke Energy Florida \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	6	17
Duke Energy Ohio
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	1	5
Derivative Asset, Current	1	5
Duke Energy Ohio \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	1	5
Duke Energy Indiana
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	11	110
Derivative Asset, Current	11	110
Duke Energy Indiana \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	11	$ 110
Piedmont
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	1
Derivative Asset, Current	1
Piedmont \| Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 1

Derivatives and Hedging (Sche_2

Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 603	$ 437
Net amounts presented in Current Liabilities: Other	235	144
Net amounts presented in Current Liabilities: Other	238	185
Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	282	193
Gross amounts offset	$ (47)	$ (49)
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current Liabilities: Other	Current Liabilities: Other
Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 321	$ 244
Gross amounts offset	$ (83)	$ (59)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other	Other
Duke Energy Carolinas
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 201	$ 127
Net amounts presented in Current Liabilities: Other	123	81
Net amounts presented in Current Liabilities: Other	15	2
Duke Energy Carolinas \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	143	96
Gross amounts offset	(20)	(15)
Duke Energy Carolinas \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	58	31
Gross amounts offset	(43)	(29)
Progress Energy
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	153	66
Net amounts presented in Current Liabilities: Other	82	18
Net amounts presented in Current Liabilities: Other	23
Progress Energy \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	90	36
Gross amounts offset	(8)	(18)
Progress Energy \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	63	30
Gross amounts offset	(40)	(30)
Duke Energy Progress
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	149	48
Net amounts presented in Current Liabilities: Other	82
Net amounts presented in Current Liabilities: Other	19
Duke Energy Progress \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	90	18
Gross amounts offset	(8)	(18)
Duke Energy Progress \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	59	30
Gross amounts offset	(40)	(30)
Duke Energy Florida
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	3	19
Net amounts presented in Current Liabilities: Other		19
Net amounts presented in Current Liabilities: Other	3
Duke Energy Florida \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized		19
Duke Energy Florida \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	3
Duke Energy Ohio
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	2
Net amounts presented in Current Liabilities: Other	1	2
Duke Energy Ohio \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	2
Duke Energy Indiana
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	28	16
Net amounts presented in Current Liabilities: Other	9
Duke Energy Indiana \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	19	16
Gross amounts offset	(19)	(16)
Duke Energy Indiana \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	9
Piedmont
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	144	168
Net amounts presented in Current Liabilities: Other	12	27
Net amounts presented in Current Liabilities: Other	132	141
Piedmont \| Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	12	27
Piedmont \| Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 132	$ 141

Derivatives and Hedging (Deriva

Derivatives and Hedging (Derivative Instruments with Credit-Risk Related Contingent Features and Cash Collateral) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Aggregate fair value of derivatives in a net liability position	$ 106	$ 141
Fair value of collateral already posted	10
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	96	141
Duke Energy Carolinas
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Aggregate fair value of derivatives in a net liability position	54	86
Fair value of collateral already posted	10
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	44	86
Progress Energy
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Aggregate fair value of derivatives in a net liability position	52	55
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	52	55
Duke Energy Progress
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Aggregate fair value of derivatives in a net liability position	52	48
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered	$ 52	48
Duke Energy Florida
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features
Aggregate fair value of derivatives in a net liability position		7
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered		$ 7

Investments in Debt and Equit_3

Investments in Debt and Equity Securities (Estimated Fair Value of Investments in Debt and Equity Securities) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale
Estimated Fair Value	$ 2,873
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	4,086	$ 3,682
Unrealized Holding Losses	277	395
Estimated Fair Value	9,672	9,051
Duke Energy Carolinas
Debt Securities, Available-for-sale
Estimated Fair Value	1,329
Progress Energy
Debt Securities, Available-for-sale
Estimated Fair Value	1,291
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	1,679	1,512
Unrealized Holding Losses	118	167
Estimated Fair Value	4,081	3,890
Duke Energy Progress
Debt Securities, Available-for-sale
Estimated Fair Value	977
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	1,592	1,432
Unrealized Holding Losses	98	142
Estimated Fair Value	3,646	3,439
Duke Energy Florida
Debt Securities, Available-for-sale
Estimated Fair Value	314
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	87	80
Unrealized Holding Losses	20	25
Estimated Fair Value	434	450
Duke Energy Indiana
Debt Securities, Available-for-sale
Estimated Fair Value	64
NDTF
Available-for-sale Securities
Cash and cash equivalents	161	215
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	4,048	3,658
Equity Securities, FV-NI, Accumulated Unrealized Loss	60	105
Equity securities, FV-NI	6,367	5,871
Debt Securities, Available-for-sale
Estimated Fair Value	2,595	2,550
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	4,061	3,661
Unrealized Holding Losses	252	359
Estimated Fair Value	9,123	8,636
NDTF \| Duke Energy Carolinas
Available-for-sale Securities
Cash and cash equivalents	69	117
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	2,375	2,147
Equity Securities, FV-NI, Accumulated Unrealized Loss	29	51
Equity securities, FV-NI	3,677	3,367
Debt Securities, Available-for-sale
Estimated Fair Value	1,329	1,298
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	2,382	2,149
Unrealized Holding Losses	134	192
Estimated Fair Value	5,075	4,782
NDTF \| Progress Energy
Available-for-sale Securities
Cash and cash equivalents	92	98
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	1,673	1,511
Equity Securities, FV-NI, Accumulated Unrealized Loss	31	54
Equity securities, FV-NI	2,690	2,504
Debt Securities, Available-for-sale
Estimated Fair Value	1,266	1,252
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	1,679	1,512
Unrealized Holding Losses	118	167
Estimated Fair Value	4,048	3,854
NDTF \| Duke Energy Progress
Available-for-sale Securities
Cash and cash equivalents	72	56
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	1,586	1,431
Equity Securities, FV-NI, Accumulated Unrealized Loss	31	54
Equity securities, FV-NI	2,590	2,411
Debt Securities, Available-for-sale
Estimated Fair Value	977	963
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	1,592	1,432
Unrealized Holding Losses	98	142
Estimated Fair Value	3,639	3,430
NDTF \| Duke Energy Florida
Available-for-sale Securities
Cash and cash equivalents	20	42
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	87	80
Equity securities, FV-NI	100	93
Debt Securities, Available-for-sale
Estimated Fair Value	289	289
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	87	80
Unrealized Holding Losses	20	25
Estimated Fair Value	409	424
Other Investments
Available-for-sale Securities
Cash and cash equivalents	134	22
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	25	21
Equity Securities, FV-NI, Accumulated Unrealized Loss	11	16
Equity securities, FV-NI	137	128
Debt Securities, Available-for-sale
Estimated Fair Value	278	265
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	25	21
Unrealized Holding Losses	25	36
Estimated Fair Value	549	415
Other Investments \| Progress Energy
Available-for-sale Securities
Cash and cash equivalents	8	11
Debt Securities, Available-for-sale
Estimated Fair Value	25	25
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Estimated Fair Value	33	36
Other Investments \| Duke Energy Progress
Available-for-sale Securities
Cash and cash equivalents	7	9
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Estimated Fair Value	7	9
Other Investments \| Duke Energy Florida
Available-for-sale Securities
Cash and cash equivalents		1
Debt Securities, Available-for-sale
Estimated Fair Value	25	25
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Estimated Fair Value	25	26
Other Investments \| Duke Energy Indiana
Available-for-sale Securities
Cash and cash equivalents	1	1
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	3	2
Equity Securities, FV-NI, Accumulated Unrealized Loss	11	16
Equity securities, FV-NI	85	79
Debt Securities, Available-for-sale
Estimated Fair Value	64	60
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	3	2
Unrealized Holding Losses	13	20
Estimated Fair Value	150	140
Corporate debt securities \| NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	3	1
Gross Unrealized Holding Losses	65	85
Estimated Fair Value	616	641
Corporate debt securities \| NDTF \| Duke Energy Carolinas
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	2	1
Gross Unrealized Holding Losses	47	62
Estimated Fair Value	384	401
Corporate debt securities \| NDTF \| Progress Energy
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1
Gross Unrealized Holding Losses	18	23
Estimated Fair Value	232	240
Corporate debt securities \| NDTF \| Duke Energy Progress
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1
Gross Unrealized Holding Losses	17	22
Estimated Fair Value	222	230
Corporate debt securities \| NDTF \| Duke Energy Florida
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	1	1
Estimated Fair Value	10	10
Corporate debt securities \| Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	10	12
Estimated Fair Value	87	84
Corporate debt securities \| Other Investments \| Duke Energy Indiana
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses		1
Estimated Fair Value	9	8
Municipal bonds \| NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1
Gross Unrealized Holding Losses	27	39
Estimated Fair Value	337	330
Municipal bonds \| NDTF \| Duke Energy Carolinas
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	5	10
Estimated Fair Value	56	64
Municipal bonds \| NDTF \| Progress Energy
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1
Gross Unrealized Holding Losses	22	29
Estimated Fair Value	281	266
Municipal bonds \| NDTF \| Duke Energy Progress
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1
Gross Unrealized Holding Losses	22	29
Estimated Fair Value	281	266
Municipal bonds \| Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	2	3
Estimated Fair Value	80	78
Municipal bonds \| Other Investments \| Progress Energy
Debt Securities, Available-for-sale
Estimated Fair Value	25	25
Municipal bonds \| Other Investments \| Duke Energy Florida
Debt Securities, Available-for-sale
Estimated Fair Value	25	25
Municipal bonds \| Other Investments \| Duke Energy Indiana
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	2	3
Estimated Fair Value	46	45
U.S. government bonds \| NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	9	2
Gross Unrealized Holding Losses	85	112
Estimated Fair Value	1,495	1,423
U.S. government bonds \| NDTF \| Duke Energy Carolinas
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	5	1
Gross Unrealized Holding Losses	38	51
Estimated Fair Value	746	685
U.S. government bonds \| NDTF \| Progress Energy
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	4	1
Gross Unrealized Holding Losses	47	61
Estimated Fair Value	749	738
U.S. government bonds \| NDTF \| Duke Energy Progress
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	4	1
Gross Unrealized Holding Losses	28	37
Estimated Fair Value	470	460
U.S. government bonds \| NDTF \| Duke Energy Florida
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	19	24
Estimated Fair Value	279	278
U.S. government bonds \| Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses		2
Estimated Fair Value	69	62
U.S. government bonds \| Other Investments \| Duke Energy Indiana
Debt Securities, Available-for-sale
Estimated Fair Value	9	7
Other debt securities \| NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	15	18
Estimated Fair Value	147	156
Other debt securities \| NDTF \| Duke Energy Carolinas
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	15	18
Estimated Fair Value	143	148
Other debt securities \| NDTF \| Progress Energy
Debt Securities, Available-for-sale
Estimated Fair Value	4	8
Other debt securities \| NDTF \| Duke Energy Progress
Debt Securities, Available-for-sale
Estimated Fair Value	4	7
Other debt securities \| NDTF \| Duke Energy Florida
Debt Securities, Available-for-sale
Estimated Fair Value		1
Other debt securities \| Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	2	3
Estimated Fair Value	$ 42	$ 41

Investments in Debt and Equit_4

Investments in Debt and Equity Securities (Realized Gains and Losses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
FV-NI:
Realized gains	$ 26	$ 111
Realized losses	46	85
AFS:
Realized gains	8	4
Realized losses	32	23
Duke Energy Carolinas
FV-NI:
Realized gains	18	75
Realized losses	29	49
AFS:
Realized gains	5	3
Realized losses	20	16
Progress Energy
FV-NI:
Realized gains	8	36
Realized losses	17	36
AFS:
Realized gains	3	1
Realized losses	12	6
Duke Energy Progress
FV-NI:
Realized gains	8	36
Realized losses	17	35
AFS:
Realized gains	3	1
Realized losses	$ 12	$ 5

Investments in Debt and Equit_5

Investments in Debt and Equity Securities (Maturities) (Details) $ in Millions	Mar. 31, 2023 USD ($)
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	$ 115
Due after one through five years	793
Due after five through 10 years	522
Due after 10 years	1,443
Total	2,873
Duke Energy Carolinas
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	5
Due after one through five years	277
Due after five through 10 years	262
Due after 10 years	785
Total	1,329
Progress Energy
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	96
Due after one through five years	424
Due after five through 10 years	207
Due after 10 years	564
Total	1,291
Duke Energy Progress
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	19
Due after one through five years	238
Due after five through 10 years	194
Due after 10 years	526
Total	977
Duke Energy Florida
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	77
Due after one through five years	186
Due after five through 10 years	13
Due after 10 years	38
Total	314
Duke Energy Indiana
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	6
Due after one through five years	23
Due after five through 10 years	11
Due after 10 years	24
Total	$ 64

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Measurement Amounts for Assets and Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	$ 2,873
Derivative assets	268	$ 795
Total assets	9,940	9,846
Derivative liabilities	(603)	(437)
Net assets (liabilities)	9,337	9,409
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1	1
Total assets	7,641	7,030
Derivative liabilities	(19)	(16)
Net assets (liabilities)	7,622	7,014
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	255	760
Total assets	2,246	2,740
Derivative liabilities	(584)	(421)
Net assets (liabilities)	1,662	2,319
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	12	34
Total assets	12	34
Net assets (liabilities)	12	34
Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	41	42
Net assets (liabilities)	41	42
NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	161	215
Equity securities, FV-NI	6,367	5,871
Debt securities, available-for-sale	2,595	2,550
NDTF \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	161	215
Debt securities, available-for-sale	822	780
NDTF \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,773	1,770
NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	6,367	5,871
NDTF equity securities \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	6,326	5,829
NDTF equity securities \| Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	41	42
Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	134	22
Equity securities, FV-NI	137	128
Debt securities, available-for-sale	278	265
Other Investments \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	134	22
Equity securities, FV-NI	137	128
Debt securities, available-for-sale	60	55
Other Investments \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	218	210
Duke Energy Carolinas
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,329
Derivative assets	80	330
Total assets	5,155	5,112
Derivative liabilities	(201)	(127)
Net assets (liabilities)	4,954	4,985
Duke Energy Carolinas \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	4,077	3,765
Net assets (liabilities)	4,077	3,765
Duke Energy Carolinas \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	80	330
Total assets	1,037	1,305
Derivative liabilities	(201)	(127)
Net assets (liabilities)	836	1,178
Duke Energy Carolinas \| Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	41	42
Net assets (liabilities)	41	42
Duke Energy Carolinas \| NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	69	117
Equity securities, FV-NI	3,677	3,367
Debt securities, available-for-sale	1,329	1,298
Duke Energy Carolinas \| NDTF \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	69	117
Debt securities, available-for-sale	372	323
Duke Energy Carolinas \| NDTF \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	957	975
Duke Energy Carolinas \| NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	3,677	3,367
Duke Energy Carolinas \| NDTF equity securities \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	3,636	3,325
Duke Energy Carolinas \| NDTF equity securities \| Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	41	42
Progress Energy
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,291
Derivative assets	88	248
Total assets	4,169	4,138
Derivative liabilities	(153)	(66)
Net assets (liabilities)	4,016	4,072
Progress Energy \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	3,240	3,070
Net assets (liabilities)	3,240	3,070
Progress Energy \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	88	248
Total assets	929	1,068
Derivative liabilities	(153)	(66)
Net assets (liabilities)	776	1,002
Progress Energy \| NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	92	98
Equity securities, FV-NI	2,690	2,504
Debt securities, available-for-sale	1,266	1,252
Progress Energy \| NDTF \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	92	98
Debt securities, available-for-sale	450	457
Progress Energy \| NDTF \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	816	795
Progress Energy \| NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	2,690	2,504
Progress Energy \| NDTF equity securities \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	2,690	2,504
Progress Energy \| Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	8	11
Debt securities, available-for-sale	25	25
Progress Energy \| Other Investments \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	8	11
Progress Energy \| Other Investments \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	25	25
Duke Energy Progress
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	977
Derivative assets	82	230
Total assets	3,728	3,669
Derivative liabilities	(149)	(48)
Net assets (liabilities)	3,579	3,621
Duke Energy Progress \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	2,888	2,701
Net assets (liabilities)	2,888	2,701
Duke Energy Progress \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	82	230
Total assets	840	968
Derivative liabilities	(149)	(48)
Net assets (liabilities)	691	920
Duke Energy Progress \| NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	72	56
Equity securities, FV-NI	2,590	2,411
Debt securities, available-for-sale	977	963
Duke Energy Progress \| NDTF \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	72	56
Debt securities, available-for-sale	219	225
Duke Energy Progress \| NDTF \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	758	738
Duke Energy Progress \| NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	2,590	2,411
Duke Energy Progress \| NDTF equity securities \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	2,590	2,411
Duke Energy Progress \| Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	7	9
Duke Energy Progress \| Other Investments \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	7	9
Duke Energy Florida
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	314
Derivative assets	6	17
Total assets	440	467
Derivative liabilities	(3)	(19)
Net assets (liabilities)	437	448
Duke Energy Florida \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	351	368
Net assets (liabilities)	351	368
Duke Energy Florida \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	6	17
Total assets	89	99
Derivative liabilities	(3)	(19)
Net assets (liabilities)	86	80
Duke Energy Florida \| NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	20	42
Equity securities, FV-NI	100	93
Debt securities, available-for-sale	289	289
Duke Energy Florida \| NDTF \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	20	42
Debt securities, available-for-sale	231	232
Duke Energy Florida \| NDTF \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	58	57
Duke Energy Florida \| NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	100	93
Duke Energy Florida \| NDTF equity securities \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	100	93
Duke Energy Florida \| Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		1
Debt securities, available-for-sale	25	25
Duke Energy Florida \| Other Investments \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		1
Duke Energy Florida \| Other Investments \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	25	25
Duke Energy Indiana
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	64
Derivative assets	11	110
Total assets	161	250
Derivative liabilities	(28)	(16)
Net assets (liabilities)	133	234
Duke Energy Indiana \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	86	80
Derivative liabilities	(19)	(16)
Net assets (liabilities)	67	64
Duke Energy Indiana \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		81
Total assets	64	141
Derivative liabilities	(9)
Net assets (liabilities)	55	141
Duke Energy Indiana \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	11	29
Total assets	11	29
Net assets (liabilities)	11	29
Duke Energy Indiana \| Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1	1
Equity securities, FV-NI	85	79
Debt securities, available-for-sale	64	60
Duke Energy Indiana \| Other Investments \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1	1
Equity securities, FV-NI	85	79
Duke Energy Indiana \| Other Investments \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	64	60
Piedmont
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1	0
Derivative liabilities	(144)	(168)
Net assets (liabilities)	(143)	(168)
Piedmont \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1	0
Net assets (liabilities)	1	0
Piedmont \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	(144)	(168)
Net assets (liabilities)	$ (144)	$ (168)

Fair Value Measurements (Reconc

Fair Value Measurements (Reconciliation of Assets and Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Derivatives (net)
Balance at beginning of period	$ 34	$ 24
Purchases, sales, issuances and settlements:
Settlements	(20)	(7)
Total losses included on the Condensed Consolidated Balance Sheet	(2)	(7)
Balance at end of period	12	10
Duke Energy Indiana
Derivatives (net)
Balance at beginning of period	29	22
Purchases, sales, issuances and settlements:
Settlements	(19)	(6)
Total losses included on the Condensed Consolidated Balance Sheet	1	(6)
Balance at end of period	$ 11	$ 10

Fair Value Measurements (Quanti

Fair Value Measurements (Quantitative Level 3 Fair Value Disclosures) (Details) $ in Millions	Mar. 31, 2023 USD ($) $ / MWh	Dec. 31, 2022 USD ($) $ / MWh	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) \| $	$ 12	$ 34	$ 10	$ 24
Duke Energy Ohio \| FTRs \| RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) \| $	$ 1	$ 5
Duke Energy Ohio \| FTRs \| RTO auction pricing \| Minimum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	(0.19)	0.89
Duke Energy Ohio \| FTRs \| RTO auction pricing \| Maximum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	2.71	6.25
Duke Energy Ohio \| FTRs \| RTO auction pricing \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	1.08	3.35
Duke Energy Indiana
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) \| $	$ 11	$ 29	$ 10	$ 22
Duke Energy Indiana \| FTRs \| RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) \| $	$ 11	$ 29
Duke Energy Indiana \| FTRs \| RTO auction pricing \| Minimum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	0.03	0.09
Duke Energy Indiana \| FTRs \| RTO auction pricing \| Maximum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	14.88	21.79
Duke Energy Indiana \| FTRs \| RTO auction pricing \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	2.63	2.74

Fair Value Measurements (Other

Fair Value Measurements (Other Fair Value Disclosure) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 72,437	$ 69,751
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	66,455	61,986
Piedmont Natural Gas and Progress Energy
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized debt discount (premium), net	1,150	1,170
Duke Energy Carolinas \| Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	15,105	14,266
Duke Energy Carolinas \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	14,176	12,943
Progress Energy \| Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	23,371	22,439
Progress Energy \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	21,974	20,467
Duke Energy Progress \| Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	12,047	11,087
Duke Energy Progress \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	10,911	9,689
Duke Energy Florida \| Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	9,683	9,709
Duke Energy Florida \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	9,242	8,991
Duke Energy Ohio \| Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	3,991	3,245
Duke Energy Ohio \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	3,768	2,927
Duke Energy Indiana \| Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	4,503	4,307
Duke Energy Indiana \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	4,265	3,913
Piedmont \| Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	3,364	3,363
Piedmont \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 3,014	$ 2,940

Variable Interest Entities (Nar

Variable Interest Entities (Narrative) (Details) - VIE primary beneficiary - USD ($)	1 Months Ended	3 Months Ended
	Nov. 30, 2021	Mar. 31, 2023
Variable Interest Entities [Line Items]
Variable interest entity, financial or other support, amount		$ 0
CRC
Variable Interest Entities [Line Items]
Percent of proceeds received as cash		75%
Percent of proceeds received as subordinated note		25%
Minimum equity balance required by Cinergy Receivables		$ 3,000,000
DECNCSF \| Duke Energy Carolinas
Variable Interest Entities [Line Items]
Proceeds from issuance of senior secured bonds	$ 237,000,000
DEPNCSF \| Duke Energy Progress
Variable Interest Entities [Line Items]
Proceeds from issuance of senior secured bonds	$ 770,000,000

Variable Interest Entities (Sch

Variable Interest Entities (Schedule of Accounts Receivable Securitizations) (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Variable Interest Entities [Line Items]
Long-Term Debt	$ 69,107,000,000	$ 65,873,000,000
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Long-Term Debt	14,787,000,000	12,948,000,000
Duke Energy Progress
Variable Interest Entities [Line Items]
Long-Term Debt	11,527,000,000	10,568,000,000
Duke Energy Florida
Variable Interest Entities [Line Items]
Long-Term Debt	9,353,000,000	9,381,000,000
CRC \| VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	350,000,000
Long-Term Debt	350,000,000	350,000,000
Accounts receivable from securitization	784,000,000	917,000,000
DERF \| Duke Energy Carolinas \| VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	500,000,000
Long-Term Debt	500,000,000	471,000,000
Accounts receivable from securitization	782,000,000	928,000,000
DEPR \| Duke Energy Progress \| VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	400,000,000
Long-Term Debt	400,000,000	400,000,000
Accounts receivable from securitization	654,000,000	793,000,000
DEFR \| Duke Energy Florida \| VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	325,000,000
Long-Term Debt	250,000,000	250,000,000
Accounts receivable from securitization	$ 443,000,000	$ 490,000,000

Variable Interest Entities (S_2

Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Variable Interest Entities [Line Items]
Regulatory Assets: Current	$ 3,502	$ 3,485
Current Assets: Other	452	973
Other Noncurrent Assets: Regulatory assets	14,702	14,645
Public Utilities, Property, Plant and Equipment, Plant in Service	166,096	163,839
Accumulated depreciation and amortization	(53,162)	(52,100)
Other	3,426	3,400
Current Liabilities: Other	1,970	2,167
Current maturities of long-term debt	3,330	3,878
Long-Term Debt	69,107	65,873
Asset Retirement Obligations, Noncurrent	11,987	11,955
Deferred Credits and Other Liabilities	1,417	1,502
Duke Energy Florida
Variable Interest Entities [Line Items]
Regulatory Assets: Current	784	1,143
Current Assets: Other	67	108
Other Noncurrent Assets: Regulatory assets	2,605	2,422
Public Utilities, Property, Plant and Equipment, Plant in Service	26,448	25,940
Accumulated depreciation and amortization	(6,552)	(6,377)
Other	393	372
Current Liabilities: Other	320	363
Current maturities of long-term debt	330	328
Long-Term Debt	9,353	9,381
Asset Retirement Obligations, Noncurrent	346	357
Deferred Credits and Other Liabilities	77	84
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Regulatory Assets: Current	1,311	1,095
Current Assets: Other	62	216
Other Noncurrent Assets: Regulatory assets	4,309	4,293
Public Utilities, Property, Plant and Equipment, Plant in Service	55,422	54,650
Accumulated depreciation and amortization	(19,082)	(18,669)
Other	998	1,036
Current Liabilities: Other	572	580
Current maturities of long-term debt	18	1,018
Long-Term Debt	14,787	12,948
Asset Retirement Obligations, Noncurrent	5,148	5,121
Deferred Credits and Other Liabilities	534	527
Duke Energy Progress
Variable Interest Entities [Line Items]
Regulatory Assets: Current	764	690
Current Assets: Other	57	174
Other Noncurrent Assets: Regulatory assets	4,817	4,724
Public Utilities, Property, Plant and Equipment, Plant in Service	39,396	38,875
Accumulated depreciation and amortization	(14,452)	(14,201)
Other	659	650
Current Liabilities: Other	412	384
Current maturities of long-term debt	370	369
Long-Term Debt	11,527	10,568
Asset Retirement Obligations, Noncurrent	5,552	5,535
Deferred Credits and Other Liabilities	89	76
DEFPF \| Duke Energy Florida \| VIE primary beneficiary
Variable Interest Entities [Line Items]
Receivables of VIEs	4	6
Regulatory Assets: Current	55	55
Current Assets: Other	18	41
Other Noncurrent Assets: Regulatory assets	814	826
Current Liabilities: Other	2	9
Current maturities of long-term debt	57	56
Long-Term Debt	859	890
DECNCSF \| Duke Energy Carolinas \| VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	12	12
Current Assets: Other	5	8
Other Noncurrent Assets: Regulatory assets	205	208
Other	1	1
Current Liabilities: Other	1	3
Current maturities of long-term debt	10	10
Long-Term Debt	213	219
DEPNCSF \| Duke Energy Progress \| VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	39	39
Current Assets: Other	15	29
Other Noncurrent Assets: Regulatory assets	672	681
Other	4	2
Current Liabilities: Other	4	8
Current maturities of long-term debt	34	34
Long-Term Debt	$ 697	$ 714

Variable Interest Entities (S_3

Variable Interest Entities (Schedule of Non-Consolidated VIEs) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	$ 465	$ 455
Other noncurrent assets	3,426	3,400
Total Assets	178,833	178,086
Other current liabilities	1,970	2,167
Other	1,417	1,502
Duke Energy Ohio
Variable Interest Entities [Line Items]
Other noncurrent assets	74	71
Total Assets	11,693	11,506
Other current liabilities	66	74
Other	95	96
Duke Energy Ohio \| VIE not primary beneficiary
Variable Interest Entities [Line Items]
Receivables from affiliated companies	164	198
Total Assets	164	198
Net assets	164	198
Duke Energy Indiana
Variable Interest Entities [Line Items]
Other noncurrent assets	265	254
Total Assets	14,419	14,654
Other current liabilities	145	161
Other	31	65
Duke Energy Indiana \| VIE not primary beneficiary
Variable Interest Entities [Line Items]
Receivables from affiliated companies	221	317
Total Assets	221	317
Net assets	221	317
Pipeline Investments \| VIE not primary beneficiary
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	49	43
Other noncurrent assets	46	45
Total Assets	95	88
Other current liabilities	52	59
Other	49	47
Total liabilities	101	106
Net assets	$ (6)	$ (18)

Variable Interest Entities (Rec

Variable Interest Entities (Receivables Sold) (Details) - VIE not primary beneficiary - CRC - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Duke Energy Ohio
Variable Interest Entities [Line Items]
Receivables sold	$ 369	$ 423
Less: Retained interests	164	198
Net receivables sold	205	225
Duke Energy Indiana
Variable Interest Entities [Line Items]
Receivables sold	426	508
Less: Retained interests	221	317
Net receivables sold	$ 205	$ 191

Variable Interest Entities (Sal

Variable Interest Entities (Sales and Cash Flows) (Details) - VIE not primary beneficiary - CRC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Duke Energy Ohio
Sales
Receivables sold	$ 725	$ 663
Loss recognized on sale	9	3
Cash flows
Cash proceeds from receivables sold	750	674
Return received on retained interests	6	1
Duke Energy Indiana
Sales
Receivables sold	942	782
Loss recognized on sale	10	4
Cash flows
Cash proceeds from receivables sold	1,028	795
Return received on retained interests	$ 8	$ 2

Revenue (Remaining Performance

Revenue (Remaining Performance Obligations) (Details) $ in Millions	Mar. 31, 2023 USD ($)
Progress Energy
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 166
Progress Energy \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	9 months
Revenue, remaining performance obligation, amount	$ 43
Progress Energy \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 66
Progress Energy \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
Progress Energy \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
Progress Energy \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
Progress Energy \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 36
Duke Energy Progress
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 14
Duke Energy Progress \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	9 months
Revenue, remaining performance obligation, amount	$ 6
Duke Energy Progress \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 8
Duke Energy Progress \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Progress \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Progress \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Progress \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Duke Energy Florida
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 152
Duke Energy Florida \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	9 months
Revenue, remaining performance obligation, amount	$ 37
Duke Energy Florida \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 58
Duke Energy Florida \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
Duke Energy Florida \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
Duke Energy Florida \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
Duke Energy Florida \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 36
Duke Energy Indiana
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 70
Duke Energy Indiana \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	9 months
Revenue, remaining performance obligation, amount	$ 10
Duke Energy Indiana \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 16
Duke Energy Indiana \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 17
Duke Energy Indiana \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 15
Duke Energy Indiana \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
Duke Energy Indiana \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 5
Piedmont
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 515
Piedmont \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	9 months
Revenue, remaining performance obligation, amount	$ 51
Piedmont \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 62
Piedmont \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 61
Piedmont \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 51
Piedmont \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 49
Piedmont \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 241

Revenue (Remaining Performanc_2

Revenue (Remaining Performance Obligations Total) (Details) $ in Millions	Mar. 31, 2023 USD ($)
Progress Energy
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 166
Duke Energy Progress
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	14
Duke Energy Florida
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	152
Duke Energy Indiana
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	70
Piedmont
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 515

Revenue (Disaggregation of Reve

Revenue (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 7,101	$ 6,991
Revenue from sources other than contracts with customers	175	20
Total operating revenues	7,276	7,011
Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	6,267	5,971
Total operating revenues	6,381	5,995
Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,851	2,767
Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,831	1,604
Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	891	772
Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	550	626
Electric Utilities and Infrastructure \| Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	144	202
Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	827	1,013
Total operating revenues	888	1,009
Gas Utilities and Infrastructure \| Gas Utilities and Infrastructure \| Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	507	572
Gas Utilities and Infrastructure \| Gas Utilities and Infrastructure \| Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	233	269
Gas Utilities and Infrastructure \| Gas Utilities and Infrastructure \| Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	47	57
Gas Utilities and Infrastructure \| Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	40	115
Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	7	7
Duke Energy Carolinas
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,921	1,875
Revenue from sources other than contracts with customers	13	13
Total operating revenues	1,934	1,888
Duke Energy Carolinas \| Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,921	1,875
Duke Energy Carolinas \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	824	831
Duke Energy Carolinas \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	588	544
Duke Energy Carolinas \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	296	276
Duke Energy Carolinas \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	135	113
Duke Energy Carolinas \| Electric Utilities and Infrastructure \| Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	78	111
Progress Energy
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3,003	2,986
Revenue from sources other than contracts with customers	45	6
Total operating revenues	3,048	2,992
Progress Energy \| Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3,003	2,986
Progress Energy \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,421	1,368
Progress Energy \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	841	726
Progress Energy \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	272	270
Progress Energy \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	348	411
Progress Energy \| Electric Utilities and Infrastructure \| Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	121	211
Duke Energy Progress
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,529	1,631
Revenue from sources other than contracts with customers	4	1
Total operating revenues	1,533	1,632
Duke Energy Progress \| Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,529	1,631
Duke Energy Progress \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	607	624
Duke Energy Progress \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	358	325
Duke Energy Progress \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	177	194
Duke Energy Progress \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	319	349
Duke Energy Progress \| Electric Utilities and Infrastructure \| Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	68	139
Duke Energy Florida
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,474	1,355
Revenue from sources other than contracts with customers	36
Total operating revenues	1,510	1,355
Duke Energy Florida \| Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,474	1,355
Duke Energy Florida \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	814	744
Duke Energy Florida \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	483	401
Duke Energy Florida \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	95	76
Duke Energy Florida \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	29	62
Duke Energy Florida \| Electric Utilities and Infrastructure \| Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	53	72
Duke Energy Ohio
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	711	632
Revenue from sources other than contracts with customers	(2)	6
Total operating revenues	709	638
Duke Energy Ohio \| Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	476	406
Duke Energy Ohio \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	234	211
Duke Energy Ohio \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	135	116
Duke Energy Ohio \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	71	35
Duke Energy Ohio \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	9	23
Duke Energy Ohio \| Electric Utilities and Infrastructure \| Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	27	21
Duke Energy Ohio \| Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	235	226
Duke Energy Ohio \| Gas Utilities and Infrastructure \| Gas Utilities and Infrastructure \| Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	162	149
Duke Energy Ohio \| Gas Utilities and Infrastructure \| Gas Utilities and Infrastructure \| Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	58	64
Duke Energy Ohio \| Gas Utilities and Infrastructure \| Gas Utilities and Infrastructure \| Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	9	7
Duke Energy Ohio \| Gas Utilities and Infrastructure \| Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	6	6
Duke Energy Indiana
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	966	807
Revenue from sources other than contracts with customers	9	15
Total operating revenues	975	822
Duke Energy Indiana \| Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	966	807
Duke Energy Indiana \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	372	354
Duke Energy Indiana \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	270	218
Duke Energy Indiana \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	251	192
Duke Energy Indiana \| Electric Utilities and Infrastructure \| Electric Utilities and Infrastructure \| Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	58	79
Duke Energy Indiana \| Electric Utilities and Infrastructure \| Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	15	(36)
Piedmont
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	599	794
Revenue from sources other than contracts with customers	76	11
Total operating revenues	675	805
Piedmont \| Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	599	794
Piedmont \| Gas Utilities and Infrastructure \| Gas Utilities and Infrastructure \| Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	345	423
Piedmont \| Gas Utilities and Infrastructure \| Gas Utilities and Infrastructure \| Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	175	204
Piedmont \| Gas Utilities and Infrastructure \| Gas Utilities and Infrastructure \| Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	37	50
Piedmont \| Gas Utilities and Infrastructure \| Gas Utilities and Infrastructure \| Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	23	24
Piedmont \| Gas Utilities and Infrastructure \| Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 19	$ 93

Revenue (Reserve for Credit Los

Revenue (Reserve for Credit Losses for Trade and Other Receivables) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 216	$ 121
Cumulative Change in Accounting Principle	214	139
Write-Offs	(42)	(23)
Credit Loss Expense	16	24
Other Adjustments	24	17
Ending balance	214	139
Duke Energy Carolinas
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	68	42
Cumulative Change in Accounting Principle	70	52
Write-Offs	(20)	(9)
Credit Loss Expense	7	5
Other Adjustments	15	14
Ending balance	70	52
Progress Energy
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	81	36
Cumulative Change in Accounting Principle	75	51
Write-Offs	(22)	(10)
Credit Loss Expense	6	12
Other Adjustments	10	13
Ending balance	75	51
Duke Energy Progress
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	44	21
Cumulative Change in Accounting Principle	45	31
Write-Offs	(9)	(2)
Credit Loss Expense	1	4
Other Adjustments	9	8
Ending balance	45	31
Duke Energy Florida
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	36	16
Cumulative Change in Accounting Principle	30	21
Write-Offs	(12)	(8)
Credit Loss Expense	5	8
Other Adjustments	1	5
Ending balance	30	21
Duke Energy Ohio
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	6	4
Cumulative Change in Accounting Principle	7	4
Credit Loss Expense	1
Ending balance	7	4
Duke Energy Indiana
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	4	3
Cumulative Change in Accounting Principle	4	3
Ending balance	4	3
Piedmont
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	14	15
Cumulative Change in Accounting Principle	14	17
Write-Offs	(1)	(1)
Credit Loss Expense	1	3
Ending balance	$ 14	$ 17

Revenue (Aging of Trade Receiva

Revenue (Aging of Trade Receivables) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	$ 1,070	$ 1,457
Current	2,018	2,347
Deferred Payment Arrangements	144	160
Trade and Other Receivables	3,884	4,631
30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	148	123
60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	33	74
Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	254	261
Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	217	209
Duke Energy Carolinas
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	408	486
Current	519	577
Deferred Payment Arrangements	46	57
Trade and Other Receivables	1,138	1,334
Duke Energy Carolinas \| 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	32	23
Duke Energy Carolinas \| 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	9	25
Duke Energy Carolinas \| Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	64	96
Duke Energy Carolinas \| Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	60	70
Progress Energy
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	284	355
Current	892	1,059
Deferred Payment Arrangements	51	62
Trade and Other Receivables	1,491	1,689
Progress Energy \| 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	83	61
Progress Energy \| 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	13	18
Progress Energy \| Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	103	60
Progress Energy \| Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	65	74
Duke Energy Progress
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	178	232
Current	476	637
Deferred Payment Arrangements	32	35
Trade and Other Receivables	858	1,004
Duke Energy Progress \| 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	72	49
Duke Energy Progress \| 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	8	9
Duke Energy Progress \| Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	68	15
Duke Energy Progress \| Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	24	27
Duke Energy Florida
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	106	123
Current	414	417
Deferred Payment Arrangements	19	27
Trade and Other Receivables	631	680
Duke Energy Florida \| 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	11	12
Duke Energy Florida \| 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	5	9
Duke Energy Florida \| Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	35	45
Duke Energy Florida \| Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	41	47
Duke Energy Ohio
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	3	20
Current	14	15
Deferred Payment Arrangements	4	4
Trade and Other Receivables	81	79
Duke Energy Ohio \| CRC
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	103	148
Duke Energy Ohio \| 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	5	6
Duke Energy Ohio \| 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	2	3
Duke Energy Ohio \| Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	5	5
Duke Energy Ohio \| Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	48	26
Duke Energy Indiana
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	20	28
Current	46	52
Trade and Other Receivables	94	116
Duke Energy Indiana \| CRC
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	195	260
Duke Energy Indiana \| 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	2	2
Duke Energy Indiana \| 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	1	11
Duke Energy Indiana \| Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	9	17
Duke Energy Indiana \| Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	16	6
Piedmont
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	57	160
Current	168	265
Deferred Payment Arrangements	1	1
Trade and Other Receivables	259	450
Piedmont \| 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	10	3
Piedmont \| 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	2	2
Piedmont \| Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	18	15
Piedmont \| Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	$ 3	$ 4

Stockholders' Equity (Earnings

Stockholders' Equity (Earnings Per Share Data) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Class of Stock [Line Items]
Net Income Available to Duke Energy Corporation Common Stockholders	$ 765	$ 818
Accumulated preferred stock dividends adjustment	12	12
Less: Impact of participating securities	1	1
Income from continuing operations available to Duke Energy common stockholders	921	817
Loss from discontinued operations, net of tax	(209)	(15)
Add: Net loss attributable to noncontrolling interest included in discontinued operations	64	27
Discontinued operations	$ (145)	$ 12
Weighted average common shares outstanding – basic (in shares)	770	770
Weighted average common shares outstanding – diluted (in shares)	770	770
Basic (in usd per share)	$ 1.20	$ 1.06
Diluted (in usd per share)	1.20	1.06
EPS from continuing operations available to Duke Energy common stockholders
Basic (usd per share)	(0.19)	0.02
Diluted (usd per share)	$ (0.19)	$ 0.02
Potentially dilutive items excluded from the calculation (in shares)	2	2
Common Stock
EPS from continuing operations available to Duke Energy common stockholders
Dividends declared per common share (in usd per share)	$ 1.005	$ 0.985
Preferred stock, Series A
EPS from continuing operations available to Duke Energy common stockholders
Dividends declared on preferred stock per depositary share (in usd per share)	$ 0.359	0.359
Cumulative dividend rate per annum	5.75%
Liquidation preference per share (in usd per share)	$ 25
Preferred stock, Series B
EPS from continuing operations available to Duke Energy common stockholders
Dividends declared on preferred stock per depositary share (in usd per share)	$ 24.375	$ 24.375
Cumulative dividend rate per annum	4.875%
Liquidation preference per share (in usd per share)	$ 1,000

Employee Benefit Plans (Compone

Employee Benefit Plans (Components of Net Periodic Pension Costs) (Details) - Qualified Pension Plans - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 30	$ 40
Interest cost on projected benefit obligation	86	58
Expected return on plan assets	(147)	(140)
Amortization of actuarial loss	2	24
Amortization of prior service credit	(3)	(5)
Amortization of settlement charges	5	2
Net periodic pension costs	(27)	(21)
Duke Energy Carolinas
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	10	12
Interest cost on projected benefit obligation	21	14
Expected return on plan assets	(40)	(38)
Amortization of actuarial loss	0	5
Amortization of prior service credit	0	(1)
Amortization of settlement charges	2	1
Net periodic pension costs	(7)	(7)
Progress Energy
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	9	12
Interest cost on projected benefit obligation	27	18
Expected return on plan assets	(50)	(46)
Amortization of actuarial loss	1	6
Amortization of settlement charges	1	1
Net periodic pension costs	(12)	(9)
Duke Energy Progress
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	5	7
Interest cost on projected benefit obligation	12	8
Expected return on plan assets	(23)	(22)
Amortization of actuarial loss	0	3
Amortization of settlement charges	1
Net periodic pension costs	(5)	(4)
Duke Energy Florida
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	3	4
Interest cost on projected benefit obligation	14	10
Expected return on plan assets	(26)	(24)
Amortization of actuarial loss	1	3
Net periodic pension costs	(8)	(7)
Duke Energy Ohio
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	1
Interest cost on projected benefit obligation	4	3
Expected return on plan assets	(6)	(5)
Amortization of actuarial loss		1
Net periodic pension costs	(1)
Duke Energy Indiana
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	2
Interest cost on projected benefit obligation	7	5
Expected return on plan assets	(10)	(9)
Amortization of actuarial loss	1	2
Net periodic pension costs	(1)
Piedmont
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	1
Interest cost on projected benefit obligation	2	2
Expected return on plan assets	(5)	(6)
Amortization of actuarial loss		2
Amortization of prior service credit	(2)	(2)
Amortization of settlement charges	1
Net periodic pension costs	$ (3)	$ (3)

Income Taxes (Effective Tax Rat

Income Taxes (Effective Tax Rates) (Details)	3 Months Ended
Income Taxes (Effective Tax Rates) (Details)	Mar. 31, 2023	Mar. 31, 2022
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	13.80%	2.90%
Duke Energy Carolinas
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	11.40%	7.40%
Progress Energy
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	16.70%	15.90%
Duke Energy Progress
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	14.60%	14%
Duke Energy Florida
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	19.90%	20.10%
Duke Energy Ohio
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	16.70%	(266.70%)
Duke Energy Indiana
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	17.20%	31.90%
Piedmont
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	17.70%	13.40%