OGE Energy (OGE) 10-K22 Feb 232022 FY Annual reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information Document - USD ($)	12 Months Ended
Document and Entity Information Document - USD ($)	Dec. 31, 2022	Jan. 31, 2023	Jun. 30, 2022
Entity Information [Line Items]
Entity Registrant Name	OGE ENERGY CORP.
Entity Central Index Key	0001021635
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Period End Date	Dec. 31, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Incorporation, State or Country Code	OK
Entity Tax Identification Number	73-1481638
Entity Address, Address Line One	321 North Harvey
Entity Address, Address Line Two	P.O. Box 321
Trading Symbol	OGE
Security Exchange Name	NYSE
Entity Interactive Data Current	Yes
City Area Code	405
Local Phone Number	553-3000
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	73101-0321
Entity File Number	1-12579
Title of 12(b) Security	Common Stock
Entity Address, City or Town	Oklahoma City
Share Price			$ 38.56
Document Transition Report	false
Document Annual Report	true
ICFR Auditor Attestation Flag	true
Document Type	10-K
Entity Common Stock, Shares Outstanding		200,229,215	200,202,672
Entity Public Float			$ 7,719,815,032
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE The Proxy Statement for OGE Energy Corp.'s 2023 annual meeting of shareowners is incorporated by reference into Part III of this Form 10-K. This combined Form 10-K represents separate filings by OGE Energy Corp. and Oklahoma Gas and Electric Company. Information contained herein related to an individual registrant is filed by such registrant on its own behalf. Oklahoma Gas and Electric Company makes no representations as to the information relating to OGE Energy Corp.'s other operations. Oklahoma Gas and Electric Company meets the conditions set forth in General Instruction I(1)(a) and (b) of Form 10-K and is therefore filing this form with the reduced disclosure format permitted by General Instruction I(2).
Auditor Name	Ernst & Young LLP
Auditor Firm ID	42
Auditor Location	Oklahoma City, Oklahoma
OG&E [Member]
Entity Information [Line Items]
Entity Registrant Name	OKLAHOMA GAS AND ELECTRIC COMPANY
Entity Central Index Key	0000074145
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Tax Identification Number	73-0382390
Entity Interactive Data Current	Yes
Entity File Number	1-1097
ICFR Auditor Attestation Flag	true
Entity Common Stock, Shares Outstanding		40,378,745
Auditor Name	Ernst & Young LLP
Auditor Firm ID	42
Auditor Location	Oklahoma City, Oklahoma
Enable Midstream [Member]
Entity Information [Line Items]
Auditor Name	Deloitte & Touche LLP
Auditor Firm ID	34
Auditor Location	Oklahoma City, Oklahoma

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues from contracts with customers	$ 3,304.2	$ 3,588.7	$ 2,069.8
Other revenues	71.5	65	52.5
OPERATING REVENUES
Operating revenues	3,375.7	3,653.7	2,122.3
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE	1,662.4	2,127.6	644.6
OPERATING EXPENSES
Other operation and maintenance	501.4	463.1	462.8
Depreciation and amortization	460.9	416	391.3
Taxes other than income	101.5	102.8	101.4
Operating expenses	1,063.8	981.9	955.5
OPERATING INCOME	649.5	544.2	522.2
OTHER INCOME (EXPENSE)
Gain (loss) on equity securities (Note 1)	282.1	(8.6)	0
Equity in earnings (losses) of unconsolidated affiliates	0	169.8	(668)	[1],[2]
Allowance for equity funds used during construction	6.9	6.7	4.8
Other net periodic benefit income (expense)	(12.9)	(6.1)	(3.9)
Other income	74.6	26.3	37.5
Gain (Loss) on Disposition of Assets	0	344.4	0
Other expense	(44.6)	(39.9)	(35.2)
Net other income (expense)	306.1	492.6	(664.8)
INTEREST EXPENSE
Interest on long-term debt	162.1	154.8	152.8
Allowance for borrowed funds used during construction	(4)	(3.5)	(1.9)
Interest on short-term debt and other interest charges	8.2	7	7.6
Interest expense	166.3	158.3	158.5
INCOME (LOSS) BEFORE TAXES	789.3	878.5	(301.1)
INCOME TAX EXPENSE (BENEFIT)	123.6	141.2	(127.4)
NET INCOME (LOSS)	$ 665.7	$ 737.3	$ (173.7)
BASIC AVERAGE COMMON SHARES OUTSTANDING	200.2	200.1	200.1
DILUTED AVERAGE COMMON SHARES OUTSTANDING	200.8	200.3	200.1
BASIC EARNINGS (LOSS) PER AVERAGE COMMON SHARE	$ 3.33	$ 3.68	$ (0.87)
DILUTED EARNINGS (LOSS) PER AVERAGE COMMON SHARE	3.32	3.68	(0.87)
DIVIDENDS DECLARED PER COMMON SHARE	$ 1.6482	$ 1.6250	$ 1.5800
Other Comprehensive Income (Loss), Net of Tax	$ 12.9	$ 7.3	$ (4.2)
Comprehensive income (loss)	678.6	744.6	(177.9)
Og and E [Member]
Revenues from contracts with customers	3,304.2	3,588.7	2,069.8
Other revenues	71.5	65	52.5
OPERATING REVENUES
Operating revenues	3,375.7	3,653.7	2,122.3
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE	1,662.4	2,127.6	644.6
OPERATING EXPENSES
Other operation and maintenance	491.9	464.7	464.4
Depreciation and amortization	460.9	416	391.3
Taxes other than income	98	99.3	97.2
Operating expenses	1,050.8	980	952.9
OPERATING INCOME	662.5	546.1	524.8
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	6.9	6.7	4.8
Other net periodic benefit income (expense)	1.2	(4.3)	(3.1)
Other income	6.5	7.1	5
Other expense	(3.4)	(1.8)	(2.6)
Net other income (expense)	11.2	7.7	4.1
INTEREST EXPENSE
Interest on long-term debt	157.4	152.7	152.8
Allowance for borrowed funds used during construction	(4)	(3.5)	(1.9)
Interest on short-term debt and other interest charges	4.4	2.8	3.9
Interest expense	157.8	152	154.8
INCOME (LOSS) BEFORE TAXES	515.9	401.8	374.1
INCOME TAX EXPENSE (BENEFIT)	76.4	41.8	34.7
NET INCOME (LOSS)	439.5	360	339.4
Net Income (Loss) Attributable to Parent	439.5	360	339.4
Other Comprehensive Income (Loss), Net of Tax	0	0	0
Comprehensive income (loss)	$ 439.5	$ 360	$ 339.4

[1] For the year ended December 31, 2020, Enable recorded a $ 225.0 million impairment on an equity method investment, which ran through OGE Energy's portion of Enable net income and was offset by basis differences that flow through the amortization of basis difference and dilution recognition line item above. In March 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income (loss)	$ 665.7	$ 737.3	$ (173.7)
Pension Plan and Restoration of Retirement Income Plan:
Amortization of prior service cost, net of tax of $0.1, $0.0 and $0.0, respectively	0.2	0.1	0
Amortization of deferred net loss, net of tax of $0.2, $0.9 and $1.2, respectively	1.4	1.6	3.9
Net gain (loss) arising during the period, net of tax of ($2.4), $0.0 and ($1.7), respectively	(7.6)	1.4	(5.1)
Prior service cost arising during the period, net of tax of $0.0, ($0.3) and $0.0, respectively	0	(1.1)	0
Settlement cost, net of tax of $4.3, $2.7 and $0.7, respectively	13.6	6	2.2
Postretirement benefit plans:
Amortization of prior service credit, net of tax of ($0.1), ($0.4) and ($0.6), respectively	(0.2)	(1.4)	(1.7)
Amortization of deferred net (gain) loss, net of tax of $0.0, $0.0 and $0.0, respectively	0	0.1	(0.1)
Net gain (loss) arising during the period, net of tax of $1.7, ($0.2) and ($0.8), respectively	5.5	(0.7)	(2.4)
Curtailment cost, net of tax of $0.0, $0.0 and ($0.1), respectively	0	0	(0.3)
Other comprehensive gain (loss) from unconsolidated affiliates, net of tax $0.0, $0.3 and ($0.2), respectively	0	1.3	(0.7)
Other comprehensive income (loss), net of tax	12.9	7.3	(4.2)
Comprehensive income (loss)	$ 678.6	$ 744.6	$ (177.9)

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Postretirement plans:
Other Comprehensive Income (Loss), Tax, Portion Attributable to Noncontrolling Interest	$ 0	$ 0.3	$ (0.2)
Pension Plans [Member]
Pension Plan and Restoration of Retirement Income Plan:
Amortization of prior service cost, net of tax of $0.1, $0.0 and $0.0, respectively	0.1	0	0
Amortization of deferred net loss, net of tax of $0.2, $0.9 and $1.2, respectively	0.2	0.9	1.2
Net gain (loss) arising during the period, net of tax of ($2.4), $0.0 and ($1.7), respectively	(2.4)	0	(1.7)
Prior service cost arising during the period, net of tax of $0.0, ($0.3) and $0.0, respectively	0	(0.3)	0
Settlement cost, net of tax of $4.3, $2.7 and $0.7, respectively	4.3	2.7	0.7
Other Postretirement Benefits Plan [Member]
Postretirement plans:
Amortization of prior service credit, net of tax of ($0.1), ($0.4) and ($0.6), respectively	(0.1)	(0.4)	(0.6)
Amortization of deferred net (gain) loss, net of tax of $0.0, $0.0 and $0.0, respectively	0	0	0
Net gain (loss) arising during the period, net of tax of $1.7, ($0.2) and ($0.8), respectively	1.7	(0.2)	(0.8)
Curtailment cost, net of tax of $0.0, $0.0 and ($0.1), respectively	$ 0	$ 0	$ (0.1)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 665.7	$ 737.3	$ (173.7)
Adjustments to reconcile net income (loss) to net cash provided from (used in) operating activities:
Depreciation and amortization	460.9	416	391.3
Deferred income taxes and other tax credits, net	(154)	125.9	(134.5)
(Gain) loss on investment in equity securities (Note 1)	(282.1)	8.6	0
Gain on Enable/Energy Transfer transaction (Note 1)	0	(353)	0
Equity in (earnings) losses of unconsolidated affiliates	0	(169.8)	668	[1],[2]
Distributions from unconsolidated affiliates	0	73.4	91.7
Allowance for equity funds used during construction	(6.9)	(6.7)	(4.8)
Stock-based compensation expense	9.7	9.8	9.8
Regulatory assets	702.2	(874.9)	(112)
Regulatory liabilities	(118.4)	(71.2)	(64)
Other assets	18.9	(9.8)	(9.2)
Other liabilities	(6.6)	(8.1)	(26.3)
Change in certain current assets and liabilities:
Accounts receivable and accrued unbilled revenues, net	(97)	(1.9)	3.1
Income taxes receivable	(18.1)	5.5	2.8
Fuel, materials and supplies inventories	(130.1)	(3.4)	(8.9)
Fuel recoveries	(363)	(180.5)	63.3
Other current assets	(30.2)	(22.7)	(16.8)
Accounts payable	155.4	7.5	59.8
Other current liabilities	36.7	4.7	(26.8)
Net cash provided from (used in) operating activities	843.1	(313.3)	712.8
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)	(1,050.9)	(778.5)	(650.5)
Proceeds from Sale of Equity Securities, FV-NI	1,067.2	0	0
Cash received in Enable/Energy Transfer transaction (Note 1)	0	35	0
Other	(3.4)	(5.6)	(4.4)
Net cash used in investing activities	12.9	(749.1)	(654.9)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from long-term debt	49.3	997.8	297.1
(Decrease) increase in short-term debt	(486.9)	391.9	(17)
Payment of long-term debt	(0.1)	(0.1)	(0.1)
Dividends paid on common stock	(329.3)	(324.9)	(314.9)
Cash paid for employee equity-based compensation and expense of common stock	(0.9)	(3.4)	(7.1)
Purchase of treasury stock	0	0	(14.7)
Other	0	0	(0.1)
Net cash (used in) provided from financing activities	(767.9)	1,061.3	(56.8)
NET CHANGE IN CASH AND CASH EQUIVALENTS	88.1	(1.1)	1.1
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	0	1.1	0
CASH AND CASH EQUIVALENTS AT END OF YEAR	88.1	0	1.1
SUPPLEMENTAL CASH FLOW INFORMATION
Interest (net of interest capitalized)	164	156.4	153.4
Income taxes (net of income tax refunds)	276	8.7	3.9
NON-CASH INVESTING AND FINANCING ACTIVITIES
Power plant long-term service agreement	0.8	2.4	6.8
Noncash or Part Noncash Acquisition, Investments Acquired	0	793.7	0
OG&E [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	439.5	360	339.4
Adjustments to reconcile net income (loss) to net cash provided from (used in) operating activities:
Depreciation and amortization	460.9	416	391.3
Deferred income taxes and other tax credits, net	220.5	44.6	40.9
Allowance for equity funds used during construction	(6.9)	(6.7)	(4.8)
Stock-based compensation expense	2.9	2.2	3
Regulatory assets	702.2	(874.9)	(112)
Regulatory liabilities	(118.4)	(71.2)	(64)
Other assets	0	(2.2)	(3.4)
Other liabilities	(5.6)	(11.2)	(24.3)
Change in certain current assets and liabilities:
Accounts receivable and accrued unbilled revenues, net	(96.6)	(3)	4.5
Fuel, materials and supplies inventories	(130.1)	(3.4)	(8.9)
Fuel recoveries	(363)	(180.5)	63.3
Other current assets	(30.1)	(21.4)	(17.3)
Accounts payable	135.8	(11)	64.8
Income taxes payable - parent	8	0.7	(5.3)
Other current liabilities	19.3	3.3	(26.8)
Net cash provided from (used in) operating activities	1,238.4	(358.7)	640.4
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)	(1,050.9)	(778.5)	(650.5)
Net cash used in investing activities	(1,050.9)	(778.5)	(650.5)
CASH FLOWS FROM FINANCING ACTIVITIES
Capital contribution from OGE Energy	0	530	0
Proceeds from long-term debt	0	499.8	297.1
Payment of long-term debt	(0.1)	(0.1)	(0.1)
Dividends paid on common stock	0	(265)	(325)
Changes In advances with parent	(187.4)	372.5	38.1
Net cash (used in) provided from financing activities	(187.5)	1,137.2	10.1
NET CHANGE IN CASH AND CASH EQUIVALENTS	0	0	0
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	0	0	0
CASH AND CASH EQUIVALENTS AT END OF YEAR	0	0	0
SUPPLEMENTAL CASH FLOW INFORMATION
Interest (net of interest capitalized)	154.6	148.9	150.2
Income taxes (net of income tax refunds)	(152.6)	(3.2)	(0.2)
NON-CASH INVESTING AND FINANCING ACTIVITIES
Power plant long-term service agreement	$ 0.8	$ 2.4	$ 6.8

[1] For the year ended December 31, 2020, Enable recorded a $ 225.0 million impairment on an equity method investment, which ran through OGE Energy's portion of Enable net income and was offset by basis differences that flow through the amortization of basis difference and dilution recognition line item above. In March 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest costs capitalized	$ 4	$ 3.5	$ 1.9
OG&E [Member]
Interest costs capitalized	$ 4	$ 3.5	$ 1.9

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2022	Dec. 31, 2021
CURRENT ASSETS
Cash and cash equivalents	$ 88,100,000	$ 0
Accounts receivable	250,100,000	162,300,000
Accrued unbilled revenues	74,200,000	65,000,000
Income taxes receivable	20,700,000	2,600,000
Fuel inventories	108,800,000	40,600,000
Materials and supplies, at average cost	180,500,000	117,900,000
Fuel clause under recoveries	514,900,000	151,900,000
Other	103,500,000	73,300,000
Total current assets	1,340,800,000	613,600,000
OTHER PROPERTY AND INVESTMENTS
Equity securities investment in Energy Transfer	0	785,100,000
Other	105,800,000	120,000,000
Total other property and investments	105,800,000	905,100,000
PROPERTY, PLANT AND EQUIPMENT
In service	14,695,200,000	13,899,800,000
Construction work in progress	436,100,000	252,000,000
Total property, plant and equipment	15,131,300,000	14,151,800,000
Less: accumulated depreciation	4,584,500,000	4,318,900,000
Net property, plant and equipment	10,546,800,000	9,832,900,000
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	524,300,000	1,230,800,000
Other	27,000,000	24,000,000
Total deferred charges and other assets	551,300,000	1,254,800,000
TOTAL ASSETS	12,544,700,000	12,606,400,000
CURRENT LIABILITIES
Short-term debt	0	486,900,000
Accounts payable	448,900,000	274,000,000
Dividends payable	82,900,000	82,100,000
Customer deposits	88,800,000	81,100,000
Accrued taxes	54,000,000	52,900,000
Accrued interest	41,100,000	40,800,000
Accrued compensation	37,000,000	37,700,000
Long-term debt due within one year	999,900,000	0
Other	49,600,000	34,100,000
Total current liabilities	1,802,200,000	1,089,600,000
LONG-TERM DEBT	3,548,700,000	4,496,400,000
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	176,900,000	159,800,000
Deferred income taxes	1,233,500,000	1,333,300,000
Deferred investment tax credits	12,000,000	12,800,000
Regulatory liabilities	1,147,100,000	1,231,100,000
Other	210,900,000	227,100,000
Total deferred credits and other liabilities	2,780,400,000	2,964,100,000
Total liabilities	8,131,300,000	8,550,100,000
COMMITMENTS AND CONTINGENCIES (NOTE 13)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,134,500,000	1,125,800,000
Retained earnings	3,290,900,000	2,955,400,000
Accumulated other comprehensive loss, net of tax	(11,900,000)	(24,800,000)
Treasury stock, at cost	(100,000)	(100,000)
Total stockholders' equity	4,413,400,000	4,056,300,000
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	12,544,700,000	12,606,400,000
OG&E [Member]
CURRENT ASSETS
Accounts receivable	249,400,000	162,000,000
Accrued unbilled revenues	74,200,000	65,000,000
Advances to parent	91,000,000	0
Fuel inventories	108,800,000	40,600,000
Materials and supplies, at average cost	180,500,000	117,900,000
Fuel clause under recoveries	514,900,000	151,900,000
Other	97,800,000	67,700,000
Total current assets	1,316,600,000	605,100,000
OTHER PROPERTY AND INVESTMENTS
Total other property and investments	4,400,000	3,900,000
PROPERTY, PLANT AND EQUIPMENT
In service	14,689,100,000	13,893,700,000
Construction work in progress	436,100,000	252,000,000
Total property, plant and equipment	15,125,200,000	14,145,700,000
Less: accumulated depreciation	4,584,500,000	4,318,900,000
Net property, plant and equipment	10,540,700,000	9,826,800,000
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	524,300,000	1,230,800,000
Other	24,500,000	21,400,000
Total deferred charges and other assets	548,800,000	1,252,200,000
TOTAL ASSETS	12,410,500,000	11,688,000,000
CURRENT LIABILITIES
Accounts payable	395,800,000	240,600,000
Advances from parent	0	101,300,000
Customer deposits	88,800,000	81,100,000
Accrued taxes	46,500,000	50,800,000
Accrued interest	40,800,000	40,400,000
Accrued compensation	27,800,000	27,800,000
Long-term debt due within one year	500,000,000	0
Other	49,300,000	33,800,000
Total current liabilities	1,149,000,000	575,800,000
LONG-TERM DEBT	3,498,900,000	3,996,500,000
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	98,300,000	75,100,000
Deferred income taxes	1,271,100,000	1,000,400,000
Deferred investment tax credits	12,000,000	12,800,000
Regulatory liabilities	1,147,100,000	1,231,100,000
Other	188,900,000	193,500,000
Total deferred credits and other liabilities	2,717,400,000	2,512,900,000
Total liabilities	7,365,300,000	7,085,200,000
COMMITMENTS AND CONTINGENCIES (NOTE 13)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,574,600,000	1,571,700,000
Retained earnings	3,470,600,000	3,031,100,000
Total stockholders' equity	5,045,200,000	4,602,800,000
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 12,410,500,000	$ 11,688,000,000

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Accounts receivable, allowance for credit loss	$ 1.9	$ 2.4
OG&E [Member]
Accounts receivable, allowance for credit loss	$ 1.9	$ 2.4

CONSOLIDATED STATEMENTS OF CAPI

CONSOLIDATED STATEMENTS OF CAPITALIZATION - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Schedule of Capitalization, Long-term Debt [Line Items]
Common Stock, Value	$ 2	$ 2
Premium on common stock	1,132.5	1,123.8
Retained earnings	3,290.9	2,955.4
Accumulated other comprehensive loss, net of tax	(11.9)	(24.8)
Treasury Stock, Value	(0.1)	(0.1)
Total stockholders' equity	4,413.4	4,056.3
Unamortized debt expense	(22.2)	(23.8)
Total long-term debt	4,548.6	4,496.4
Less: long-term debt due within one year	(999.9)	0
Total long-term debt (excluding long-term debt due within one year)	3,548.7	4,496.4
Total capitalization (including long-term debt due within one year)	8,962	8,552.7
Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Common Stock, Value	100.9	100.9
Premium on common stock	1,473.7	1,470.8
Retained earnings	3,470.6	3,031.1
Total stockholders' equity	5,045.2	4,602.8
Unamortized debt expense	(21.9)	(23.7)
Unamortized discount	(8.9)	(9.5)
Total long-term debt	3,998.9	3,996.5
Less: long-term debt due within one year	(500)	0
Total long-term debt (excluding long-term debt due within one year)	3,498.9	3,996.5
Total capitalization (including long-term debt due within one year)	9,044.1	8,599.3
Senior Notes [Member] \| Series Due May 26, 2023 [Member] \| OGE Energy [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	500	500
Senior Notes [Member] \| Series Due May 26, 2023 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	500	500
Senior Notes [Member] \| Series Due July 15, 2027 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	125	125
Senior Notes [Member] \| Series Due April 15, 2028 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	100	100
Senior Notes [Member] \| Series Due August 15, 2028 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	400	400
Senior Notes [Member] \| Series Due March 15, 2030 \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	300	300
Senior Notes [Member] \| Series Due April 1, 2030 \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	300	300
Senior Notes [Member] \| Series Due January 15, 2036 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	110	110
Senior Notes [Member] \| Series Due February 1, 2038 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	200	200
Senior Notes [Member] \| Series Due June 1, 2040 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	250	250
Senior Notes [Member] \| Series Due May 15, 2041 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	250	250
Senior Notes [Member] \| Series Due May 1, 2043 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	250	250
Senior Notes [Member] \| Series Due March 15, 2044 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	250	250
Senior Notes [Member] \| Series Due December 15, 2044 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	250	250
Senior Notes [Member] \| Series due April 1, 2047 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	300	300
Senior Notes [Member] \| Series due August 15, 2047 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	300	300
Term Loan [Member] \| Due May 24, 2025 \| OGE Energy [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	50	0
Long-term Debt [Member] \| Due August 31, 2062 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	9.3	9.3
Debentures Subject to Mandatory Redemption [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Total long-term debt	135.4
Debentures Subject to Mandatory Redemption [Member] \| Garfield Industrial Authority Bond [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	47	47
Debentures Subject to Mandatory Redemption [Member] \| Muskogee Industrial Authority Bond Due 2025 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	32.4	32.4
Debentures Subject to Mandatory Redemption [Member] \| Muskogee Industrial Authority Bond Due 2027 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term Debt, Gross	$ 56	$ 56

CONSOLIDATED STATEMENTS OF CA_3

CONSOLIDATED STATEMENTS OF CAPITALIZATION (Parenthetical) - $ / shares shares in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Schedule of Capitalization, Long-term Debt [Line Items]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	450	450
Common Stock, Shares, Outstanding	200.2	200.1
Treasury Stock, Common, Shares	0	0
Debt Instrument, Maturity Date	Dec. 31, 2027
Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Common Stock, Par or Stated Value Per Share	$ 2.50	$ 2.50
Common Stock, Shares Authorized	100	100
Common Stock, Shares, Outstanding	40.4	40.4
Garfield Industrial Authority Bond [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Maturity Date	Jan. 01, 2025
Garfield Industrial Authority Bond [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Maturity Date	Jan. 01, 2025
Muskogee Industrial Authority Bond Due 2025 [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Maturity Date	Jan. 01, 2025
Muskogee Industrial Authority Bond Due 2025 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Maturity Date	Jan. 01, 2025
Muskogee Industrial Authority Bond Due 2027 [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Maturity Date	Jun. 01, 2027
Muskogee Industrial Authority Bond Due 2027 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Maturity Date	Jun. 01, 2027
Senior Notes [Member] \| Series Due May 26, 2023 [Member] \| OGE Energy [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.703%
Debt Instrument, Maturity Date	May 26, 2023
Senior Notes [Member] \| Series Due May 26, 2023 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.553%
Debt Instrument, Maturity Date	May 26, 2023
Senior Notes [Member] \| Series Due July 15, 2027 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.65%
Debt Instrument, Maturity Date	Jul. 15, 2027
Senior Notes [Member] \| Series Due April 15, 2028 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.50%
Debt Instrument, Maturity Date	Apr. 15, 2028
Senior Notes [Member] \| Series due August 15, 2028 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.80%
Debt Instrument, Maturity Date	Aug. 15, 2028
Senior Notes [Member] \| Series Due March 15, 2030 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.30%
Debt Instrument, Maturity Date	Mar. 15, 2030
Senior Notes [Member] \| Series Due April 1, 2030 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.25%
Debt Instrument, Maturity Date	Apr. 01, 2030
Senior Notes [Member] \| Series Due January 15, 2036 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.75%
Debt Instrument, Maturity Date	Jan. 15, 2036
Senior Notes [Member] \| Series Due February 1, 2038 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.45%
Debt Instrument, Maturity Date	Feb. 01, 2038
Senior Notes [Member] \| Series Due June 1, 2040 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.85%
Debt Instrument, Maturity Date	Jun. 01, 2040
Senior Notes [Member] \| Series Due May 15, 2041 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.25%
Debt Instrument, Maturity Date	May 15, 2041
Senior Notes [Member] \| Series due May 1, 2043 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.90%
Debt Instrument, Maturity Date	May 01, 2043
Senior Notes [Member] \| Series due March 15, 2044 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.55%
Debt Instrument, Maturity Date	Mar. 15, 2044
Senior Notes [Member] \| Series due December 15, 2044 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4%
Debt Instrument, Maturity Date	Dec. 15, 2044
Senior Notes [Member] \| Series due April 1, 2047 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.15%
Debt Instrument, Maturity Date	Apr. 01, 2047
Senior Notes [Member] \| Series due August 15, 2047 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.85%
Debt Instrument, Maturity Date	Aug. 15, 2047
Term Loan [Member] \| Due May 24, 2025 \| OGE Energy [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Maturity Date	May 24, 2025
Term Loan [Member] \| Due May 24, 2025 \| OGE Energy [Member] \| Minimum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.875%
Term Loan [Member] \| Due May 24, 2025 \| OGE Energy [Member] \| Maximum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.375%
Long-term Debt [Member] \| Due August 31, 2062 [Member] \| Og and E [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.80%
Debt Instrument, Maturity Date	Aug. 31, 2062
Debentures Subject to Mandatory Redemption [Member] \| Garfield Industrial Authority Bond [Member] \| Minimum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.11%
Debentures Subject to Mandatory Redemption [Member] \| Garfield Industrial Authority Bond [Member] \| Maximum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.98%
Debentures Subject to Mandatory Redemption [Member] \| Garfield Industrial Authority Bond [Member] \| Og and E [Member] \| Minimum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.11%
Debentures Subject to Mandatory Redemption [Member] \| Garfield Industrial Authority Bond [Member] \| Og and E [Member] \| Maximum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.98%
Debentures Subject to Mandatory Redemption [Member] \| Muskogee Industrial Authority Bond Due 2025 [Member] \| Minimum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.11%
Debentures Subject to Mandatory Redemption [Member] \| Muskogee Industrial Authority Bond Due 2025 [Member] \| Maximum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.95%
Debentures Subject to Mandatory Redemption [Member] \| Muskogee Industrial Authority Bond Due 2025 [Member] \| Og and E [Member] \| Minimum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.11%
Debentures Subject to Mandatory Redemption [Member] \| Muskogee Industrial Authority Bond Due 2025 [Member] \| Og and E [Member] \| Maximum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.95%
Debentures Subject to Mandatory Redemption [Member] \| Muskogee Industrial Authority Bond Due 2027 [Member] \| Minimum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.11%
Debentures Subject to Mandatory Redemption [Member] \| Muskogee Industrial Authority Bond Due 2027 [Member] \| Maximum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.98%
Debentures Subject to Mandatory Redemption [Member] \| Muskogee Industrial Authority Bond Due 2027 [Member] \| Og and E [Member] \| Minimum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.11%
Debentures Subject to Mandatory Redemption [Member] \| Muskogee Industrial Authority Bond Due 2027 [Member] \| Og and E [Member] \| Maximum [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.98%

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	OG&E [Member]	Common Stock	Common Stock OG&E [Member]	Premium on Common Stock	Premium on Common Stock OG&E [Member]	Retained Earnings	Retained Earnings OG&E [Member]	Accumulated Other Comprehensive Income (Loss)	Treasury Stock [Member]
Balance at Dec. 31, 2019	$ 4,139.5	$ 3,958.3	$ 2	$ 100.9	$ 1,129.3	$ 935.7	$ 3,036.1	$ 2,921.7	$ (27.9)	$ 0
Common Stock, Shares, Outstanding at Dec. 31, 2019			200,100,000	40,400,000
Treasury Stock, Common, Shares at Dec. 31, 2019										0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(173.7)	339.4	$ 0	$ 0	0	0	(173.7)	339.4	0	$ 0
Net income (loss), Number of Shares			0	0						0
Other comprehensive income (loss), net of tax, Number of Shares			0							0
Other comprehensive income (loss), net of tax	(4.2)	0	$ 0		0		0		(4.2)	$ 0
Dividends declared on common stock, Number of Shares			0	0						0
Dividends declared on common stock	(317.8)	(325)	$ 0	$ 0	0	0	(317.8)	(325)	0	$ 0
Purchase of treasury stock, Value	$ (14.7)		$ 0		0		0		0	$ (14.7)
Purchase of treasury stock, Number of Shares	405,000		0							400,000
Stock-based compensation, Number of Shares			0							(300,000)
Stock-based compensation	$ 2.7	2.9	$ 0	0	(6.7)	2.9	0	0	0	$ 9.4
Balance at Dec. 31, 2020	3,631.8	3,975.6	$ 2	$ 100.9	1,122.6	938.6	2,544.6	2,936.1	(32.1)	$ (5.3)
Common Stock, Shares, Outstanding at Dec. 31, 2020			200,100,000	40,400,000
Treasury Stock, Common, Shares at Dec. 31, 2020										100,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	737.3	360	$ 0	$ 0	0	0	737.3	360	0	$ 0
Net income (loss), Number of Shares			0	0						0
Other comprehensive income (loss), net of tax, Number of Shares			0							0
Other comprehensive income (loss), net of tax	7.3	0	$ 0		0		0		7.3	$ 0
Dividends declared on common stock, Number of Shares			0	0						0
Dividends declared on common stock	(326.5)	(265)	$ 0	$ 0	0	0	(326.5)	(265)	0	$ 0
Capital contribution from OGE Energy		530		$ 0		530		0
Capital contribution from OGE Energy, Number of Shares				0
Stock-based compensation, Number of Shares			0	0						(100,000)
Stock-based compensation	6.4	2.2	$ 0	$ 0	1.2	2.2	0	0	0	$ 5.2
Balance at Dec. 31, 2021	$ 4,056.3	$ 4,602.8	$ 2	$ 100.9	1,123.8	1,470.8	2,955.4	3,031.1	(24.8)	$ (0.1)
Common Stock, Shares, Outstanding at Dec. 31, 2021	200,100,000	40,400,000	200,100,000	40,400,000
Treasury Stock, Common, Shares at Dec. 31, 2021	0									0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 665.7	$ 439.5	$ 0	$ 0	0	0	665.7	439.5	0	$ 0
Net income (loss), Number of Shares			0	0						0
Other comprehensive income (loss), net of tax, Number of Shares			0							0
Other comprehensive income (loss), net of tax	12.9	0	$ 0		0		0		12.9	$ 0
Dividends declared on common stock, Number of Shares			0							0
Dividends declared on common stock	(330.2)		$ 0		0		(330.2)		0	$ 0
Stock-based compensation, Number of Shares			100,000	0						0
Stock-based compensation	8.7	2.9	$ 0	$ 0	8.7	2.9	0	0	0	$ 0
Balance at Dec. 31, 2022	$ 4,413.4	$ 5,045.2	$ 2	$ 100.9	$ 1,132.5	$ 1,473.7	$ 3,290.9	$ 3,470.6	$ (11.9)	$ (0.1)
Common Stock, Shares, Outstanding at Dec. 31, 2022	200,200,000	40,400,000	200,200,000	40,400,000
Treasury Stock, Common, Shares at Dec. 31, 2022	0									0

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Common Stock, Dividends, Per Share, Declared	$ 1.6482	$ 1.6250	$ 1.5800

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
Summary of Significant Accounting Policies	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	1. Summary of Significant Accounting Policies Organization OGE Energy is a holding company with investments in energy and energy services providers offering physical delivery and related services for electricity in Oklahoma and western Arkansas. Prior to September 30, 2022, OGE Energy also held investments in Enable and Energy Transfer, which offered natural gas, crude oil and NGL services. OGE Energy reports these activities through two business segments: (i) electric company and (ii) natural gas midstream operations. The accounts of OGE Energy and its wholly-owned subsidiaries, including OG&E, are included in OGE Energy's consolidated financial statements. All intercompany transactions and balances are eliminated in such consolidation. For periods prior to the December 2, 2021 closing of the Enable and Energy Transfer merger, OGE Energy accounted for its investment in Enable as an equity method investment and reported it within OGE Energy's natural gas midstream operations segment. For the period of December 2, 2021 through September 30, 2022, OGE Energy accounted for its investment in the Energy Transfer units it acquired in the merger as an investment in equity securities, as further discussed below. As of the end of September 2022, OGE Energy had sold all of its Energy Transfer limited partner units, becoming primarily an electric company. Electric Company Operations . OGE Energy's electric company operations are conducted through OG&E, which generates, transmits, distributes and sells electric energy in Oklahoma and western Arkansas. OG&E's rates are subject to regulation by the OCC, the APSC and the FERC. OG&E was incorporated in 1902 under the laws of the Oklahoma Territory and is a wholly-owned subsidiary of OGE Energy. OG&E is the largest electric company in Oklahoma, and its franchised service territory includes Fort Smith, Arkansas and the surrounding communities. OG&E sold its retail natural gas business in 1928 and is no longer engaged in the natural gas distribution business. Natural Gas Midstream Operations. For the period of December 2, 2021 to September 30, 2022, OGE Energy's natural gas midstream operations segment included OGE Energy's investment in Energy Transfer's equity securities acquired in the Enable/Energy Transfer merger. For the year ended December 31, 2022, this segment also includes legacy Enable seconded employee pension and postretirement costs. Prior to OGE Energy's sale of all Energy Transfer limited partner units, the investment in Energy Transfer's equity securities was held through wholly-owned subsidiaries and ultimately OGE Holdings. OGE Energy accounted for its investment in Energy Transfer as an investment in equity securities, as further discussed under "Investment in Equity Securities of Energy Transfer" below. Accounting Records The accounting records of OG&E are maintained in accordance with the Uniform System of Accounts prescribed by the FERC and adopted by the OCC and the APSC. Additionally, OG&E, as a regulated utility, is subject to accounting principles for certain types of rate-regulated activities, which provide that certain incurred costs that would otherwise be charged to expense can be deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense can be deferred as regulatory liabilities, based on the expected flowback to customers in future rates. Management's expected recovery of deferred costs and flowback of deferred credits generally results from specific decisions by regulators granting such ratemaking treatment. OG&E records certain incurred costs and obligations as regulatory assets or liabilities if, based on regulatory orders or other available evidence, it is probable that the costs or obligations will be included in amounts allowable for recovery or refund in future rates. The following table presents a summary of OG&E's regulatory assets and liabilities. December 31 (In millions) 2022 2021 REGULATORY ASSETS Current: Oklahoma fuel clause under recoveries $ 474.3 $ 140.4 Arkansas fuel clause under recoveries 40.6 11.5 Oklahoma Energy Efficiency Rider under recoveries (A) 7.7 11.7 Other (A) 4.7 19.0 Total current regulatory assets $ 527.3 $ 182.6 Non-current: Oklahoma deferred storm expenses $ 206.3 $ 172.8 Benefit obligations regulatory asset 119.7 109.2 Arkansas Winter Storm Uri costs 78.2 88.9 Pension tracker 57.2 42.9 Sooner Dry Scrubbers 18.1 18.9 Arkansas deferred pension expenses 12.3 12.1 Unamortized loss on reacquired debt 8.0 8.9 COVID-19 impacts 7.7 8.2 Frontier Plant deferred expenses 5.2 6.7 Oklahoma Winter Storm Uri costs — 747.9 Other 11.6 14.3 Total non-current regulatory assets $ 524.3 $ 1,230.8 REGULATORY LIABILITIES Current: SPP cost tracker over recovery (B) $ 3.0 $ — Other (B) 2.5 2.5 Total current regulatory liabilities $ 5.5 $ 2.5 Non-current: Income taxes refundable to customers, net $ 894.7 $ 930.7 Accrued removal obligations, net 250.5 296.8 Other 1.9 3.6 Total non-current regulatory liabilities $ 1,147.1 $ 1,231.1 (A) Included in Other Current Assets in the balance sheets. (B) Included in Other Current Liabilities in the balance sheets. Fuel clause under and over recoveries are generated from OG&E's customers when OG&E's cost of fuel either exceeds or is less than the amount billed to its customers, respectively. OG&E's fuel recovery clauses are designed to smooth the impact of fuel price volatility on customers' bills. As a result, OG&E under recovers fuel costs in periods of rising fuel prices above the baseline charge for fuel and over recovers fuel costs when prices decline below the baseline charge for fuel. Provisions in the fuel clauses are intended to allow OG&E to amortize under and over recovery balances. OG&E recovers program costs related to the Energy Efficiency Program in Oklahoma through the Energy Efficiency Rider, which operates on a three-year program cycle. The current program cycle, which runs through 2024, includes recovery of (i) energy efficiency program costs, (ii) lost revenues associated with certain achieved energy efficiency and demand savings, (iii) performance-based incentives and (iv) costs associated with research and development investments. OG&E includes in expense any Oklahoma storm-related operation and maintenance expenses up to $ 2.7 million annually and defers to a regulatory asset any additional expenses incurred over $ 2.7 million. OG&E typically recovers the amounts deferred each year over a five to ten year period in accordance with historical practice. The benefit obligations regulatory asset is comprised of expenses recorded which are probable of future recovery and that have not yet been recognized as components of net periodic benefit cost, including net loss and prior service cost. These expenses are recorded as a regulatory asset as OG&E historically has recovered and currently recovers pension and postretirement benefit plan expense in its electric rates. If, in the future, the regulatory bodies indicate a change in policy related to the recovery of pension and postretirement benefit plan expenses, this could cause the benefit obligations regulatory asset balance to be reclassified to accumulated other comprehensive income. The following table presents a summary of the components of the benefit obligations regulatory asset. December 31 (In millions) 2022 2021 Pension Plan and Restoration of Retirement Income Plan: Net loss $ 110.0 $ 89.6 Postretirement Benefit Plans: Net loss 9.7 23.2 Prior service cost — ( 3.6 ) Total $ 119.7 $ 109.2 In February 2021, Winter Storm Uri resulted in record winter peak demand for electricity and extremely high natural gas and purchased power prices in OG&E's service territory. The OCC allowed OG&E to create a regulatory asset for the Oklahoma portion of all deferred costs, and the Oklahoma Winter Storm Uri regulatory asset was fully recovered in July 2022 through OG&E's receipt of securitization funds from the ODFA, as further discussed in Note 14. In 2021, the APSC allowed OG&E to create a regulatory asset for the Arkansas portion of all deferred costs and, as ordered in January 2023, to amortize the regulatory asset balance over 10 years using a weighted average cost of capital as a carrying charge, as further discussed in Note 14. OG&E recovers specific amounts of pension and postretirement medical costs in rates approved in its Oklahoma rate reviews. In accordance with approved orders, OG&E defers the difference between actual pension and postretirement medical expenses and the amount approved in its last Oklahoma rate review as a regulatory asset or regulatory liability. These amounts have been recorded in the Pension tracker regulatory asset in the table above. As discussed in Note 14, the OCC recently approved recovery of the over/under-recovery balance of the Pension tracker over 15 years, which is a change from the previous five-year recovery period. As approved by the OCC, OG&E deferred the non-fuel incremental operation and maintenance expenses, depreciation, debt cost associated with the capital investment and related ad valorem taxes for the Dry Scrubbers at Sooner Units 1 and 2 as a regulatory asset, and these costs are being recovered over 25 years. Arkansas includes a certain level of pension expense in base rates. When the Pension Plan experiences a settlement, which represents an acceleration of future pension costs, OG&E defers to a regulatory asset the Arkansas jurisdictional portion of each settlement, which historically has been recovered from customers over the average life of the remaining plan participants. A portion of these settlements is being recovered in current rates, and recovery of additional amounts will be requested as additional settlements occur. For additional information related to settlements, see Note 11. Unamortized loss on reacquired debt is comprised of unamortized debt issuance costs related to the early retirement of OG&E's long-term debt. These amounts are recorded in interest expense and are being amortized over the term of the long-term debt which replaced the previous long-term debt. The unamortized loss on reacquired debt is recovered as a part of OG&E's cost of capital. In response to the COVID-19 pandemic, the OCC and APSC issued orders allowing OG&E to defer certain expenses related to its COVID-19 response, such as incremental expenses that were related to the suspension of or delay in disconnection of service and additional expenses associated with ensuring the continuity of electric utility service. As discussed in Note 14, the OCC approved recovery of these costs over five years in OG&E's most recent Oklahoma general rate review. OG&E deferred to a regulatory asset the Oklahoma jurisdictional portion of costs, including non-fuel operation and maintenance expenses, depreciation, taxes other than income taxes and a return on capital, for its investment in the Frontier plant. The OCC approved recovery of these costs within base rates through the Oklahoma general rate review order received in September 2022. OG&E recovers certain SPP costs related to base plan charges from its customers and refunds certain SPP revenues received to its customers in Oklahoma through the SPP cost tracker and in Arkansas through the transmission cost recovery rider. Income taxes refundable to customers, net, primarily represents the reduction in accumulated deferred income taxes that resulted from the reduction in the federal income tax rate as part of the Tax Cuts and Jobs Act of 2017 as well as other state tax rate changes, partially offset by income taxes recoverable from customers primarily related to the equity component of the allowance for funds used during construction. These net liabilities will be returned to customers in varying amounts over approximately 80 years, and the assets will be amortized over the estimated remaining life of the assets to which they relate, as the temporary differences that generated the income tax benefits turn-around. Accrued removal obligations, net represents asset retirement costs previously recovered from ratepayers for other than legal obligations. Management continuously monitors the future recoverability of regulatory assets. When in management's judgment future recovery becomes impaired, the amount of the regulatory asset is adjusted, as appropriate. If OG&E were required to discontinue the application of accounting principles for certain types of rate-regulated activities for some or all of its operations, it could result in writing off the related regulatory assets or liabilities, which could have significant financial effects. Use of Estimates In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Changes to these assumptions and estimates could have a material effect on the Registrants' financial statements. However, the Registrants believe they have taken reasonable positions where assumptions and estimates are used in order to minimize the negative financial impact to the Registrants that could result if actual results vary from the assumptions and estimates. In management's opinion, the areas where the most significant judgment is exercised include the determination of pension and postretirement plan assumptions, income taxes, contingency reserves, asset retirement obligations, regulatory assets and liabilities, unbilled revenues and the allowance for uncollectible accounts receivable. Cash and Cash Equivalents For purposes of the financial statements, the Registrants consider all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. These investments are carried at cost, which approximates fair value. Allowance for Uncollectible Accounts Receivable Customer balances are generally written off if not collected within six months after the final billing date. The allowance for uncollectible accounts receivable for OG&E is generally calculated by multiplying the last six months of electric revenue by the provision rate, which is based on a 12-month historical average of actual balances written off and is adjusted for current conditions and supportable forecasts as necessary. To the extent the historical collection rates, when incorporating forecasted conditions, are not representative of future collections, there could be an effect on the amount of uncollectible expense recognized. Also, a portion of the uncollectible provision related to fuel within the Oklahoma jurisdiction is being recovered through the fuel adjustment clause. The allowance for uncollectible accounts receivable is a reduction to Accounts Receivable in the balance sheets and is included in Other Operation and Maintenance Expense in the statements of income. The allowance for uncollectible accounts receivable was $ 1.9 million and $ 2.4 million at December 31, 2022 and 2021, respectively. New business customers are required to provide a security deposit in the form of cash, bond or irrevocable letter of credit that is refunded when the account is closed. New residential customers whose outside credit scores indicate an elevated risk are required to provide a security deposit that is refunded based on customer protection rules defined by the OCC and the APSC. The payment behavior of all existing customers is continuously monitored, and, if the payment behavior indicates sufficient risk within the meaning of the applicable utility regulation, customers will be required to provide a security deposit. Fuel Inventories Fuel inventories for the generation of electricity consist of coal, natural gas, oil and alternative fuel. OG&E uses the weighted-average cost method of accounting for inventory that is physically added to or withdrawn from storage or stockpiles. The amount of fuel inventory was $ 108.8 million and $ 40.6 million at December 31, 2022 and 2021 , respectively. Property, Plant and Equipment All property, plant and equipment is recorded at cost. Newly constructed plant is added to plant balances at cost which includes contracted services, direct labor, materials, overhead, transportation costs and the allowance for funds used during construction. Replacements of units of property are capitalized as plant. For assets that belong to a common plant account, the replaced plant is removed from plant balances, and the cost of such property net of any salvage proceeds is charged to Accumulated Depreciation. For assets that do not belong to a common plant account, the replaced plant is removed from plant balances with the related accumulated depreciation, and the remaining balance net of any salvage proceeds is recorded as a loss in the statements of income as Other Expense. Repair and replacement of minor items of property are included in the statements of income as Other Operation and Maintenance Expense. The following tables present OG&E's ownership interest in the jointly-owned McClain Plant and the jointly-owned Redbud Plant, and, as disclosed below, only OG&E's ownership interest is reflected in the property, plant and equipment and accumulated depreciation balances in these tables. The owners of the remaining interests in the McClain Plant and the Redbud Plant are responsible for providing their own financing of capital expenditures. Also, only OG&E's proportionate interests of any direct expenses of the McClain Plant and the Redbud Plant, such as fuel, maintenance expense and other operating expenses, are included in the applicable financial statement captions in the statements of income. December 31, 2022 (In millions) Percentage Ownership Total Property, Plant and Equipment Accumulated Depreciation Net Property, Plant and Equipment McClain Plant (A) 77 % $ 261.9 $ 119.4 $ 142.5 Redbud Plant (A)(B) 51 % $ 542.1 $ 225.2 $ 316.9 (A) Construction work in progress was $ 0.7 million and $ 1.5 million for the McClain and Redbud Plants, respectively. (B) This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 78.2 million. December 31, 2021 (In millions) Percentage Ownership Total Property, Plant and Equipment Accumulated Depreciation Net Property, Plant and Equipment McClain Plant (A) 77 % $ 258.5 $ 109.0 $ 149.5 Redbud Plant (A)(B) 51 % $ 538.2 $ 203.4 $ 334.8 (A) Construction work in progress was $ 0.2 million and $0.2 million for the McClain and Redbud Plants, respectively. (B) This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 72.8 million. The following tables present the Registrants' major classes of property, plant and equipment and related accumulated depreciation. December 31, 2022 (In millions) Total Property, Plant and Equipment Accumulated Depreciation Net Property, Plant and Equipment OG&E: Distribution assets $ 5,781.3 $ 1,527.1 $ 4,254.2 Electric generation assets (A) 5,188.1 1,982.7 3,205.4 Transmission assets (B) 3,180.5 667.9 2,512.6 Intangible plant 384.0 193.6 190.4 Other property and equipment 591.3 213.2 378.1 OG&E property, plant and equipment 15,125.2 4,584.5 10,540.7 Non-OG&E property, plant and equipment 6.1 — 6.1 Total OGE Energy property, plant and equipment $ 15,131.3 $ 4,584.5 $ 10,546.8 (A) This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 78.3 million. (B) This amount includes a plant acquisition adjustment of $ 3.3 million and accumulated amortization of $ 1.0 million. Depreciation and Amortization The provision for depreciation, which was 2.7 percent and 2.6 percent of the average depreciable utility plant for 2022 and 2021, respectively, is calculated using the straight-line method over the estimated service life of the utility assets. Depreciation is provided at the unit level for production plant and at the account or sub-account level for all other plant and is based on the average life group method. In 2023 , the provision for depreciation is projected to be 2.7 percent of the average depreciable utility plant. Amortization of intangible assets is calculated using the straight-line method. Of the remaining amortizable intangible plant balance at December 31, 2022 , 43.1 percent will be amortized over 6.7 years, 56.3 percent will be amortized over 13.8 years and the remaining 0.6 percent will be amortized over 22.4 years. Amortization of plant acquisition adjustments is provided on a straight-line basis over the estimated remaining service life of the acquired assets. Plant acquisition adjustments include $ 148.3 million for the Redbud Plant, which is being amortized over a 27 - year life, and $ 3.3 million for certain transmission substation facilities in OG&E's service territory, which is being amortized over a 37 to 59 -year period. Asset Retirement Obligations OG&E has asset retirement obligations primarily associated with the removal of company-owned wind turbines on leased land, as well as the removal of asbestos from certain power generating stations. OG&E has recorded asset retirement obligations that are being accreted over their respective lives ranging from five to 68 years . Asset retirement obligations are included in Other Deferred Credits in the Registrants' balance sheets. The following table presents changes to OG&E's asset retirement obligations during the years ended December 31, 2022 and 2021. (In millions) 2022 2021 Balance at January 1 $ 80.2 $ 79.6 Accretion expense 0.6 0.6 Liabilities settled ( 2.5 ) — Balance at December 31 $ 78.3 $ 80.2 Accruals for environmental costs are recognized when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated. Costs are charged to expense or deferred as a regulatory asset based on expected recovery from customers in future rates, if they relate to the remediation of conditions caused by past operations or if they are not expected to mitigate or prevent contamination from future operations. Where environmental expenditures relate to facilities currently in use, such as pollution control equipment, the costs may be capitalized and depreciated over the future service periods. Estimated remediation costs are recorded at undiscounted amounts, independent of any insurance or rate recovery, based on prior experience, assessments and current technology. Accrued obligations are regularly adjusted as environmental assessments and estimates are revised and remediation efforts proceed. For sites where OG&E has been designated as one of several potentially responsible parties, the amount accrued represents OG&E's estimated share of the cost. OG&E had $ 24.2 million and $ 25.8 million in accrued environmental liabilities at December 31, 2022 and 2021 , respectively, which are included in OG&E's asset retirement obligation s. Allowance for Funds Used During Construction Allowance for funds used during construction, a non-cash item, is reflected as an increase to Net Other Income and a reduction to Interest Expense in the statements of income and as an increase to Construction Work in Progress in the balance sheets. Allowance for funds used during construction is calculated according to the FERC requirements for the imputed cost of equity and borrowed funds. Allowance for funds used during construction rates, compounded semi-annually, were 4.8 percent, 7.4 percent and 7.3 percent for the years ended December 31, 2022, 2021 and 2020 , respectively. Collection of Sales Tax In the normal course of its operations, OG&E collects sales tax from its customers. OG&E records a current liability for sales taxes when it bills its customers and eliminates this liability when the taxes are remitted to the appropriate governmental authorities. OG&E excludes the sales tax collected from its operating revenues. Revenue Recognition General OG&E recognizes revenue from electric sales when power is delivered to customers. The performance obligation to deliver electricity is generally created and satisfied simultaneously, and the provisions of the regulatory-approved tariff determine the charges OG&E may bill the customer, payment due date and other pertinent rights and obligations of both parties. OG&E measures its customers' metered usage and sends bills to its customers throughout each month. As a result, there is a significant amount of customers' electricity consumption that has not been billed at the end of each month. OG&E accrues an estimate of the revenues for electric sales delivered since the latest billings. Unbilled revenue is presented in Accrued Unbilled Revenues in the balance sheets and in Revenues from Contracts with Customers in the statements of income based on estimates of usage and prices during the period. The estimates that management uses in this calculation could vary from the actual amounts to be paid by customers. Integrated Market and Transmission OG&E currently owns and operates transmission and generation facilities as part of a vertically integrated utility. OG&E is a member of the SPP regional transmission organization and has transferred operational authority, but not ownership, of OG&E's transmission facilities to the SPP. The SPP has implemented FERC-approved regional day-ahead and real-time markets for energy and operating services, as well as associated transmission congestion rights. Collectively, the three markets operate together under the global name, SPP Integrated Marketplace. OG&E represents owned and contracted generation assets and customer load in the SPP Integrated Marketplace for the sole benefit of its customers. OG&E has not participated in the SPP Integrated Marketplace for any speculative trading activities. OG&E records the SPP Integrated Marketplace transactions as sales or purchases per FERC Order 668, which requires that purchases and sales be recorded on a net basis for each settlement period of the SPP Integrated Marketplace. Purchases and sales are based on the fixed transaction price determined by the market at the time of the purchase or sale and the MWh quantity purchased or sold. These results are reported as Revenues from Contracts with Customers or Fuel, Purchased Power and Direct Transmission Expense in the statements of income. OG&E's revenues, expenses, assets and liabilities may be adversely affected by changes in the organization, operating and regulation by the FERC or the SPP. OG&E's transmission revenues are generated by the use of OG&E's transmission network by the SPP, which operates the network, on behalf of other transmission owners. OG&E recognizes revenue on the sale of transmission service to its customers over time as the service is provided in the amount OG&E has a right to invoice. Transmission service to the SPP is billed monthly based on a fixed transaction price determined by OG&E's FERC-approved formula transmission rates along with other SPP-specific charges and the megawatt quantity reserved. Other Revenues Other Revenues in the statements of income is comprised of certain rider revenue that includes alternative revenue measures as defined in ASC 980, "Regulated Operations," which details two types of alternative revenue programs. The first type adjusts billings for the effects of weather abnormalities or broad external factors or to compensate OG&E for demand-side management initiatives (i.e., no-growth plans and similar conservation efforts). The second type provides for additional billings (i.e., incentive awards) for the achievement of certain objectives, such as reducing costs, reaching specified milestones or demonstratively improving customer service. Once the specific events permitting billing of the additional revenues under either program type have been completed, OG&E recognizes the additional revenues if (i) the program is established by an order from OG&E's regulatory commission that allows for automatic adjustment of future rates; (ii) the amount of additional revenues for the period is objectively determinable and is probable of recovery; and (iii) the additional revenues will be collected within 24 months following the end of the annual period in which they are recognized. Fuel Adjustment Clauses The actual cost of fuel used in electric generation and certain purchased power costs are generally recoverable from OG&E's customers through fuel adjustment clauses. The fuel adjustment clauses are subject to periodic review by the OCC and the APSC. Leases The Registrants evaluate all contracts under ASC 842 to determine if the contract is or contains a lease and to determine classification as an operating or finance lease. If a lease is identified, the Registrants recognize a right-of-use asset and a lease liability in their balance sheets. The Registrants recognize and measure a lease liability when they conclude the contract contains an identified asset that the Registrants control through having the right to obtain substantially all of the economic benefits and the right to direct the use of the identified asset. The liability is equal to the present value of lease payments, and the asset is based on the liability, subject to adjustment, such as for initial direct costs. Further, the Registrants utilize an incremental borrowing rate for purposes of measuring lease liabilities, if the discount rate is not implicit in the lease. To calculate the incremental borrowing rate, the Registrants start with a current pricing report for their senior unsecured notes, which indicates rates for periods reflective of the lease term, and adjust for the effects of collateral to arrive at the secured incremental borrowing rate. As permitted by ASC 842, the Registrants made an accounting policy election to not apply the balance sheet recognition requirements to short-term leases and to not separate lease components from non-lease components when recognizing and measuring lease liabilities. For income statement purposes, the Registrants record operating lease expense on a straight-line basis. Income Taxes OGE Energy files consolidated income tax returns in the U.S. federal jurisdiction and various state jurisdictions. OG&E is a part of the consolidated tax return of OGE Energy. Income taxes are generally allocated to each company in the affiliated group, including OG&E, based on its stand-alone taxable income or loss. Federal investment tax credits previously claimed on electric company property have been deferred and will be amortized to income over the life of the related property. The Registrants use the asset and liability method of accounting for income taxes. Under this method, a deferred tax asset or liability is recognized for the estimated future tax effects attributable to temporary differences between the financial statement basis and the tax basis of assets and liabilities as well as tax credit carry forwards and net operating loss carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period of the change. The Registrants recog nize interest related to unrecognized tax benefits in Interest Expense and recognize penalties in Other Expense in the statements of income. Deferred tax assets are evaluated for future realization and reduced by a valuation allowance to the extent the Registrants believe they will not be realized. Accrued Vacation The Registrants accrue vacation pay monthly by establishing a liability for vacation earned. Vacation may be taken as earned and is charged against the liability. At the end of each year, the liability represents the amount of vacation earned but not taken. Related Party Transactions OGE Energy charges operating costs to OG&E based on several factors, and operating costs directly related to OG&E are assigned as such. Operating costs incurred for the benefit of OG&E are allocated either as overhead based primarily on labor costs or using the "Distrigas" method, which is a three-factor formula that uses an equal weighting of payroll, net operating revenues and gross property, plant and equipment. OGE Energy adopted this method as a result of a recommendation by the OCC Staff. OGE Energy believes this method provides a reasonable basis for allocating common expense

Accounting Pronouncements

Accounting Pronouncements	12 Months Ended
Accounting Pronouncements	Dec. 31, 2022
Accounting Pronouncement [Abstract]
Accounting Pronouncements	2. Accounting Pronouncements In November 2021, the Financial Accounting Standards Board issued ASU 2021-10, "Government Assistance (Topic 832) Disclosures by Business Entities about Government Assistance." This standard requires additional annual disclosures when a business receives government assistance and uses a grant or contribution accounting model by analogy to other accounting guidance such as the grant model under International Accounting Standards 20, "Accounting for Government Grants and Disclosures of Government Assistance" and GAAP ASC 958-605, "Not-for-Profit Entities - Revenue Recognition." The standard was effective January 1, 2022, and the Registrants adopted this standard prospectively. As further discussed in Note 14, the ODFA issued securitization bonds in July 2022, and, in connection with this securitization transaction, OG&E received approximately $ 750 million from the ODFA to fund the extreme fuel and purchased power costs incurred by OG&E during Winter Storm Uri. The Registrants accounted for this transaction by analogy to the grant model under International Accounting Standards 20, as the Registrants believe there is no specific GAAP guidance directly applicable to the Registrants' facts and circumstances. The Registrants recorded the receipt of proceeds from the ODFA and removal of the Oklahoma Winter Storm Uri regulatory asset by debiting Cash and Cash Equivalents and crediting Regulatory Assets in their 2022 condensed balance sheets. Further, this transaction is reflected within Operating Activities in the Registrants' 2022 condensed statements of cash flows. In September 2022, the Financial Accounting Standards Board issued ASU 2022-04, "Liabilities - Supplier Finance Programs (Subtopic 405-50)." The amendments in this update require that a buyer in a supplier finance program disclose in each annual reporting period: (i) the key terms of the program, including a description of the payment terms and assets pledged as security or other forms of guarantees provided for the committed payment to the finance provider and (2) the amount outstanding that remains unpaid by the buyer as of year-end, a description of where those obligations are presented in the balance sheet and a rollforward of those obligations during the annual period. The standard is effective January 1, 2023, except for the amendment on rollforward information, which is effective January 1, 2024. Early adoption is permitted. The Registrants are currently evaluating the impact of adopting this standard on their financial statements. The Registrants believe that other recently adopted and recently issued accounting standards that are not yet effective do not appear to have a material impact on the Registrants' financial position, results of operations or cash flows upon adoption.

Revenue from Contracts with Cus

Revenue from Contracts with Customers (Notes)	12 Months Ended
Revenue from Contracts with Customers (Notes)	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer	3. Revenue Recognition The following table presents OG&E's revenues from contracts with customers disaggregated by customer classification. OG&E's operating revenues disaggregated by customer classification can be found in "OG&E (Electric Company) Results of Operations" within "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations." Year Ended December 31, (In millions) 2022 2021 2020 Residential $ 1,272.6 $ 1,309.1 $ 842.7 Commercial 803.5 749.2 465.6 Industrial 317.2 323.0 192.6 Oilfield 304.2 312.8 169.2 Public authorities and street light 291.6 284.4 172.3 System sales revenues 2,989.1 2,978.5 1,842.4 Provision for rate refund ( 1.2 ) — 3.8 Integrated market 163.8 468.9 49.6 Transmission 131.7 140.2 143.3 Other 20.8 1.1 30.7 Revenues from contracts with customers $ 3,304.2 $ 3,588.7 $ 2,069.8

Leases

Leases	12 Months Ended
Leases	Dec. 31, 2022
Leases [Abstract]
Leases	4. Leases Based on their evaluation of all contracts under ASC 842, as described in Note 1, the Registrants concluded they have operating lease obligations as described below. OG&E Railcar Lease Agreement OG&E holds a railcar lease agreement for 780 rotary gondola railcars to transport coal from Wyoming to OG&E's coal-fired generation units. Rental payments are charged to fuel expense and are recoverable through OG&E's fuel adjustment clauses. On February 1, 2024, OG&E has the option to either purchase the railcars at a stipulated fair market value or renew the lease. If OG&E chooses not to purchase the railcars or renew the lease agreement and the actual fair value of the railcars is less than the stipulated fair market value, OG&E would be responsible for the difference in those values up to a maximum of $ 6.8 million. Effective October 1, 2022, OG&E entered into an additional railcar lease agreement for 135 rotary gondola railcars to transport coal with a term of October 1, 2022 to December 31, 2025. OG&E Wind Farm Land Lease Agreements OG&E has operating leases related to land for OG&E's Centennial, OU Spirit and Crossroads wind farms with terms of 25 to 30 years. The Centennial lease has rent escalations which increase annually based on the Consumer Price Index. While le ase liabilities are not remeasured as a result of changes to the Consumer Price Index, changes to the Consumer Price Index are treated as variable lease payments and recognized in the period in which the obligation for those payments was incurred. The OU Spirit and Crossroads leases have rent escalations which increase after five and 10 years. Although the leases are cancellable, OG&E is required to make annual lease payments as long as the wind turbines are located on the land. OG&E does not expect to terminate the leases until the wind turbines reach the end of their useful life. Financial Statement Information and Maturity Analysis of Lease Liabilities The following tables present amounts recognized for operating leases in the Registrants' income statements, cash flow statements and balance sheets and supplemental information related to those amounts recognized. OGE Energy OG&E Year Ended December 31, Year Ended December 31, (In millions) 2022 2021 2020 2022 2021 2020 Operating lease cost $ 5.9 $ 6.3 $ 6.4 $ 5.9 $ 5.7 $ 5.5 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 5.3 $ 6.3 $ 6.4 $ 5.3 $ 5.7 $ 5.5 Right-of-use assets obtained in exchange for new operating lease liabilities $ 1.5 $ — $ 1.4 $ 1.5 $ — $ 1.4 OGE Energy OG&E (Dollars in millions) December 31, 2022 December 31, 2021 December 31, 2022 December 31, 2021 Right-of-use assets at period end (A) $ 30.2 $ 33.0 $ 30.2 $ 33.0 Operating lease liabilities at period end (B) $ 34.8 $ 37.6 $ 34.8 $ 37.6 Operating lease weighted-average remaining lease term (in years) 11.6 12.2 11.6 12.2 Operating lease weighted-average discount rate 4.0 % 3.9 % 4.0 % 3.9 % (A) Included in Property, Plant and Equipment in the Registrants' balance sheets. (B) Included in Other Deferred Credits and Other Liabilities in the Registrants' balance sheets. The following table presents a maturity analysis of the Registrants' operating lease liabilities. Future minimum operating lease payments as of December 31: OGE Energy OG&E (In millions) 2023 $ 5.7 $ 5.7 2024 3.7 3.7 2025 3.5 3.5 2026 3.0 3.0 2027 3.0 3.0 Thereafter 25.7 25.7 Total future minimum lease payments 44.6 44.6 Less: Imputed interest 9.8 9.8 Present value of net minimum lease payments $ 34.8 $ 34.8

Fair Value Measurements

Fair Value Measurements	12 Months Ended
Fair Value Measurements	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	5. Fair Value Measurements The classification of the Registrants' fair value measurements requires judgment regarding the degree to which market data is observable or corroborated by observable market data. GAAP establishes a fair value hierarchy that prioritizes the inputs used to measure fair value based on observable and unobservable data. The hierarchy categorizes the inputs into three levels, with the highest priority given to quoted prices in active markets for identical unrestricted assets or liabilities (Level 1) and the lowest priority given to unobservable inputs (Level 3). Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The three levels defined in the fair value hierarchy are as follows: Level 1 inputs are quoted prices in active markets for identical unrestricted assets or liabilities that are accessible at the measurement date. Level 2 inputs are inputs other than quoted prices in active markets included within Level 1 that are either directly or indirectly observable at the reporting date for the asset or liability for substantially the full term of the asset or liability. Level 2 inputs include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. Level 3 inputs are prices or valuation techniques for the asset or liability that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). Unobservable inputs reflect the reporting entity's own assumptions about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk). OG&E had no financial instruments measured at fair value on a recurring basis at December 31, 2022 and 2021. The following table presents OGE Energy's previous financial instrument measured at fair value on a recurring basis and the carrying amount and fair value of the Registrants' financial instruments at December 31, 2022 and 2021, as well as the classification level within the fair value hierarchy. As of the end of September 2022, OGE Energy had sold all of the Energy Transfer limited partner units it received as a result of the merger transaction between Enable and Energy Transfer in December 2021. 2022 2021 December 31 (In millions) Carrying Fair Carrying Fair Classification Financial instrument measured at fair value on a recurring basis: OGE Energy investment in Energy Transfer's equity securities $ — $ — $ 785.1 $ 785.1 Level 1 Financial instruments for which fair value is only disclosed: Long-term Debt (including Long-term Debt due within one year): OGE Energy Senior Notes $ 499.9 $ 491.2 $ 499.9 $ 497.8 Level 2 OGE Energy Term Loan $ 49.8 $ 50.0 $ — $ — Level 2 OG&E Senior Notes $ 3,854.2 $ 3,477.1 $ 3,851.8 $ 4,460.2 Level 2 OG&E Industrial Authority Bonds $ 135.4 $ 135.4 $ 135.4 $ 135.4 Level 2 Tinker Debt $ 9.3 $ 7.3 $ 9.3 $ 10.0 Level 3

Stock Based Compensation

Stock Based Compensation	12 Months Ended
Stock Based Compensation	Dec. 31, 2022
Stock-Based Compensation [Abstract]
Stock-Based Compensation	6. Stock-Based Compensation In 2022, OG E Energy adopted, and its shareholders approved, the 2022 Stock Incentive Plan. The 2022 Stock Incentive Plan replaced the 2013 Stock Incentive Plan, and no further awards will be granted under the 2013 Stock Incentive Plan. Under the 2022 Stock Incentive Plan, restricted stock, restricted stock units, stock options, stock appreciation rights and performance units may be granted to officers, directors and other key employees of OGE Energy and its subsidiaries, including OG&E. OGE Energy has authorized the issuance of up to 8,417,755 shares under the 2022 Stock Incentive Plan. The following table presents the Registrants' pre-tax compensation expense and related income tax benefit for the years ended December 31, 2022, 2021 and 2020 related to performance units and restricted stock units for the Registrants' employees. OGE Energy OG&E Year Ended December 31 (In millions) 2022 2021 2020 2022 2021 2020 Performance units: Total shareholder return $ 7.2 $ 7.5 $ 7.9 $ 2.2 $ 1.8 $ 2.3 Earnings per share (A) — — 1.0 — — 0.3 Total performance units 7.2 7.5 8.9 2.2 1.8 2.6 Restricted stock units 2.5 2.3 0.9 0.7 0.4 0.4 Total compensation expense $ 9.7 $ 9.8 $ 9.8 $ 2.9 $ 2.2 $ 3.0 Income tax benefit $ 2.3 $ 2.5 $ 2.5 $ 0.7 $ 0.6 $ 0.8 (A) In 2019, the Compensation Committee of OGE Energy's Board of Directors voted to grant restricted stock units in lieu of performance units based on earnings per share. The final grants of performance units based on earnings per share vested as of December 31, 2020 and were paid out in March 2021. During the year ended December 31, 2020, OGE Energy purchased 405,000 shares of its common stock, and 247,252 of these shares were used during 2020 to satisfy payouts of earned performance units and restricted stock unit grants to the Registrants' employees pursuant to OGE Energy's 2013 Stock Incentive Plan. During the year ended December 31, 2020, there was also an immaterial number of shares of new common stock issued pursuant to OGE Energy's 2013 Stock Incentive Plan to satisfy restricted stock unit grants to employees. During the year ended December 31, 2021 , 154,523 shares of treasury stock were used to satisfy payouts of earned performance units and restricted stock unit grants to the Registrants' employees pursuant to OGE Energy's 2013 Stock Incentive Plan. During the year ended December 31, 2022, OGE Energy issued 27,278 shares of new common stock pursuant to OGE Energy's 2013 Stock Incentive Plan and issued an immaterial amount of treasury stock to satisfy payouts of restricted stock unit grants to the Registrants' employees. Performance Units Under the 2013 Stock Incentive Plan, OGE Energy has issued performance units which represent the value of one share of OGE Energy's common stock. The performance units provide for accelerated vesting if there is a change in control (as defined in the 2013 Stock Incentive Plan). Each performance unit is subject to forfeiture if the recipient terminates employment with OGE Energy or a subsidiary prior to the end of the primarily three-year award cycle for any reason other than death, disability or retirement. In the event of death, disability or retirement, a participant will receive a prorated payment based on such participant's number of full months of service during the award cycle, further adjusted based on the achievement of the performance goals during the award cycle. The Registrants estimate expected forfeitures in accounting for performance unit compensation expense. The performance units granted based on total shareholder return are contingently awarded and will be payable in shares of OGE Energy's common stock subject to the condition that the number of performance units, if any, earned by the employees upon the expiration of a primarily three-year award cycle (i.e., three-year cliff vesting period) is dependent on OGE Energy's total shareholder return ranking relative to a peer group of companies. These performance units are classified as equity in the balance sheets. If there is no or only a partial payout for the performance units at the end of the award cycle, the unearned performance units are cancelled. Payout requires approval of the Compensation Committee of OGE Energy's Board of Directors. Payouts, if any, are all made in common stock and are considered made when the payout is approved by the Compensation Committee. The fair value of the performance units based on total shareholder return was estimated on the grant date using a lattice-based valuation model that factors in information, including the expected dividend yield, expected price volatility, risk-free interest rate and the probable outcome of the market condition, over the expected life of the performance units. Compensation expense for the performance units is a fixed amount determined at the grant date fair value and is recognized over the primarily three-year award cycle regardless of whether performance units are awarded at the end of the award cycle. Dividends are accrued on a quarterly basis pending achievement of payout criteria and are included in the fair value calculations. Expected price volatility is based on the historical volatility of OGE Energy's common stock for the past three years and is simulated using the Geometric Brownian Motion process. The risk-free interest rate for the performance unit grants is based on the three-year U.S. Treasury yield curve in effect at the time of the grant. The expected life of the units is based on the non-vested period since inception of the award cycle. There are no post-vesting restrictions related to OGE Energy's performance units based on total shareholder return. The following table presents the number of performance units granted based on total shareholder return and the assumptions used to calculate the grant date fair value of the performance units based on total shareholder return. OGE Energy OG&E 2022 2021 2020 2022 2021 2020 Number of units granted 216,437 249,909 201,552 60,923 68,720 67,975 Fair value of units granted $ 41.10 $ 38.14 $ 38.03 $ 41.10 $ 38.14 $ 38.03 Expected dividend yield 4.8 % 4.7 % 3.5 % 4.8 % 4.7 % 3.5 % Expected price volatility 29.0 % 29.0 % 15.0 % 29.0 % 29.0 % 15.0 % Risk-free interest rate 1.71 % 0.22 % 1.17 % 1.71 % 0.22 % 1.17 % Expected life of units (in years) 2.85 2.84 2.85 2.85 2.85 2.85 Restricted Stock Units Under the 2013 Stock Incentive Plan, OGE Energy has issued restricted stock units to certain existing non-officer employees as well as other executives upon hire to attract and retain individuals to be competitive in the marketplace. The restricted stock units vest primarily in a three-year award cycle (i.e., three-year cliff vesting period). Prior to vesting, each restricted stock unit is subject to forfeiture if the recipient ceases to render substantial services to OGE Energy or a subsidiary. These restricted stock units may not be sold, assigned, transferred or pledged and are subject to a risk of forfeiture. The fair value of the restricted stock units was based on the closing market price of OGE Energy's common stock on the grant date. Compensation expense for the restricted stock units is a fixed amount determined at the grant date fair value and is recognized as services are rendered by employees over a primarily three-year vesting period. Also, for those restricted stock units that vest in one-third annual increments over a three-year cycle, OGE Energy treats its restricted stock units as multiple separate awards by recording compensation expense separately for each tranche whereby a substantial portion of the expense is recognized in the earlier years in the requisite service period. Dividends will only be paid on restricted stock unit awards that vest; therefore, only the present value of dividends expected to vest are included in the fair value calculations. The expected life of the restricted stock units is based on the non-vested period since inception of the primarily three-year award cycle. There are no post-vesting restrictions related to OGE Energy's restricted stock units. The following table presents the number of restricted stock units granted and the grant date fair value. OGE Energy OG&E 2022 2021 2020 2022 2021 2020 Restricted stock units granted 116,539 89,197 67,193 32,804 22,911 22,665 Fair value of restricted stock units granted $ 35.72 $ 31.11 $ 43.69 $ 35.72 $ 30.91 $ 43.69 Performance Units and Restricted Stock Units Activity The following tables present a summary of the activity for the Registrants' performance units and restricted stock units for the year ended December 31, 2022. The table designated as "OGE Energy" below includes the OG&E standalone activity, as OGE Energy represents consolidated results. OGE Energy Performance Units Restricted Stock Units (Dollars in millions) Number Aggregate Intrinsic Value Number Aggregate Intrinsic Value Units/shares outstanding at 12/31/21 581,252 133,671 Granted 216,437 (A) 116,539 Converted ( 172,748 ) (B) $ — N/A Vested N/A ( 47,995 ) $ 1.9 Forfeited ( 16,566 ) ( 12,732 ) Units/shares outstanding at 12/31/22 608,375 $ 34.1 189,483 $ 7.5 Units/shares fully vested at 12/31/22 161,690 (C) $ 3.7 N/A N/A OG&E Performance Units Restricted Stock Units (Dollars in millions) Number Aggregate Intrinsic Value Number Aggregate Intrinsic Value Units/shares outstanding at 12/31/21 161,310 35,613 Granted 60,923 (A) 32,804 Converted ( 48,195 ) (B) $ — N/A Vested N/A ( 11,807 ) $ 0.5 Forfeited ( 4,217 ) ( 4,342 ) Employee migration 802 (D) 491 (D) Units/shares outstanding at 12/31/22 170,623 $ 9.6 52,759 $ 2.1 Units/shares fully vested at 12/31/22 44,550 (C) $ 1.0 N/A N/A (A) For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from zero percent to 200 percent of the target. (B) These amounts represent performance units that were canceled at December 31, 2021 due to the performance metric threshold not being met. (C) These amounts represent performance units that vested at December 31, 2022. Actual expected amounts to be paid out in 2023 will differ based on the percentage at which the performance metric was met and are dependent upon Compensation Committee approval. (D) Due to certain employees transferring between OG&E and OGE Energy. The following tables present a summary of the activity for the Registrants' non-vested performance units and restricted stock units for the year ended December 31, 2022. The table designated as "OGE Energy" below includes the OG&E standalone activity, as OGE Energy represents consolidated results. OGE Energy Performance Units Restricted Stock Units Number Weighted-Average Number Weighted-Average Units/shares non-vested at 12/31/21 408,504 $ 38.05 133,671 $ 35.64 Granted 216,437 (A) $ 41.10 116,539 $ 35.72 Vested ( 161,690 ) $ 38.04 ( 47,995 ) $ 39.63 Forfeited ( 16,566 ) $ 39.45 ( 12,732 ) $ 35.95 Units/shares non-vested at 12/31/22 446,685 $ 39.53 189,483 $ 33.75 OG&E Performance Units Restricted Stock Units Number Weighted-Average Number Weighted-Average Units/shares non-vested at 12/31/21 113,115 $ 38.10 35,613 $ 35.52 Granted 60,923 (A) $ 41.10 32,804 $ 35.72 Vested ( 44,550 ) $ 38.03 ( 11,807 ) $ 39.71 Forfeited ( 4,217 ) $ 39.96 ( 4,342 ) $ 35.93 Employee migration 802 (B) $ 42.18 491 (B) $ 34.83 Units/shares non-vested at 12/31/22 126,073 $ 39.53 52,759 $ 33.78 (A) For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from zero percent to 200 percent of the target. (B) Due to certain employees transferring between OG&E and OGE Energy. Fair Value of Vested Performance Units and Restricted Stock Units The following table presents a summary of the Registrants' fair value for vested performance units and restricted stock units. OGE Energy OG&E Year Ended December 31 (In millions) 2022 2021 2020 2022 2021 2020 Performance units: Total shareholder return $ 6.2 $ 8.1 $ 8.7 $ 1.7 $ 2.3 $ 2.8 Earnings per share $ — $ — $ 2.5 $ — $ — $ 0.8 Restricted stock units $ 2.1 $ 2.2 $ 0.1 $ 0.5 $ 0.5 $ 0.1 Unrecognized Compensation Cost The following table presents a summary of the Registrants' unrecognized compensation cost for non-vested performance units and restricted stock units and the weighted-average periods over which the compensation cost is expected to be recognized. OGE Energy OG&E December 31, 2022 Unrecognized (In millions) Weighted Average (In years) Unrecognized (In millions) Weighted Average (In years) Performance units $ 7.7 1.66 $ 2.2 1.65 Restricted stock units 3.5 1.76 0.7 1.77 Total unrecognized compensation cost $ 11.2 $ 2.9

Income Taxes

Income Taxes	12 Months Ended
Income Taxes	Dec. 31, 2022
Income Taxes [Abstract]
Income Taxes	7. Income Taxes Income Tax Expense (Benefit) The following table presents the components of income tax expense (benefit). OGE Energy OG&E Year Ended December 31 (In millions) 2022 2021 2020 2022 2021 2020 Provision (benefit) for current income taxes: Federal $ 250.8 $ 16.4 $ 8.4 $ ( 141.2 ) $ ( 9.0 ) $ ( 3.8 ) State 28.8 1.7 0.5 ( 0.9 ) 9.0 ( 0.6 ) Total provision (benefit) for current income taxes 279.6 18.1 8.9 ( 142.1 ) — ( 4.4 ) Provision (benefit) for deferred income taxes, net: Federal ( 110.8 ) 133.1 ( 105.2 ) 219.9 58.3 45.7 State ( 45.2 ) ( 10.0 ) ( 31.1 ) ( 1.4 ) ( 16.5 ) ( 6.6 ) Total provision (benefit) for deferred income taxes, net ( 156.0 ) 123.1 ( 136.3 ) 218.5 41.8 39.1 Total income tax expense (benefit) $ 123.6 $ 141.2 $ ( 127.4 ) $ 76.4 $ 41.8 $ 34.7 OGE Energy files consolidated income tax returns in the U.S. federal jurisdiction and various state jurisdictions. OG&E is a part of the consolidated income tax return of OGE Energy. With few exceptions, the Registrants are no longer subject to U.S. federal tax or state and local examinations by tax authorities for years prior to 2018. Income taxes are generally allocated to each company in the affiliated group, including OG&E, based on its stand-alone taxable income or loss. Federal investment tax credits previously claimed on electric company property have been deferred and will be amortized to income over the life of the related property. Additionally, OG&E earned federal tax credits associated with production from its wind facilities through January 2022. Oklahoma production and investment state tax credits are also earned on investments in electric and solar generating facilities which further reduce OG&E's effective tax rate. The following table presents a reconciliation of the statutory tax rates to the effective income tax rate. OGE Energy OG&E Year Ended December 31 2022 2021 2020 2022 2021 2020 Statutory federal tax rate 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % State income taxes, net of federal income tax ( 1.0 ) 0.9 ( 1.4 ) ( 0.4 ) ( 1.4 ) ( 1.6 ) Stock-based compensation — 0.1 ( 0.3 ) — — — Executive compensation limitation 0.1 0.1 0.2 — — — Amortization of net unfunded deferred taxes ( 3.2 ) ( 2.1 ) ( 4.4 ) ( 5.0 ) ( 4.6 ) ( 4.8 ) Federal renewable energy credit (A) — ( 2.0 ) ( 5.0 ) — ( 4.4 ) ( 5.4 ) Remeasurement of state deferred taxes due to Energy Transfer merger (B) — ( 1.1 ) — — — — Remeasurement of state deferred tax liabilities ( 0.6 ) ( 0.6 ) 0.9 — — — 401(k) dividends ( 0.2 ) ( 0.2 ) ( 0.4 ) — — — Impairment of OGE Energy's investment in Enable (C) — — 31.6 — — — Other ( 0.4 ) — 0.1 ( 0.8 ) ( 0.2 ) 0.1 Effective income tax rate 15.7 % 16.1 % 42.3 % 14.8 % 10.4 % 9.3 % (A) Represents credits primarily associated with the production from OG&E's wind farms. (B) In connection with the Enable and Energy Transfer merger, the state income tax rates were expected to decrease, as Energy Transfer operates in significantly more states with generally lower tax rates than the historic Enable operating area. (C) As discussed in Note 1, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable in March 2020, which resulted in a tax benefit being recorded that caused a significant variance to the effective tax rate. This variance has been presented in the table as a single line item in order to facilitate comparability of other components of the effective tax rate. The deferred tax provisions are recognized as costs in the ratemaking process by the commissions having jurisdiction over the rates charged by OG&E. The following table presents the components of Deferred Income Taxes at December 31, 2022 and 2021. OGE Energy OG&E December 31 (In millions) 2022 2021 2022 2021 Deferred income tax liabilities, net: Accelerated depreciation and other property related differences $ 1,714.5 $ 1,677.3 $ 1,714.5 $ 1,677.3 Investment in Energy Transfer's equity securities — 363.5 — — Regulatory assets 54.8 52.1 54.7 52.1 Pension Plan 18.0 10.7 35.4 32.0 Other ( 5.1 ) 7.4 ( 5.8 ) ( 4.7 ) Derivative instruments 2.4 2.2 — — Bond redemption-unamortized costs 1.6 1.8 1.6 1.8 Income taxes recoverable from customers, net ( 216.7 ) ( 225.8 ) ( 216.7 ) ( 225.8 ) State tax credits ( 221.2 ) ( 221.2 ) ( 208.5 ) ( 205.9 ) Federal tax credits — ( 208.4 ) — ( 209.8 ) Regulatory liabilities ( 60.8 ) ( 72.0 ) ( 60.8 ) ( 72.0 ) Asset retirement obligations ( 18.8 ) ( 19.4 ) ( 18.8 ) ( 19.4 ) Postretirement medical and life insurance benefits ( 19.2 ) ( 19.2 ) ( 12.7 ) ( 13.0 ) Accrued liabilities ( 11.2 ) ( 9.5 ) ( 7.3 ) ( 7.3 ) Deferred federal investment tax credits ( 2.9 ) ( 3.1 ) ( 2.9 ) ( 3.1 ) Net operating losses — ( 1.0 ) — — Accrued vacation ( 1.4 ) ( 1.5 ) ( 1.1 ) ( 1.2 ) Uncollectible accounts ( 0.5 ) ( 0.6 ) ( 0.5 ) ( 0.6 ) Total deferred income tax liabilities, net $ 1,233.5 $ 1,333.3 $ 1,271.1 $ 1,000.4 As of December 31, 2022 , the Registrants have classified $ 16.4 million of unrecognized tax benefits as a reduction of deferred tax assets recorded. Management is currently unaware of any issues under review that could result in significant additional payments, accruals or other material deviation from this amount. The following table presents a reconciliation of the Registrants' total gross unrecognized tax benefits as of the years ended December 31, 2022, 2021 and 2020. (In millions) 2022 2021 2020 Balance at January 1 $ 22.4 $ 21.9 $ 20.7 Tax positions related to current year: Additions — 1.7 1.2 Reductions ( 1.7 ) ( 1.2 ) — Balance at December 31 $ 20.7 $ 22.4 $ 21.9 As of December 31, 2022, 2021 and 2020 , there were $ 16.4 million, $ 18.1 million and $ 17.6 million, respectively, of unrecognized tax benefits that, if recognized, would affect the annual effective tax rate. Where applicable, the Registrants classify income tax-related interest and penalties as interest expense and other expense, respectively. During the years ended December 31, 2022, 2021 and 2020 , there were no income tax-related interest or penalties recorded with regard to uncertain tax positions. The Registrants recognize tax benefits from an uncertain tax position only if it is more likely than not the tax position will be sustained on examination by taxing authorities based on the technical merits of the position. The tax benefits in the financial statements from such positions are then measured based on the largest benefit that has a greater than 50 pe rcent likelihood of being realized on settlement. In 2022, the reserve for certain federal research and development credits of $ 1.7 million, which was recorded in 2021, was reversed. The Registrants sustained federal and state tax operating losses through 2012 caused primarily by bonus depreciation and other book versus tax temporary differences. Federal and state net operating losses generated during those years have been fully utilized, and the related various tax credits are being carried as deferred tax assets and will be utilized in future periods. Under current law, the Registrants anticipate future taxable income will be sufficient to utilize all credits before they begin to expire after 2022 . The following table presents a summary of these carry forwards. OGE Energy OG&E (In millions) Carry Forward Amount Deferred Tax Asset Carry Forward Amount Deferred Tax Asset Earliest Expiration Date State tax credits: Oklahoma investment tax credits $ 242.8 $ 191.8 $ 226.7 $ 179.1 N/A Oklahoma capital investment board credits $ 12.8 $ 12.8 $ 12.8 $ 12.8 N/A Oklahoma zero emission tax credits $ 22.6 $ 16.6 $ 22.6 $ 16.6 2023 N/A - not applicable In connection with its investment in Energy Transfer during 2022, OGE Energy anticipates operating losses in various state jurisdictions. As discussed in Note 1, OGE Energy has fully disposed of its investment in Energy Transfer, and it does not expect future taxable income in these states. Therefore, as of December 31, 2022, OGE Energy has recorded a valuation allowance of $ 2.7 million, which eliminated the related deferred tax asset balance. OGE Energy did no t record any valuation allowances as of December 31, 2021.

Common Equity

Common Equity	12 Months Ended
Common Equity	Dec. 31, 2022
Equity [Abstract]
Common Equity	8. Common Equity OGE Energy Automatic Dividend Reinvestment and Stock Purchase Plan OGE Energy issued no new shares of common stock under its Automatic Dividend Reinvestment and Stock Purchase Plan in 2022. Under the terms of the Automatic Dividend Reinvestment and Stock Purchase Plan, OGE Energy may, from time to time, issue new shares to satisfy purchases under the plan or have shares purchased on the open market. At December 31, 2022 , there were 3,932,647 shares of unissued common stock reserved for issuance under OGE Energy's Automatic Dividend Reinvestment and Stock Purchase Plan. Earnings (Loss) Per Share Basic earnings (loss) per share is calculated by dividing net income (loss) attributable to OGE Energy by the weighted average number of OGE Energy's common shares outstanding during the period. In the calculation of diluted earnings (loss) per share, weighted average shares outstanding are increased for additional shares that would be outstanding if potentially dilutive securities were converted to common stock. Potentially dilutive securities for OGE Energy consist of performance units and restricted stock units. The following table presents the calculation of basic and diluted earnings (loss) per share for OGE Energy. (In millions except per share data) 2022 2021 2020 Net income (loss) $ 665.7 $ 737.3 $ ( 173.7 ) Average common shares outstanding: Basic average common shares outstanding 200.2 200.1 200.1 Effect of dilutive securities: Contingently issuable shares (performance and restricted stock units) 0.6 0.2 — Diluted average common shares outstanding 200.8 200.3 200.1 Basic earnings (loss) per average common share $ 3.33 $ 3.68 $ ( 0.87 ) Diluted earnings (loss) per average common share $ 3.32 $ 3.68 $ ( 0.87 ) Anti-dilutive shares excluded from earnings per share calculation — — 0.3 Dividend Restrictions OGE Energy's Certificate of Incorporation places restrictions on the amount of common stock dividends it can pay when preferred stock is outstanding. Before OGE Energy can pay any dividends on its common stock, the holders of any of its preferred stock that may be outstanding are entitled to receive their dividends at the respective rates as may be provided for the shares of their series. As there is no preferred stock outstanding, that restriction did not place any effective limit on OGE Energy's ability to pay dividends to its shareholders. OGE Energy utilizes dividends from OG&E to pay dividends to its shareholders. On December 19, 2022, OGE Energy entered into an amendment to its revolving credit facility that increased the permitted leverage ratio (percentage of debt to total capitalization) for OGE Energy from an amount not to exceed 65 percent to an amount not to exceed 70 percent. The payment of cash divi dends indirectly results in an increase in the percentage of debt to total capitalization, which results in the restriction of approximately $ 816.9 million of OGE Energy's retained earnings from being paid out in dividends. Accordingly, approximately $ 2.5 billion of OGE Energy's retained e arnings as of December 31, 2022 are unrestricted for the payment of dividends. OG&E There were no new shares of OG&E common stock issued in 2022, 2021 or 2020 . Dividend Restrictions Pursuant to the Federal Power Act, OG&E is restricted from paying dividends from its capital accounts. Dividends are paid from retained earnings. Pursuant to the leverage restriction in OG&E's revolving credit agreement, OG&E must maintain a percentage of debt to total capitalization at a level that does not exceed 65 percent. The payment of cash dividends indirectly results in an increase in the percentage of debt to total capitalization, which results in the restriction of approximately $ 579.3 million of OG&E's retained earnings from being paid out in dividends. Accordingly, approximately $ 2.9 billion of OG&E's retained earnings as of December 31, 2022 are unrestricted for the payment of dividends.

Long-Term Debt

Long-Term Debt	12 Months Ended
Long-Term Debt	Dec. 31, 2022
Long-term Debt, Unclassified [Abstract]
Long-Term Debt	9. Long-Term Debt A summary of the Registrants' long-term debt is included in the statements of capitalization. At December 31, 2022, the Registrants were in compliance with all of their debt agreements. Maturities of OGE Energy's consolidated long-term debt during the next five years consist of $ 1.0 billion in 2023, $ 129.4 million in 2025 and $ 181.0 million in 2027. Maturities of OG&E's long-term debt during the next five years consist of $ 500.0 million in 2023, $ 79.4 million in 2025 and $ 181.0 million in 2027. All other long-term debt of the Registrants matures after 2027. The Registrants have previously incurred costs related to debt refinancing. Unamortized loss on reacquired debt is classified as a Non-Current Regulatory Asset in the balance sheets. Unamortized debt expense and unamortized premium and discount on long-term debt are classified as Long-Term Debt in the balance sheets and are being amortized over the life of the respective debt. In May 2022, OGE Energy entered into a $ 100.0 million floating rate unsecured three-year credit agreement, of which $ 50.0 million is considered a revolving loan and $ 50.0 million is considered a term loan, and borrowed the full $ 50.0 million term loan, in order to preserve general financial flexibility within the company. Advances under this agreement were used to refinance existing indebtedness and for working capital and general corporate purposes of OGE Energy. The credit agreement, under certain circumstances, may be increased to a maximum commitment limit of $ 135.0 million and includes a maximum leverage ratio of 0.65 to 1.0. The other covenants under this credit agreement are substantially the same as OGE Energy's existing $ 550.0 million revolving credit agreement. The credit agreement is scheduled to terminate on May 24, 2025 . At December 31, 2022, the weighted-average interest rate for the amount drawn on the term loan under this credit agreement was 3.48 percent during the year. In January 2023, OG&E issued $ 450.0 million of 5.40 % Senior No tes due January 15, 2033 . The p roceeds from the issuance were added to OG&E's general funds to be used for general corporate purposes, including to help fund the repayment of its $ 500.0 million 0.553 % Senior Notes, Series due May 26, 2023 and the funding of its capital investment program and working capital needs. OG&E Industrial Authority Bonds OG&E has tax-exempt pollution control bonds with optional redemption provisions that allow the holders to request repayment of the bonds on any business day. The following table presents information about these bonds, which can be tendered at the option of the holder during the next 12 months. Series Date Due Amount (In millions) 0.11 % — 3.98 % Garfield Industrial Authority, January 1, 2025 $ 47.0 0.11 % — 3.95 % Muskogee Industrial Authority, January 1, 2025 32.4 0.11 % — 3.98 % Muskogee Industrial Authority, June 1, 2027 56.0 Total (redeemable during next 12 months) $ 135.4 All of these bonds are subject to an optional tender at the request of the holders, at 100 percent of the principal amount, together with accrued and unpaid interest to the date of purchase. The bond holders, on any business day, can request repayment of the bond by delivering an irrevocable notice to the tender agent stating the principal amount of the bond, payment instructions for the purchase price and the business day the bond is to be purchased. The repayment option may only be exercised by the holder of a bond for the principal amount. When a tender notice has been received by the trustee, a third-party remarketing agent for the bonds will attempt to remarket any bonds tendered for purchase. This process occurs once per week. Since the original issuance of these series of bonds in 1995 and 1997, the remarketing agent has successfully remarketed all tendered bonds. If the remarketing agent is unable to remarket any such bonds, OG&E is obligated to repurchase such unremarketed bonds. As OG&E has both the intent and ability to refinance the bonds on a long-term basis and such ability is supported by an ability to consummate the refinancing, the bonds are classified as Long-Term Debt in the balance sheets. OG&E believes that it has sufficient liquidity to meet these obligations.

Short-Term Debt and Credit Faci

Short-Term Debt and Credit Facilities	12 Months Ended
Short-Term Debt and Credit Facilities	Dec. 31, 2022
Short-term Debt [Abstract]
Short-Term Debt and Credit Facilities	10. Short-Term Debt and Credit Facilities The Registrants borrow on a short-term basis, as necessary, by the issuance of commercial paper and by borrowings under their revolving credit agreements. OGE Energy also borrows under term credit agreements maturing in one year or less, as necessary. As of December 31, 2022 , OGE Energy had no short-term debt as compared to $ 486.9 mil lion of short-term debt at December 31, 2021. The following table presents information regarding the Registrants' revolving credit agreements at December 31, 2022. Entity Aggregate Commitment Amount Outstanding (A) Weighted-Average Interest Rate Expiration (In millions) OGE Energy (B) $ 550.0 $ — — (F) December 17, 2027 (G) OGE Energy (C) 50.0 — — (F) May 24, 2025 OG&E (D)(E) 550.0 0.4 1.15 % (F) December 17, 2027 (G) Total $ 1,150.0 $ 0.4 1.15 % (A) Includes direct borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit at December 31, 2022 . (B) This bank facility is available to back up OGE Energy's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility. (C) See Note 9 for further information about this revolving credit facility. (D) This bank facility is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility. (E) OG&E has an intercompany borrowing agreement with OGE Energy whereby OG&E has access to up to $ 450.0 million of OGE Energy's revolving credit amount. This agreement has a termination date of December 17, 2027. At December 31, 2022 , there were $ 84.1 million in intercompany borrowings under this agreement. (F) Represents the weighted-average interest rate for the outstanding borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit. (G) In December 2021, the Registrants entered into unsecured five-year revolving credit agreements totaling $ 1.1 billion. Each of the revolving credit facilities contained an option, which could be exercised up to two times, to extend the term of the respective facility for an additional year. In December 2022, the Registrants each entered into an amendment to their credit facility that extends the term of each credit facility for one year, until December 2027 . Further, each credit facility amendment gives each of the Registrants the option of extending such commitments for up to two additional one-year periods. In December 2022, the Registrants each entered into an amendment to their revolving credit facilities that replaced the LIBOR rate with the SOFR rate. The amendment to OGE Energy's credit facility also increased OGE Energy's maximum debt to capitalization ratio from 65 percent to 70 percent. OG&E's credit facility has a financial covenant requiring that OG&E maintains a maximum debt to capitalization ratio of 65 percent, as defined in such facility. The Registrants' facilities each also contain covenants which restrict the respective borrower and certain of its subsidiaries in respect of, among other things, mergers and consolidations, sales of all or substantially all assets, incurrence of liens and transactions with affiliates. The Registrants' facilities are each subject to acceleration upon the occurrence of any default, including, among others, payment defaults on such facilities, breach of representations, warranties and covenants, acceleration of indebtedness (other than intercompany and non-recourse indebtedness) of $ 100.0 million or more in the aggregate, change of control (as defined in each such facility), nonpayment of uninsured judgments in excess of $ 100.0 million and the occurrence of certain Employee Retirement Income Security Act and bankruptcy events, subject where applicable to specified cure periods. The Registrants' ability to access the commercial paper market could be adversely impacted by a credit ratings downgrade or major market disruptions. Pricing grids associated with the Registrants' credit facilities could cause annual fees and borrowing rates to increase if an adverse rating impact occurs. The impact of any future downgrade could include an increase in the costs of the Registrants' short-term borrowings, but a reduction in the Registrants' credit ratings would not result in any defaults or accelerations. Any future downgrade could also lead to higher long-term borrowing costs and, if below investment grade, would require the Registrants to post collateral or letters of credit. OG&E must obtain regulatory approval from the FERC in order to borrow on a short-term basis. OG&E has the necessary regulatory approvals to incur up to $ 1.0 billion in short-term borrowings at any one time for a two-year period beginning January 1, 2023 and ending December 31, 2024.

Retirement Plans and Postretire

Retirement Plans and Postretirement Benefit Plans	12 Months Ended
Retirement Plans and Postretirement Benefit Plans	Dec. 31, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Retirement Plans and Postretirement Benefit Plans	11. Retirement Plans and Postretirement Benefit Plans OGE Energy sponsors defined benefit pension plans, 401(k) savings plans and other postretirement plans covering certain employees of the Registrants. Pension Plan and Restoration of Retirement Income Plan OGE Energy periodically makes contributions to the Pension Plan considering information such as net periodic pension expense and funded status from OGE Energy's actuarial consultants. Such contributions are intended to provide not only for benefits attributed to service to date but also for those expected to be earned in the future. OGE Energy did not make a contribution to its Pension Plan in 2022 and made a $ 40.0 million contribution to its Pension Plan in 2021 , of which $ 30.0 million was attributed to OG&E in 2021. OGE Energy does not expect it will need to make any contributions to the Pension Plan in 2023. Any contribution to the Pension Plan during 2023 would be a discretionary contribution, anticipated to be in the form of cash, and is not required to satisfy the minimum regulatory funding requirement specified by the Employee Retirement Income Security Act of 1974, as amended. OGE Energy could be required to make additional contributions if the value of its pension trust and postretirement benefit plan trust assets are adversely impacted by a major market disruption in the future. In accordance with ASC Topic 715, "Compensation - Retirement Benefits," a one-time settlement charge is required to be recorded by an organization when lump sum payments or other settlements that relieve the organization from the responsibility for the pension benefit obligation during the plan year exceed the service cost and interest cost components of the organization's net periodic pension cost. During 2022, 2021 and 2020, the Registrants experienced an increase in both the number of employees electing to retire and the amount of lump sum payments paid to such employees upon retirement, which resulted in the Registrants recording pension plan settlement charges as presented in the Pension Plan net periodic benefit cost table below. The pension settlement charges did not require a cash outlay by the Registrants and did not increase total pension expense over time, as the charges were an acceleration of costs that otherwise would be recognized as pension expense in future periods. OGE Energy provides a Restoration of Retirement Income Plan to those participants in OGE Energy's Pension Plan whose benefits are subject to certain limitations of the Code. Participants in the Restoration of Retirement Income Plan receive the same benefits that they would have received under OGE Energy's Pension Plan in the absence of limitations imposed by the federal tax laws. The Restoration of Retirement Income Plan is intended to be an unfunded plan. OG&E's employees participate in OGE Energy's Pension Plan and Restoration of Retirement Income Plan. Obligations and Funded Status The details of the funded status of OGE Energy's Pension Plan, the Restoration of Retirement Income Plan and the postretirement benefit plans and the amounts included in the balance sheets for 2022 and 2021 are included in the following tables. These amounts have been recorded in Accrued Benefit Obligations with the offset in Accumulated Other Comprehensive Loss (except OG&E's portion, which is recorded as a regulatory asset as discussed in Note 1) in the balance sheets. The amounts in Accumulated Other Comprehensive Loss and those recorded as a regulatory asset represent a net periodic benefit cost to be recognized in the statements of income in future periods. The benefit obligation for OGE Energy's Pension Plan and the Restoration of Retirement Income Plan represents the projected benefit obligation, while the benefit obligation for the postretirement benefit plans represents the accumulated postretirement benefit obligation. The accumulated postretirement benefit obligation for OGE Energy's Pension Plan and Restoration of Retirement Income Plan differs from the projected benefit obligation in that the former includes no assumption about future compensation levels. OGE Energy's seconded employee contract with Enable was terminated on December 2, 2021. OGE Energy retains the obligations to the balances and accrued benefits of these former employees as of the termination of the contract. OGE Energy OG&E Pension Plan Restoration of Retirement Pension Plan Restoration of Retirement December 31 (In millions) 2022 2021 2022 2021 2022 2021 2022 2021 Change in benefit obligation Beginning obligations $ 502.9 $ 654.6 $ 5.9 $ 7.8 $ 363.2 $ 484.1 $ 0.5 $ 3.0 Service cost 7.6 11.2 1.1 0.8 6.2 7.7 — — Interest cost 15.7 13.3 0.2 0.1 12.1 9.7 — — Plan settlements ( 95.8 ) ( 158.6 ) ( 1.5 ) ( 4.6 ) ( 38.8 ) ( 120.4 ) — ( 2.9 ) Plan amendments — — — 1.4 — — — — Plan curtailments — — — ( 0.1 ) — — — — Actuarial (gains) losses ( 56.9 ) ( 3.5 ) 0.1 0.5 ( 41.3 ) ( 6.0 ) — 0.4 Benefits paid ( 15.0 ) ( 14.1 ) — — ( 12.9 ) ( 11.9 ) — — Ending obligations $ 358.5 $ 502.9 $ 5.8 $ 5.9 $ 288.5 $ 363.2 $ 0.5 $ 0.5 Change in plans' assets Beginning fair value $ 486.0 $ 570.3 $ — $ — $ 353.0 $ 420.3 $ — $ — Actual return on plans' assets ( 82.2 ) 48.4 — — ( 62.4 ) 35.0 — — Employer contributions — 40.0 0.2 4.6 — 30.0 — 2.9 Plan settlements ( 95.8 ) ( 158.6 ) ( 0.2 ) ( 4.6 ) ( 38.8 ) ( 120.4 ) — ( 2.9 ) Benefits paid ( 15.0 ) ( 14.1 ) — — ( 12.9 ) ( 11.9 ) — — Ending fair value $ 293.0 $ 486.0 $ — $ — $ 238.9 $ 353.0 $ — $ — Funded status at end of year $ ( 65.5 ) $ ( 16.9 ) $ ( 5.8 ) $ ( 5.9 ) $ ( 49.6 ) $ ( 10.2 ) $ ( 0.5 ) $ ( 0.5 ) Accumulated postretirement benefit obligation $ 342.7 $ 475.2 $ 4.8 $ 5.4 $ 275.2 $ 341.0 $ 0.4 $ 0.4 For the year ended December 31, 2022, Pension Plan actuarial gains were primarily due to significantly higher discount rates, partially offset by demographic experience and a larger than expected amount of early 2023 lump sum payouts. For the year ended December 31, 2021, Pension Plan actuarial gains were primarily due to favorable demographic experience and a higher discount rate. These gains were partially offset by a difference in lump sum interest rates and the long-term assumption for Enable seconded employee terminations and more retirements and terminations than expected with lump sum payouts. OGE Energy OG&E Postretirement Benefit Plans Postretirement Benefit Plans December 31 (In millions) 2022 2021 2022 2021 Change in benefit obligation Beginning obligations $ 137.3 $ 144.5 $ 102.4 $ 109.5 Service cost 0.2 0.2 0.1 0.1 Interest cost 3.5 3.4 2.7 2.6 Plan curtailments — 1.9 — — Participants' contributions 3.5 3.5 2.4 2.6 Actuarial (gains) losses ( 29.1 ) ( 3.7 ) ( 21.0 ) ( 2.5 ) Benefits paid ( 13.5 ) ( 12.5 ) ( 10.2 ) ( 9.9 ) Ending obligations $ 101.9 $ 137.3 $ 76.4 $ 102.4 Change in plans' assets Beginning fair value $ 44.3 $ 47.6 $ 39.9 $ 42.7 Actual return on plans' assets ( 8.2 ) ( 0.5 ) ( 7.4 ) ( 0.5 ) Employer contributions 6.7 6.2 5.1 5.0 Participants' contributions 3.5 3.5 2.4 2.6 Benefits paid ( 13.5 ) ( 12.5 ) ( 10.2 ) ( 9.9 ) Ending fair value $ 32.8 $ 44.3 $ 29.8 $ 39.9 Funded status at end of year $ ( 69.1 ) $ ( 93.0 ) $ ( 46.6 ) $ ( 62.5 ) Curtailment loss for the year ended December 31, 2021 is related to Enable seconded employees who terminated employment as a result of the merger with Energy Transfer. This reduction in future service of the active participants triggered curtailment accounting as of December 31, 2021. Net Periodic Benefit Cost The following tables present the net periodic benefit cost components, before consideration of capitalized amounts, of OGE Energy's Pension Plan, Restoration of Retirement Income Plan and postretirement benefit plans that are included in the financial statements. Service cost is presented within Other Operation and Maintenance Expense, and the remaining net period benefit cost components as listed in the following tables are presented within Other Net Periodic Benefit Income (Expense) in the statements of income. OG&E recovers specific amounts of pension and postretirement medical costs in rates approved in its Oklahoma rate reviews. In accordance with approved orders, OG&E defers the difference between actual pension and postretirement medical expenses and the amount approved in its last Oklahoma rate review as a regulatory asset or regulatory liability. These amounts have been recorded in the Pension tracker in the regulatory assets and liabilities table in Note 1 and within Other Net Periodic Benefit Income (Expense) in the statements of income. OGE Energy Pension Plan Restoration of Retirement Year Ended December 31 (In millions) 2022 2021 2020 2022 2021 2020 Service cost $ 7.6 $ 11.2 $ 13.2 $ 1.1 $ 0.8 $ 0.8 I nter e st cost 15.7 13.3 17.0 0.2 0.1 0.2 Expected return on plan assets ( 25.4 ) ( 34.1 ) ( 37.6 ) — — — Amortizatio n of net loss 8.9 9.4 17.1 0.2 0.2 0.5 Plan curta il ments — — — — — 0.2 Special termination benefits — — 7.6 — — — Amortization of unrecognized prior service cost (A) — — — 0.2 0.1 — Settlement cost 30.6 41.3 14.1 0.3 2.1 2.7 Total net periodic benefit cost 37.4 41.1 31.4 2.0 3.3 4.4 Less: Amount paid by unconsolidated affiliates — ( 0.2 ) 2.0 — 0.1 0.1 Net periodic benefit cost $ 37.4 $ 41.3 $ 29.4 $ 2.0 $ 3.2 $ 4.3 (a) Unamortized prior service cost is amortized on a straight-line basis over the average remaining service period to the first eligibility age of participants who are expected to receive a benefit and are active at the date of the plan amendment. OG&E Pension Plan Restoration of Retirement Year Ended December 31 (In millions) 2022 2021 2020 2022 2021 2020 Service cost $ 6.2 $ 7.7 $ 9.2 $ — $ — $ 0.1 Inte r est cost 12.1 9.7 12.6 — — 0.1 Expected return on plan assets ( 19.6 ) ( 24.7 ) ( 27.9 ) — — — Amortization of net loss 7.4 7.0 12.1 — 0.1 0.4 Special termination benefits — — 5.1 — — — Settlement cost 12.9 33.1 11.4 — 1.6 2.4 Total net periodic benefit cost 19.0 32.8 22.5 — 1.7 3.0 Plus: Amount allocated from OGE Energy 5.2 6.5 5.9 1.5 1.5 1.3 Net periodic benefit cost $ 24.2 $ 39.3 $ 28.4 $ 1.5 $ 3.2 $ 4.3 In addition to the net periodic benefit cost amounts recognized, as presented in the table above, for the Pension and Restoration of Retirement Income Plans in 2022, 2021 and 2020, the Registrants recognized the following: Year Ended December 31 (In millions) 2022 2021 2020 Increase of regulatory asset related to pension expense to maintain allowed recoverable amount in Oklahoma jurisdiction (A) $ 15.2 $ 23.0 $ 13.8 Deferral of pension expense related to pension settlement, curtailment and special termination benefits charges included in the above line item: Oklahoma jurisdiction (A) $ 15.4 $ 37.9 $ 21.6 Arkansas jurisdiction (A) $ 1.4 $ 3.5 $ 2.0 (A) Included in the pension regulatory asset in each jurisdiction, as indicated in the regulatory assets and liabilities table in Note 1. OGE Energy OG&E Postretirement Benefit Plans Postretirement Benefit Plans Year Ended December 31 (In millions) 2022 2021 2020 2022 2021 2020 Service cost $ 0.2 $ 0.2 $ 0.2 $ 0.1 $ 0.1 $ 0.2 Interest cost 3.5 3.4 4.2 2.7 2.6 3.2 Expected return on plan assets ( 1.8 ) ( 1.8 ) ( 1.8 ) ( 1.6 ) ( 1.7 ) ( 1.7 ) Amortization of net loss 1.5 2.8 2.0 1.5 2.7 2.1 Plan curtai l ments — — 1.5 — — 1.3 Amortization of unrecognized prior service cost (A) ( 3.8 ) ( 6.9 ) ( 8.4 ) ( 3.6 ) ( 5.0 ) ( 6.1 ) Total net periodic benefit income ( 0.4 ) ( 2.3 ) ( 2.3 ) ( 0.9 ) ( 1.3 ) ( 1.0 ) Less: Amount paid by unconsolidated affiliates (B) — ( 0.5 ) ( 0.7 ) Plus: Amount allocated from OGE Energy (B) — ( 0.5 ) ( 0.5 ) Net periodic benefit income $ ( 0.4 ) $ ( 1.8 ) $ ( 1.6 ) $ ( 0.9 ) $ ( 1.8 ) $ ( 1.5 ) (A) Unamortized prior service cost is amortized on a straight-line basis over the average remaining service period to the first eligibility age of participants who are expected to receive a benefit and are active at the date of the plan amendment. (B) "Amount paid by unconsolidated affiliates" is only applicable to OGE Energy. "Amount allocated from OGE Energy" is only applicable to OG&E. In addition to the net periodic benefit income amounts recognized, as presented in the table above, for the postretirement benefit plans in 2022, 2021 and 2020, the Registrants recognized the following: Year Ended December 31 (In millions) 2022 2021 2020 Increase (decrease) of regulatory liability related to postretirement expense to maintain allowed recoverable amount in Oklahoma jurisdiction (A) $ ( 0.6 ) $ 0.4 $ 1.6 Deferral of postretirement expense related to postretirement plan curtailment charges included in the above line item: Oklahoma jurisdiction (A) $ — $ — $ ( 1.4 ) Arkansas jurisdiction (A) $ — $ — $ ( 0.1 ) (A) Included in the pension regulatory asset or liability in each jurisdiction, as indicated in the regulatory assets and liabilities table in Note 1. The following table presents the amount of net periodic benefit cost capitalized and attributable to each of the Registrants for OGE Energy's Pension Plan and postretirement benefit plans in 2022, 2021 and 2020. OGE Energy OG&E (In millions) 2022 2021 2020 2022 2021 2020 Capitalized portion of net periodic pension benefit cost $ 3.0 $ 3.4 $ 3.8 $ 2.5 $ 2.9 $ 3.1 Capitalized portion of net periodic postretirement benefit cost $ 0.2 $ 0.2 $ 0.2 $ 0.1 $ 0.1 $ 0.1 Rate Assumptions Pension Plan and Postretirement Year Ended December 31 2022 2021 2020 2022 2021 2020 Assumptions to determine benefit obligations: Discount rate 5.45 % 2.75 % 2.30 % 5.40 % 2.80 % 2.45 % Rate of compensation increase 4.20 % 4.20 % 4.20 % N/A N/A N/A Interest crediting rate 3.50 % 3.50 % 3.50 % N/A N/A N/A Assumptions to determine net periodic benefit cost: Discount rate 4.01 % 2.63 % 2.88 % 2.80 % 2.45 % 3.25 % Expected return on plan assets 7.00 % 7.00 % 7.50 % 4.00 % 4.00 % 4.00 % Rate of compensation increase 4.20 % 4.20 % 4.20 % N/A N/A N/A Interest crediting rate 3.50 % 3.50 % 4.00 % N/A N/A N/A N/A - not applicable The discount rate used to compute the present value of plan liabilities is based generally on rates of high-grade corporate bonds with maturities similar to the average period over which benefits will be paid. The discount rate used to determine net benefit cost for the current year is the same discount rate used to determine the benefit obligation as of the previous year's balance sheet date, unless a plan settlement occurs during the current year that requires an updated discount rate for net periodic cost measurement. For 2022 and 2021, the Pension Plan discount rates used to determine net periodic benefit cost are disclosed on a weighted-average basis. The overall expected rate of return on plan assets assumption is used in determining net periodic benefit cost. The rate of return on plan assets assumption is the average long-term rate of earnings expected on the funds currently invested and to be invested for the purpose of providing benefits specified by the Pension Plan or postretirement benefit plans. This assumption is reexamined at least annually and updated as necessary. The rate of return on plan assets assumption reflects a combination of historical return analysis, forward-looking return expectations and the plans' current and expected asset allocation. The assumed health care cost trend rates have a significant effect on the amounts reported for postretirement medical benefit plans. Future health care cost trend rates are assumed to be 6.25 percent in 2023 with the rates trending downward to 4.50 percent by 2030. Pension Plan Pension Plan Investments, Policies and Strategies The Pension Plan assets are held in a trust which follows an investment policy and strategy designed to reduce the funded status volatility of the Plan by utilizing liability driven investing. The purpose of liability-driven investing is to structure the asset portfolio to more closely resemble the pension liability and thereby more effectively hedge against changes in the liability. The investment policy follows a glide path approach that shifts a higher portfolio weighting to fixed income as the Plan's funded status increases. The following table presents the targeted fixed income and equity allocations at different funded status levels. Projected Benefit Obligation Funded Status Thresholds <90% 95% 100% 105% 110% 115% 120% Fixed income 50 % 58 % 65 % 73 % 80 % 85 % 90 % Equity 50 % 42 % 35 % 27 % 20 % 15 % 10 % Total 100 % 100 % 100 % 100 % 100 % 100 % 100 % Within the portfolio's overall allocation to equities, the funds are allocated according to the guidelines in the following table. Asset Class Target Allocation Minimum Maximum Domestic Large Cap Equity 40 % 35 % 60 % Domestic Mid-Cap Equity 15 % 5 % 25 % Domestic Small-Cap Equity 25 % 5 % 30 % International Equity 20 % 10 % 30 % OGE Energy has retained an investment consultant responsible for the general investment oversight, analysis, monitoring investment guideline compliance and providing quarterly reports to certain of the Registrants' members and OGE Energy's Investment Committee. The various investment managers used by the trust operate within the general operating objectives as established in the investment policy and within the specific guidelines established for each investment manager's respective portfolio. The portfolio is rebalanced at least on an annual basis to bring the asset allocations of various managers in line with the target asset allocation listed above. More frequent rebalancing may occur if there are dramatic price movements in the financial markets which may cause the trust's exposure to any asset class to exceed or fall below the established allowable guidelines. To evaluate the progress of the portfolio, investment performance is reviewed quarterly. It is, however, expected that performance goals will be met over a full market cycle, normally defined as a three- to five-year period. Analysis of performance is within the context of the prevailing investment environment and the advisors' investment style. The goal of the trust is to provide a rate of return consistently from three percent to five percent over the rate of inflation (as measured by the national Consumer Price Index) on a fee adjusted basis over a typical market cycle of no less than three years and no more than five years. Each investment manager is expected to outperform its respective benchmark. The following table presents a list of each asset class utilized with appropriate comparative benchmark(s) each manager is evaluated against and the focus of the asset class. Asset Class Comparative Benchmark(s) Focus of Asset Class Active Duration Fixed Income (A)(B) Bloomberg Barclays Aggregate - Maximize risk-adjusted performance while providing long bond exposure managed according to the manager's forecast on interest rates. Long Duration Fixed Income (A)(B) Duration blended Barclays Long Government/Credit & Barclays Universal - Maximize risk-adjusted performance. Equity Index (B)(C) Standard & Poor's 500 Index - Focus on replicating the performance of the S&P 500 Index. Mid-Cap Equity (B)(C) Russell Midcap Index - Focus on undervalued stocks expected to earn average return and pay out higher than average dividends. International Equity (D) Morgan Stanley Capital International ACWI ex-U.S. - Invest in non-dollar denominated equity securities. - Diversify the overall trust investments. (A) Investment grades are by Moody's Investors Service, S&P Global Ratings or Fitch Ratings. (B) The purchase of any of OGE Energy's equity, debt or other securities is prohibited. (C) No more than five percent can be invested in any one stock at the time of purchase and no more than 10 percent after accounting for price appreciation. Options or financial futures may not be purchased unless prior approval from OGE Energy's Investment Committee is received. The purchase of securities on margin, securities lending, private placement purchases and venture capital purchases are prohibited. The aggregate positions in any company may not exceed one percent of the fair market value of its outstanding stock. (D) The manager of this asset class is required to operate under certain restrictions including regional constraints, diversification requirements and percentage of U.S. securities. All securities are freely traded on a recognized stock exchange, and there are no over-the-counter derivatives. The following investment categories are excluded: options (other than traded currency options), commodities, futures (other than currency futures or currency hedging), short sales/margin purchases, private placements, unlisted securities and real estate (but not real estate shares). Pension Plan Investments The following tables present the Pension Plan's investments that are measured at fair value on a recurring basis at December 31, 2022 and 2021 . There were no Level 3 investments held by the Pension Plan at December 31, 2022 and 2021. (In millions) December 31, 2022 Level 1 Level 2 Net Asset Value (A) Common stocks $ 71.9 $ 71.9 $ — $ — U.S. Treasury notes and bonds (B) 44.6 44.6 — — Mortgage- and asset-backed securities 26.2 — 26.2 — Corporate fixed income and other securities 65.5 — 65.5 — Commingled fund (C) 18.2 — — 18.2 Foreign government bonds 0.5 — 0.5 — U.S. municipal bonds 0.9 — 0.9 — Money market fund 5.9 — — 5.9 Mutual fund 60.4 60.4 — — Preferred stocks 1.5 1.5 — — U.S. Treasury futures: Cash collateral 0.3 0.3 — — Forward contracts: Receivable (foreign currency) 0.1 — 0.1 — Total Pension Plan investments 296.0 $ 178.7 $ 93.2 $ 24.1 Interest and dividends receivable 1.6 Receivable from broker for securities sold 20.6 Payable to broker for securities purchased ( 25.2 ) Total OGE Energy Pension Plan assets $ 293.0 Pension Plan investments attributable to affiliates ( 54.1 ) Total OG&E Pension Plan assets $ 238.9 (In millions) December 31, 2021 Level 1 Level 2 Net Asset Value (A) Common stocks $ 86.1 $ 86.1 $ — $ — U.S. Treasury notes and bonds (B) 135.2 135.2 — — Mortgage- and asset-backed securities 24.6 — 24.6 — Corporate fixed income and other securities 107.0 — 107.0 — Commingled fund (C) 23.6 — — 23.6 Foreign government bonds 0.9 — 0.9 — U.S. municipal bonds 1.4 — 1.4 — Money market fund 5.5 — — 5.5 Mutual fund 99.8 99.8 — — Preferred stocks 1.1 1.1 — — U.S. Treasury futures: Cash collateral 0.6 0.6 — — Forward contracts: Receivable (foreign currency) 0.1 — 0.1 — Total Pension Plan investments 485.9 $ 322.8 $ 134.0 $ 29.1 Interest and dividends receivable 2.1 Payable to broker for securities purchased ( 2.0 ) Total OGE Energy Pension Plan assets $ 486.0 Pension Plan investments attributable to affiliates ( 133.0 ) Total OG&E Pension Plan assets $ 353.0 (A) GAAP allows the measurement of certain investments that do not have a readily determinable fair value at the net asset value. These investments do not consider the observability of inputs; therefore, they are not included within the fair value hierarchy. (B) This category represents U.S. Treasury notes and bonds with a Moody's Investors Service rating of Aaa and Government Agency Bonds with a Moody's Investors Service rating of A1 or higher. (C) This category represents units of participation in a commingled fund that primarily invested in stocks of international companies and emerging markets. As defined in the fair value hierarchy, Level 1 inputs are quoted prices in active markets for identical unrestricted assets or liabilities that are accessible by the Pension Plan at the measurement date. Level 2 inputs are inputs other than quoted prices in active markets included within Level 1 that are either directly or indirectly observable at the reporting date for the asset or liability for substantially the full term of the asset or liability. Level 2 inputs include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. Level 3 inputs are prices or valuation techniques for the asset or liability that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). Unobservable inputs reflect the Plan's own assumptions about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk). Expected Benefit Payments The following table presents the benefit payments the Registrants expect to pay related to the Pension Plan and Restoration of Retirement Income Plan. These expected benefits are based on the same assumptions used to measure OGE Energy's benefit obligation at the end of the year and include benefits attributable to estimated future employee service. (In millions) OGE Energy OG&E 2023 $ 92.0 $ 80.1 2024 $ 29.4 $ 23.1 2025 $ 27.7 $ 21.8 2026 $ 28.9 $ 23.0 2027 $ 35.1 $ 21.3 2028-2032 $ 128.6 $ 99.7 Postretirement Benefit Plans In addition to providing pension benefits, OGE Energy provides certain medical and life insurance benefits for eligible retired members. Regular, full-time, active employees hired prior to February 1, 2000 whose age and years of credited service total or exceed 80 or have attained at least age 55 with 10 or more years of service at the time of retirement are entitled to postretirement medical benefits, while employees hired on or after February 1, 2000 are not entitled to postretirement medical benefits. Eligible retirees must contribute such amount as OGE Energy specifies from time to time toward the cost of coverage for postretirement benefits. The benefits are subject to deductibles, co-payment provisions and other limitations. OG&E charges postretirement benefit costs to expense and includes an annual amount as a component of the cost-of-service in future ratemaking proceedings. OGE Energy's contribution to the medical costs for pre-65 aged eligible retirees are fixed at the 2011 level, and OGE Energy covers future annual medical inflationary cost increases up to five percent. Increases in excess of five percent annually are covered by the pre-65 aged retiree in the form of premium increases. OGE Energy provides Medicare-eligible retirees and their Medicare-eligible spouses an annual fixed contribution to an OGE Energy-sponsored health reimbursement arrangement. Medicare-eligible retirees are able to purchase individual insurance policies supplemental to Medicare through a third-party administrator and use their health reimbursement arrangement funds for reimbursement of medical premiums and other eligible medical expenses. Postretirement Plans Investments The following tables present the postretirement benefit plans' investments that are measured at fair value on a recurring basis at December 31, 2022 and 2021 . There were no Level 2 investments held by the postretirement benefit plans at December 31, 2022 and 2021. (In millions) December 31, 2022 Level 1 Level 3 Group retiree medical insurance contract $ 21.6 $ — $ 21.6 Mutual funds 11.2 11.2 — Total OGE Energy plan investments $ 32.8 $ 11.2 $ 21.6 Plan investments attributable to affiliates ( 3.0 ) Total OG&E plan investments $ 29.8 (In millions) December 31, 2021 Level 1 Level 3 Group retiree medical insurance contract $ 28.1 $ — $ 28.1 Mutual funds 16.2 16.2 — Total OGE Energy plan investments $ 44.3 $ 16.2 $ 28.1 Plan investments attributable to affiliates ( 4.4 ) Total OG&E plan investments $ 39.9 The group retiree medical insurance contract invests in a pool of common stocks, bonds and money market accounts, of which a significant portion is comprised of mortgage-backed securities. The unobservable input included in the valuation of the contract includes the approach for determining the allocation of the postretirement benefit plans' pro-rata share of the total assets in the contract. The following table presents a reconciliation of the postretirement benefit plans' investments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3). Year Ended December 31 (In millions) 2022 Group retiree medical insurance contract: Beginning balance $ 28.1 Claims paid ( 4.8 ) Net unrealized losses related to instruments held at the reporting date ( 1.8 ) Investment fees ( 0.1 ) Realized losses ( 0.6 ) Interest income 0.7 Dividend income 0.1 Ending balance $ 21.6 Medicare Prescription Drug, Improvement and Modernization Act of 2003 The Medicare Prescription Drug, Improvement and Modernization Act of 2003 expanded coverage for prescription drugs. The following table presents the gross benefit payments the Registrants expect to pay related to the postretirement benefit plans, including prescription drug benefits. (In millions) OGE Energy OG&E 2023 $ 12.0 $ 9.1 2024 $ 11.7 $ 8.9 2025 $ 10.0 $ 7.5 2026 $ 9.5 $ 7.1 2027 $ 8.9 $ 6.7 After 2027 $ 37.0 $ 27.8 Post-Employment Benefit Plan Disabled employees receiving benefits from OGE Energy's Group Long-Term Disability Plan are entitled to continue participating in OGE Energy's Medical Plan along with their dependents. The post-employment benefit obligation represents the actuarial present value of estimated future medical benefits that are attributed to employee service rendered prior to the date as of which such information is presented. The obligation also includes future medical benefits expected to be paid to current employees participating in the Group Long-Term Disability Plan and their dependents, as defined in OGE Energy's Medical Plan. The post-employment benefit obligation is determined by an actuary on a basis similar to the accumulated postretirement benefit obligation. The estimated future medical benefits are projected to grow with expected future medical cost trend rates and are discounted for interest at the discount rate and for the probability that the participant will discontinue receiving benefits from OGE Energy's Group Long-Term Disability Plan due to death, recovery from disability or eligibility for retiree medical benefits. OGE Energy's post-employment benefit obligation was $ 1.8 million and $ 2.0 million at December 31, 2022 and 2021 , respectively, of which $ 1.3 million and $ 1.5 million, respectively, was OG&E's portion of the obligation. 401(k) Plan OGE Energy provides a 401(k) Plan, and each regular full-time employee of OGE Energy or a participating affiliate is eligible to participate in the 401(k) Plan immediately upon hire. All other employees of OGE Energy or a participating affiliate are eligible to become participants in the 401(k) Plan after completing one year of service as defined in the 401(k) Plan. Participants may contribute each pay period any whole percentage between two percent and 75 percent of their compensation, as defined in the 401(k) Plan, for that pay period. Participants who have reached age 50 before the close of a year are allowed to make additional contributions referred to as "Catch-Up Contributions," subject to certain limitations of the Code. Participants may designate, at their discretion, all or any portion of their contributions as: (i) a before-tax contribution under Section 401(k) of the Code subject to the limitations thereof, (ii) a contribution made on a non-Roth after-tax basis or (iii) a Roth contribution. The 401(k) Plan also includes an eligible automatic contribution arrangement and provides for a qualified default investment alternative consistent with the U.S. Department of Labor regulations. Participants may elect, in accordance with the 401(k) Plan procedures, to have their future salary deferral rate to be automatically increased annually on a date and in an amount as specified by the participant in such election. For employees hired or rehired on or after December 1, 2009, OGE Energy contributes to the 401(k) Plan, on behalf of each participant, 200 percent of the participant's contributions up to five percent of compensation. No OGE Energy contributions are made with respect to a participant's Catch-Up Contributions, rollover contributions or with respect to a participant's contributions based on overtime payments, pay-in-lieu of overtime for exempt personnel, special lump-sum recognition awards and lump-sum merit awards included in compensation for determining the amount of participant contributions. Once made, OGE Energy's contribution may be directed to any available investment option in the 401(k) Plan. OGE Energy match contributions vest over a three-year period. After two years of service, participants become 20 percent vested in their OGE Energy contribution account and become fully vested on completing three years of service. In addition, participants fully vest when they are eligible for normal or early retirement under the Pension Plan requirements, in the event of their t

Report of Business Segments

Report of Business Segments	12 Months Ended
Report of Business Segments	Dec. 31, 2022
Segment Reporting [Abstract]
Report of Business Segments	12. Report of Business Segments OGE Energy reports its operations in two business segments: (i) the electric company segment, which is engaged in the generation, transmission, distribution and sale of electric energy and (ii) natural gas midstream operations segment. Prior to the Enable and Energy Transfer merger closing on December 2, 2021, OGE Energy's natural gas midstream operations segment included its equity method investment in Enable. For the period of December 2, 2021 to September 30, 2022, OGE Energy's natural gas midstream operations segment included OGE Energy's investment in Energy Transfer's equity securities acquired in the merger. For the year ended December 31, 2022, this segment also includes legacy Enable seconded employee pension and postretirement costs. Other operations primarily includes the operations of the holding company. Intersegment revenues are recorded at prices comparable to those of unaffiliated customers and are affected by regulatory considerations. The following tables present the results of OGE Energy's business segments for the years ended December 31, 2022, 2021 and 2020. 2022 Electric Company Natural Gas Midstream Operations Other Eliminations Total (In millions) Operating revenues $ 3,375.7 $ — $ — $ — $ 3,375.7 Fuel, purchased power and direct transmission expense 1,662.4 — — — 1,662.4 Other operation and maintenance 491.9 12.6 ( 3.1 ) — 501.4 Depreciation and amortization 460.9 — — — 460.9 Taxes other than income 98.0 0.1 3.4 — 101.5 Operating income (loss) 662.5 ( 12.7 ) ( 0.3 ) — 649.5 Gain on equity securities — 282.1 — — 282.1 Other income (expense) 11.2 10.0 4.9 ( 2.1 ) 24.0 Interest expense 157.8 — 10.6 ( 2.1 ) 166.3 Income tax expense (benefit) 76.4 48.1 ( 0.9 ) — 123.6 Net income (loss) $ 439.5 $ 231.3 $ ( 5.1 ) $ — $ 665.7 Total assets $ 12,410.5 $ 1.2 $ 683.7 $ ( 550.7 ) $ 12,544.7 Capital expenditures $ 1,050.9 $ — $ — $ — $ 1,050.9 2021 Electric Company Natural Gas Midstream Operations Other Eliminations Total (In millions) Operating revenues $ 3,653.7 $ — $ — $ — $ 3,653.7 Fuel, purchased power and direct transmission expense 2,127.6 — — — 2,127.6 Other operation and maintenance 464.7 1.6 ( 3.2 ) — 463.1 Depreciation and amortization 416.0 — — — 416.0 Taxes other than income 99.3 0.2 3.3 — 102.8 Operating income (loss) 546.1 ( 1.8 ) ( 0.1 ) — 544.2 Equity in earnings of unconsolidated affiliates — 169.8 — — 169.8 Gain on Enable/Energy Transfer transaction, net — 344.4 — — 344.4 Other income (expense) 7.7 ( 26.4 ) ( 2.0 ) ( 0.9 ) ( 21.6 ) Interest expense 152.0 — 7.2 ( 0.9 ) 158.3 Income tax expense (benefit) 41.8 101.0 ( 1.6 ) — 141.2 Net income (loss) $ 360.0 $ 385.0 $ ( 7.7 ) $ — $ 737.3 Total assets $ 11,688.0 $ 786.6 $ 350.3 $ ( 218.5 ) $ 12,606.4 Capital expenditures $ 778.5 $ — $ — $ — $ 778.5 2020 Electric Company Natural Gas Midstream Operations Other Eliminations Total (In millions) Operating revenues $ 2,122.3 $ — $ — $ — $ 2,122.3 Fuel, purchased power and direct transmission expense 644.6 — — — 644.6 Other operation and maintenance 464.4 1.7 ( 3.3 ) — 462.8 Depreciation and amortization 391.3 — — — 391.3 Taxes other than income 97.2 0.4 3.8 — 101.4 Operating income (loss) 524.8 ( 2.1 ) ( 0.5 ) — 522.2 Equity in losses of unconsolidated affiliates (A) — ( 668.0 ) — — ( 668.0 ) Other income (expense) 4.1 ( 2.9 ) 3.6 ( 1.6 ) 3.2 Interest expense 154.8 — 5.3 ( 1.6 ) 158.5 Income tax expense (benefit) 34.7 ( 158.0 ) ( 4.1 ) — ( 127.4 ) Net income (loss) $ 339.4 $ ( 515.0 ) $ 1.9 $ — $ ( 173.7 ) Investment in unconsolidated affiliates $ — $ 374.3 $ — $ — $ 374.3 Total assets $ 10,489.0 $ 378.1 $ 116.4 $ ( 264.7 ) $ 10,718.8 Capital expenditures $ 650.5 $ — $ — $ — $ 650.5 (A) In March 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable .

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	13. Commitments and Contingencies Purchase Obligations and Commitments The following table presents the Registrants' future purchase obligations and commitments estimated for the next five years. (In millions) 2023 2024 2025 2026 2027 Total Purchase obligations and commitments: Minimum purchase commitments $ 110.0 $ 92.2 $ 66.4 $ 24.6 $ 24.6 $ 317.8 Expected wind purchase commitments 56.0 56.6 56.9 57.3 57.7 284.5 Long-term service agreement commitments 2.7 14.5 2.8 17.1 23.8 60.9 Total purchase obligations and commitments $ 168.7 $ 163.3 $ 126.1 $ 99.0 $ 106.1 $ 663.2 OG&E Minimum Purchase Commitments OG&E has coal contracts for purchases through December 31, 2025. OG&E may also purchase coal through spot purchases on an as-needed basis. As a participant in the SPP Integrated Marketplace, OG&E purchases its natural gas supply through short-term agreements. OG&E relies on a combination of natural gas base load agreements and call agreements, whereby OG&E has the right but not the obligation to purchase a defined quantity of natural gas, combined with day and intra-day purchases to meet the demands of the SPP Integrated Marketplace. OG&E has natural gas transportation service contracts with Energy Transfer, ONEOK, Inc. and Southern Star. The contracts with Energy Transfer end in December 2024 and December 2038; the contracts with ONEOK, Inc. end in March 2024 and August 2037; and the contract with Southern Star ends in June 2024. These transportation contracts grant Energy Transfer, ONEOK, Inc. and Southern Star the responsibility of delivering natural gas to OG&E's generating facilities. OG&E Wind Power Purchase Commitments The following table presents OG&E's wind purchased power contracts. Company Location Original Term of Expiration of MWs CPV Keenan Woodward County, OK 20 years 2030 152.0 Edison Mission Energy Dewey County, OK 20 years 2031 130.0 NextEra Energy Blackwell, OK 20 years 2032 60.0 The following table presents a summary of OG&E's wind power purchases for the years ended December 31, 2022, 2021 and 2020. Year Ended December 31 (In millions) 2022 2021 2020 CPV Keenan $ 25.8 $ 27.3 $ 27.5 Edison Mission Energy 24.9 21.7 22.8 NextEra Energy 7.3 6.8 7.0 Total wind power purchased $ 58.0 $ 55.8 $ 57.3 OG&E Long-Term Service Agreement Commitments OG&E has a long-term parts and service maintenance contract for the upkeep of the McClain Plant. In May 2013, a new contract was signed that is expected to run for the earlier of 128,000 factored-fired hours or 4,800 factored-fired starts. In December 2015, the McClain Long-Term Service Agreement was amended to define the terms and conditions for the exchange of spare rotors between OG&E and General Electric International, Inc. Based on historical usage and current expectations for future usage, this contract is expected to run until 2035. The contract requires payments based on both a fixed and variable cost component, depending on how much the McClain Plant is used. OG&E has a long-term parts and service maintenance contract for the upkeep of the Redbud Plant. In March 2013, the contract was amended to extend the contract coverage for an additional 24,000 factored-fired hours resulting in a maximum of the earlier of 144,000 factored-fired hours or 4,500 factored-fired starts. Based on historical usage and current expectations for future usage, this contract is expected to run until 2032. The contract requires payments based on both a fixed and variable cost component, depending on how much the Redbud Plant is used. Environmental Laws and Regulations The activities of OG&E are subject to numerous stringent and complex federal, state and local laws and regulations governing environmental protection. These laws and regulations can change, restrict or otherwise impact the Registrants' business activities in many ways, including the handling or disposal of waste material, planning for future construction activities to avoid or mitigate harm to threatened or endangered species and requiring the installation and operation of emissions or pollution control equipment. Failure to comply with these laws and regulations could result in the assessment of administrative, civil and criminal penalties, the imposition of remedial requirements and the issuance of orders enjoining future operations. Management believes that all of the Registrants' operations are in substantial compliance with current federal, state and local environmental standards. Environmental regulation can increase the cost of planning, design, initial installation and operation of OG&E's facilities. Management continues to evaluate its compliance with existing and proposed environmental legislation and regulations and implement appropriate environmental programs in a competitive market. CO 2 Emission Limits for Existing Generating Units On January 19, 2021, the U.S. Court of Appeals vacated the EPA's latest effort to adopt CO 2 emissions standards for existing coal-fired electric generating units, and the court remanded the matter to the EPA for further consideration. The EPA has indicated that administrative proceedings to respond to the U.S. Court of Appeals' remand in a new rulemaking action are ongoing but has not announced rulemaking details. The decision was based on the court's conclusion that the Clean Air Act does not require the EPA to limit the standards to measures that can be applied at and to an existing unit. On October 29, 2021, the U.S. Supreme Court granted petitions to review the decision and heard oral arguments on February 28, 2022. On June 22, 2022, the U.S. Supreme Court ruled that the approach the EPA took in the rule exceeded the powers granted by Congress and remanded greenhouse gas regulation for existing units to the EPA. With the ruling and remand by the U.S. Supreme Court, there continues to be no applicable greenhouse gas regulation for existing power plants, although a requirement for significant reduction of CO 2 emissions from existing fossil-fuel-fired power plants ultimately could result in significant additional compliance costs that would affect the Registrants' future financial position, results of operations and cash flows if such costs are not recovered through regulated rates. Other In the normal course of business, the Registrants are confronted with issues or events that may result in a contingent liability. These generally relate to lawsuits or claims made by third parties, including governmental agencies. When appropriate, management consults with legal counsel and other experts to assess the claim. If, in management's opinion, the Registrants have incurred a probable loss as set forth by GAAP, an estimate is made of the loss, and the appropriate accounting entries are reflected in the financial statements. At the present time, based on currently available information, the Registrants believe that any reasonably possible losses in excess of accrued amounts arising out of pending or threatened lawsuits or claims would not be quantitatively material to their financial statements and would not have a material adverse effect on their financial position, results of operations or cash flows.

Rate Matters and Regulation

Rate Matters and Regulation	12 Months Ended
Rate Matters and Regulation	Dec. 31, 2022
Regulated Operations [Abstract]
Rate Matters and Regulation	14. Rate Matters and Regulation Regulation and Rates OG&E's retail electric tariffs are regulated by the OCC in Oklahoma and by the APSC in Arkansas. The issuance of certain securities by OG&E is also regulated by the OCC and the APSC. OG&E's transmission activities, short-term borrowing authorization and accounting practices are subject to the jurisdiction of the FERC. The Secretary of the U.S. Department of Energy has jurisdiction over some of OG&E's facilities and operations. In 2022, 88 percent of OG&E's electric revenue was subject to the jurisdiction of the OCC, eight percent to the APSC and four percent to the FERC. The OCC and the APSC require that, among other things, (i) OGE Energy permits the OCC and the APSC access to the books and records of OGE Energy and its affiliates relating to transactions with OG&E; (ii) OGE Energy employ accounting and other procedures and controls to protect against subsidization of non-utility activities by OG&E's customers; and (iii) OGE Energy refrain from pledging OG&E assets or income for affiliate transactions. In addition, the FERC has access to the books and records of OGE Energy and its affiliates as the FERC deems relevant to costs incurred by OG&E or necessary or appropriate for the protection of utility customers with respect to the FERC jurisdictional rates. Completed Regulatory Matters APSC Proceedings Arkansas 2021 Formula Rate Plan Filing In October 2021, OG&E filed its fourth evaluation report under its Formula Rate Plan, and on February 1, 2022, OG&E, the APSC General Staff and the Office of the Arkansas Attorney General filed a non-unanimous joint settlement agreement, which included an annual electric revenue increase of $ 4.2 million. The only non-signatory to the settlement agreement agreed not to oppose the settlement. On March 4, 2022, the APSC issued a final order approving the non-unanimous settlement agreement, and new rates became effective April 1, 2022. Winter Storm Uri In February 2021, Winter Storm Uri resulted in record winter peak demand for electricity and extremely high natural gas and purchased power prices in OG&E's service territory. On April 1, 2021, OG&E filed with the APSC a motion seeking approval to defer, amortize and recover the extraordinary fuel costs over a 10 -year period with a carrying charge of OG&E's pre-tax rate of return of 6.60 percent, through a special factor within OG&E's Energy Cost Recovery Rider beginning with the first billing cycle of May 2021. On April 13, 2021, the APSC issued an order allowing OG&E interim recovery at an interest rate equal to the customer deposit interest rate over a period of 10 years beginning with the first billing cycle of May 2021, subject to true-up. On July 5, 2022, OG&E filed a motion to request recovery of the regulatory asset balance over 10 years using a weighted average cost of capital. A hearing on the merits was scheduled to be held on December 2, 2022 but was cancelled after all interested parties agreed to waive the hearing and have the APSC decide the matter based on the established record. In January 2023, the APSC issued an order approving OG&E's requested relief and authorizing OG&E to amortize the regulatory asset balance over 10 years using a pre-tax weighted average cost of capital of 6.49 percent as a carrying charge beginning March 2021. The impact of this order will be recorded beginning in the first quarter of 2023, as the order was received from the APSC in January 2023. Arkansas 2021 Formula Rate Plan Filing - Extension On May 18, 2022, the APSC issued an order granting OG&E's request for a five-year extension of the Formula Rate Plan Rider with certain terms and conditions, including continuation of OG&E's current return on equity of 9.5 percent and a change to OG&E's current debt-to-equity ratio of 50/50 percent to 55/45 percent. On June 17, 2022, OG&E filed a request for rehearing seeking reconsideration by the APSC of their decision to alter the Formula Rate Plan Rider's capital structure. On September 19, 2022, the APSC issued an order reversing its May 18, 2022 order and denying the extension of OG&E's Formula Rate Plan Rider. On September 20, 2022, the APSC Staff filed a motion for clarification for the extension denial, and OG&E, the Arkansas Attorney General and Arkansas River Valley Energy Consumers filed responses to the clarification. On September 30, 2022, the APSC issued an order clarifying that OG&E is authorized to file its 2022 and 2023 evaluation reports under the Formula Rate Plan Rider to true-up prior projected year rate adjustments. On October 28, 2022, Arkansas River Valley Energy Consumers and Walmart Inc. filed a request for rehearing of the APSC's September 30, 2022 order and asked the APSC to reverse its position and prohibit OG&E from making any further filings under its current Formula Rate Plan. On November 1, 2022, OG&E submitted its opposition to the request for rehearing. On November 28, 2022, the APSC granted the application for rehearing solely for the purpose of further consideration. On January 20, 2023, the APSC issued an order denying the request for rehearing of the September 30, 2022 order and ruling that OG&E is able to undertake two more true-up updates to its Formula Rate Plan Rider with adjustments to rates occurring in April 2023 and April 2024. Despite the denial of OG&E's extension request, the Formula Rate Plan Rider will continue until new rates are set in a future general rate review. OCC Proceedings Winter Storm Uri In December 2021, the OCC approved a settlement agreement in a final financing order authorizing the issuance of securitization bonds in an amount up to $ 760.0 million, which included estimated finance costs and was subject to change for carrying costs, any updates from the SPP settlement process and actual securitization issuance costs. On July 20, 2022, the ODFA issued the securitization bonds consistent with the OCC's order. In connection with the securitization transaction, the ODFA and OG&E entered into an agreement on July 20, 2022 whereby the ODFA purchased, and OG&E sold, the securitization property that was created pursuant to legislation enacted by the State of Oklahoma in April 2021 and the financing order received from the OCC in December 2021. Such securitization property includes the right to assess, impose, adjust, collect and receive funds, in the form of the winter event securitization charge, from OG&E's existing and future Oklahoma customers in amounts intended to be sufficient to pay the principal and interest and financing charges on the securitization bonds. On July 20, 2022, OG&E received proceeds of approximately $ 750 million for the sale of the securitization property, which represented the amount of the securitization bonds sold less the issuance costs. OG&E used these proceeds to fund the Oklahoma Winter Storm Uri regulatory asset by recovering the authorized extreme, extraordinary fuel and purchased power costs incurred during Winter Storm Uri, as well as carrying costs. Beginning August 1, 2022, OG&E acts as a servicer for collecting the funds from Oklahoma customers that are then submitted to the ODFA to repay the securitization bonds over 28 years. 2021 Oklahoma General Rate Review In December 2021, OG&E filed a general rate review in Oklahoma seeking a rate increase of $ 163.5 million and a 10.2 percent return on equity based on a common equity percentage of 53.37 percent. The rate review was based on a September 30, 2021 test year and included a request for recovery of $ 1.2 billion of capital investment since the last general rate review. OG&E had the right to implement interim rates subject to refund beginning July 1, 2022 (180 days after the filing of its application on December 30, 2021). On July 1, 2022, OG&E implemented an annual interim rate increase of $ 30.0 million, subject to refund for amounts in excess of the rates approved by the OCC. On September 8, 2022, the OCC approved a Joint Stipulation and Settlement Agreement that had been entered into by OG&E, the OCC Public Utility Division Staff, the Oklahoma Attorney General, the OG&E Shareholders Association, Oklahoma Industrial Energy Consumers and other intervenors. Non-signatory parties had agreed not to contest this agreement. Key terms of the agreement, as approved by the OCC, include, among others: • A base rate revenue increase of $ 30.0 million; • OG&E would issue a refund, over a 12-month period, for the tax expense savings arising from the reduction in the Oklahoma state corporate income tax rate from 6 percent to 4 percent for the period from January 1, 2022 through June 30, 2022, as well as amortize over five years the excess accumulated deferred income tax balance resulting from this corporate tax rate change; • There would be no change in OG&E's current return on equity of 9.5 percent, and OG&E's requested capital structure based on a common equity percentage of 53.37 percent would be approved; • OG&E would utilize depreciation rates based on the recommendations of the Oklahoma Attorney General with the exception of transmission and general plant accounts, which would be based on the depreciation rates recommended by the Oklahoma Industrial Energy Consumers; • OG&E's Grid Enhancement Plan projects recorded as of March 31, 2022 would be considered prudent and be included in base rates; • OG&E's Grid Enhancement Plan interim recovery would continue and updated terms include: (i) cost recovery through a rider mechanism will be limited to projects placed in service in 2022, 2023 and 2024, capped at a revenue requirement of $ 6.0 million for each annual investment plan and include communication, automation and technology systems projects, as well as certain weather hardening projects; and (ii) the rider mechanism will terminate by the issuance of a final order in OG&E's first general rate review following completion of projects included in the 2024 annual investment plan or no later than July 1, 2025; • OG&E would amend several of its rider tariffs to incorporate the agreements of the stipulating parties; and • Regulatory accounting treatments approved include, among other things, the establishment of a regulatory asset to defer operation and maintenance costs associated with OG&E's SAP S/4 HANA enterprise resource planning system project for consideration in future rate proceedings with the carrying cost accruing at OG&E's short-term cost of debt, the amortization of COVID-19 regulatory asset balance over five years and the amortization of over/under-recovery balance of the pension tracker over 15 years, which is a change from the previous five-year recovery period. Due to the September 8, 2022 OCC approval of the rate increase of $ 30.0 million, no refund of interim rates was necessary. Pending Regulatory Matters Various proceedings pending before state or federal regulatory agencies are described below. Unless stated otherwise, the Registrants cannot predict when the regulatory agency will act or what action the regulatory agency will take. The Registrants' financial results are dependent in part on timely and constructive decisions by the regulatory agencies that set OG&E's rates. FERC Proceedings Order for Sponsored Transmission Upgrades within SPP Under Attachment Z2 of the SPP Open Access Transmission Tariff, costs of participant-funded, or "sponsored," transmission upgrades may be recovered from other SPP customers whose transmission service depends on capacity enabled by the upgrade. The SPP Tariff required the SPP to charge for these upgrades beginning in 2008, but the SPP did not begin charging its customers for these upgrades until 2016 due to information system limitations. At that time, the SPP sought a waiver of a time limitation in its tariff that otherwise would have prevented it from waiting until 2016 to bill for the 2008 through 2015 period. The FERC granted the waiver, and the SPP then billed OG&E as a user for these Z2 charges while simultaneously crediting OG&E as a sponsor of Z2 transmission upgrades, resulting in OG&E being a net recipient of sponsored upgrade credits. The majority of these net credits were refunded to customers through OG&E's various rate riders that include SPP activity with the remaining amounts retained by OG&E. Several companies that were net payers of Z2 charges sought rehearing of the FERC's 2016 order approving the waiver and then appealed it. While that appeal was pending, the FERC obtained a remand and then reversed itself and ruled that the SPP tariff provision that prohibited the 2008 through 2015 charges could not be waived. It ordered the SPP to develop a plan to refund the payments but not to implement the refunds until further ordered to do so. In response, in April 2019, OG&E filed a request for rehearing at the FERC. The next month, it also filed a Complaint at the FERC against the SPP contending that the SPP and not OG&E should bear the cost of any refunds resulting from the SPP's tariff violation and that SPP’s actions also violated its contracts with OG&E. In February 2020, the FERC denied OG&E's request for rehearing but did not consider SPP's refund plan. No date for payment of refunds was established. In August 2021, the U.S. Court of Appeals for the District of Columbia Circuit denied OG&E's petition for review of the FERC's order denying the waiver and requiring refunds. After denying rehearing of its ruling, the court of appeals returned the matter in November 2021 to the FERC for further proceedings in accordance with its opinion. The FERC has not acted on that remand. If the FERC proceeds to order refunds in full, OG&E estimates it would be required to refund $ 13.0 million, which is net of amounts paid to other utilities for upgrades and would be subject to interest at the FERC-approved rate. The SPP has stated in filings with the FERC both before and after the court of appeals decision that there are considerable complexities in implementing the refunds that will have to be resolved before they can be paid. Payment of refunds would shift recovery of these upgrade credits to future periods. The SPP filed a report on January 4, 2022 confirming that administering refunds would be complex and could take years unless the SPP is allowed to make certain simplifying assumptions. The SPP also urged that all pending complaint proceedings, including OG&E's complaint and three similar complaints against the SPP, be resolved before any refund process is ordered to begin. OG&E and other parties filed responses to the SPP report, and the matter remains pending at the FERC. Of the $ 13.0 million, the Registrants would be impacted by $ 5.0 million in expense that initially benefited the Registrants in 2016, and OG&E customers would incur a net impact of $ 8.0 million in expense through rider mechanisms or the FERC formula rate. As of December 31, 2022, the Registrants have reserved $ 13.0 million plus estimated interest for a potential refund. In November 2022, the FERC issued an order denying OG&E's complaint against SPP. It also issued orders granting the other three complaints against the SPP in part but awarded no relief. All four complainants timely sought rehearing of these orders. Those rehearing petitions remain pending, though OG&E and the other complainants can appeal them now if they choose to do so on the basis that they have been deemed denied by operation of law. The FERC, however, can continue to consider the rehearings on the merits, and the complainants will be able appeal any denial on the merits as well. In June 2020, the FERC approved, effective July 1, 2020, an SPP proposal to eliminate Attachment Z2 revenue crediting and replace it with a different rate mechanism that would provide project sponsors, such as OG&E, the same level of recovery. This elimination of the Attachment Z2 revenue crediting would only prospectively impact OG&E and its recovery of any future upgrade costs that it may incur as a project sponsor subsequent to July 2020. All of the existing projects that are eligible to receive revenue credits under Attachment Z2 will remain eligible, which includes the $ 13.0 million that is at issue in the remand from OG&E's appeal and in OG&E's complaint proceeding. Incentive Adders for Transmission Rates The FERC issued a NOPR in March 2020, and issued a supplemental NOPR in April 2021, proposing to update its transmission incentives policy. Among other things, the NOPR proposes (i) the current 50-basis point return on equity adder for RTO/ISO participation would be applicable only to transmitting utilities that join an RTO/ISO, and this incentive would only apply for the first three years in which the utility is an RTO/ISO member and (ii) transmitting utilities that have been members of an RTO/ISO for three years or more, such as OG&E, would be required to make a compliance filing to remove the existing return on equity adder from their rates. Currently, there is no specific deadline for the FERC to take further action, and it is unknown whether the FERC will address the RTO participation adder individually or as part of a larger order on transmission incentives. APSC Proceedings Arkansas 2022 Formula Rate Plan Filing On October 3, 2022, OG&E filed its fifth evaluation report under its Formula Rate Plan, including a request to increase its Arkansas retail revenues by $ 8.5 million, which reflects a cap of 4.0 percent of annualized filing year revenues as of June 2022. After utilizing an adjustment to annualized filing year revenues as of October 2022, the capped revenue requirement increase rose to approximately $ 9.6 million. On December 29, 2022, intervening parties filed errors and objections to OG&E's fifth evaluation report. The Arkansas Attorney General made no recommended adjustments to the revenue requirement, and the Arkansas Valley Electric Consumers reiterated legal arguments about the legal permissibility of the fifth evaluation report. The APSC Staff made certain minor adjustments but agreed that the overall revenue requirement adjustment should reflect the capped amount of $ 9.6 million. O n February 1, 2023, OG&E and the APSC Staff filed a non-unanimous joint settlement agreement, which includes an annual electric revenue increase of $ 9.6 million. The Arkansas Attorney General and the Arkansas Valley Electric Consumers have agreed not to oppose the settlement, and the settlement agreement is subject to approval by the APSC. OG&E and the APSC Staff have requested a final order from the APSC by early March 2023, with new rates to be effective April 1, 2023. Prudence Review - Winter Storm Uri Extraordinary Costs On February 2, 2023, the APSC issued an order to initiate proceedings to address the prudence and appropriate allocation of the extraordinary costs incurred by Arkansas jurisdictional electric and natural gas utilities during Winter Storm Uri. As discussed above, in January 2023, the APSC issued an order approving OG&E's recovery of the Winter Storm Uri regulatory asset balance, which included setting the carrying charges and term of recovery. The APSC did not rule on prudence or cost allocation at that time. OG&E's direct testimony is due in April 2024, and a hearing on the merits is expected to begin in August 2024. OCC Proceedings Oklahoma Retail Electric Supplier Certified Territory Act Causes Several rural electric cooperative electricity suppliers have filed complaints with the OCC alleging that OG&E has violated the Oklahoma Retail Electric Supplier Certified Territory Act. OG&E believes it is lawfully serving customers specifically exempted from this act and has presented evidence and testimony to the OCC supporting its position. There have been five complaint cases initiated at the OCC, and the OCC has issued decisions on each of them. The OCC ruled in favor of the electric cooperatives in three of those cases and ruled in favor of OG&E in two of those cases. All five of those cases have been appealed to the Oklahoma Supreme Court, where they have been made companion cases but will be individually briefed and have individual final decisions. If the Oklahoma Supreme Court ultimately were to find that some or all of the customers being served are not exempted from the Oklahoma Retail Electric Supplier Certified Territory Act, OG&E would have to evaluate the recoverability of some plant investments made to serve these customers. The total amount of OG&E's plant investments made to serve the customers in all five cases is approximately $ 28.0 million , of which $ 11.7 million applies to the three cases where the OCC ruled in favor of the electric cooperatives. In addition to the evaluation of the recoverability of the investments, OG&E may also be required to reimburse certified territory suppliers for an amount of lost revenue. The amount of such lost revenue would depend on how the OCC calculates the revenue requirement but could range from approximately $ 16.2 million to $ 63.9 million for all five cases, of which $ 4.4 million to $ 7.9 million would apply to the three cases where the OCC ruled in favor of the electric cooperatives. 2021 Oklahoma Fuel Prudency On July 1, 2022, the OCC Public Utility Division Staff filed their application initiating the review of the 2021 fuel adjustment clause and prudence review. On February 21, 2023, a Joint Stipulation and Settlement Agreement was filed, and OG&E filed its testimony in support of such agreement. The stipulating parties, which include the OCC Public Utility Division Staff and the Oklahoma Attorney General, agree that: (i) OG&E's practices, policies and judgment for fuel procurement during 2021 were prudent; (ii) OG&E's power purchase costs and expenses, monthly fuel filings and processes and fuel-related investments and decisions for 2021 were fair, just and reasonable and (iii) OG&E exercised prudent judgement pertaining to all such matters and that the electric generation, purchased power and fuel procurement expenses were prudently incurred. Further, the stipulating parties agree to certain revisions of the fuel clause adjustment tariff, including a revised semi-annual fuel clause adjustment factor redetermination process which will be subject to the OCC Public Utility Division approval or denial. A hearing on the merits for the Joint Stipulation and Settlement Agreement is scheduled for February 23, 2023. Fuel Cost Adjustment Show Cause On September 29, 2022, the OCC Public Utility Division Staff initiated a cause to determine the appropriate methodology to recover OG&E's fuel clause under recovery balance of $ 424.0 million and how OG&E's fuel factors should be set going forward. The Staff requested that OG&E explain how it arrived at the noted under recovery balance, explain its fuel forecasting process, justify its amortization period of 24 months and explain the adequacy of its resource mix and fuel supply plans. Updated fuel factors were implemented by OG&E on October 1, 2022 to recover the balance from customers over 24 months. The OCC Public Utility Division Staff did not oppose OG&E's implementation of updated fuel factors on an interim basis and subject to refund. A hearing on the merits was held on November 3 and 4, 2022. Despite several public deliberations, the OCC has not issued a final order in this proceeding. On January 1, 2023, OG&E implemented its annual redetermination of its fuel factors, without further action or opposition from the OCC. SPP Proceedings Planning Reserve Margin and Performance Based Accreditation On July 26, 2022, the SPP Board of Directors approved a planning reserve margin increase from 12 percent to 15 percent that each load serving entity, such as OG&E, must maintain. This change will be effective for the summer of 2023. At the same time, the SPP Board of Directors also approved a new unit accreditation methodology for conventional generation, effective 2024. As a result, OG&E is currently evaluating its plan to fill the incremental capacity needs brought about by these policy changes.

Schedule II

Schedule II	12 Months Ended
Schedule II	Dec. 31, 2022
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure	SCHEDULE II - Valuation and Qualifying Accounts Additions Description Balance at Beginning of Period Charged to Costs and Expenses Deductions (A) Balance at End of Period (In millions) Balance at December 31, 2020 Reserve for Uncollectible Accounts $ 1.5 $ 3.0 $ 1.9 $ 2.6 Balance at December 31, 2021 Reserve for Uncollectible Accounts $ 2.6 $ 3.2 $ 3.4 $ 2.4 Balance at December 31, 2022 Reserve for Uncollectible Accounts $ 2.4 $ 2.8 $ 3.3 $ 1.9 (A) Uncollectible accounts receivable written off, net of recoveries.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization OGE Energy is a holding company with investments in energy and energy services providers offering physical delivery and related services for electricity in Oklahoma and western Arkansas. Prior to September 30, 2022, OGE Energy also held investments in Enable and Energy Transfer, which offered natural gas, crude oil and NGL services. OGE Energy reports these activities through two business segments: (i) electric company and (ii) natural gas midstream operations. The accounts of OGE Energy and its wholly-owned subsidiaries, including OG&E, are included in OGE Energy's consolidated financial statements. All intercompany transactions and balances are eliminated in such consolidation. For periods prior to the December 2, 2021 closing of the Enable and Energy Transfer merger, OGE Energy accounted for its investment in Enable as an equity method investment and reported it within OGE Energy's natural gas midstream operations segment. For the period of December 2, 2021 through September 30, 2022, OGE Energy accounted for its investment in the Energy Transfer units it acquired in the merger as an investment in equity securities, as further discussed below. As of the end of September 2022, OGE Energy had sold all of its Energy Transfer limited partner units, becoming primarily an electric company. Electric Company Operations . OGE Energy's electric company operations are conducted through OG&E, which generates, transmits, distributes and sells electric energy in Oklahoma and western Arkansas. OG&E's rates are subject to regulation by the OCC, the APSC and the FERC. OG&E was incorporated in 1902 under the laws of the Oklahoma Territory and is a wholly-owned subsidiary of OGE Energy. OG&E is the largest electric company in Oklahoma, and its franchised service territory includes Fort Smith, Arkansas and the surrounding communities. OG&E sold its retail natural gas business in 1928 and is no longer engaged in the natural gas distribution business. Natural Gas Midstream Operations. For the period of December 2, 2021 to September 30, 2022, OGE Energy's natural gas midstream operations segment included OGE Energy's investment in Energy Transfer's equity securities acquired in the Enable/Energy Transfer merger. For the year ended December 31, 2022, this segment also includes legacy Enable seconded employee pension and postretirement costs. Prior to OGE Energy's sale of all Energy Transfer limited partner units, the investment in Energy Transfer's equity securities was held through wholly-owned subsidiaries and ultimately OGE Holdings. OGE Energy accounted for its investment in Energy Transfer as an investment in equity securities, as further discussed under "Investment in Equity Securities of Energy Transfer" below.
Accounting Records	Accounting Records The accounting records of OG&E are maintained in accordance with the Uniform System of Accounts prescribed by the FERC and adopted by the OCC and the APSC. Additionally, OG&E, as a regulated utility, is subject to accounting principles for certain types of rate-regulated activities, which provide that certain incurred costs that would otherwise be charged to expense can be deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense can be deferred as regulatory liabilities, based on the expected flowback to customers in future rates. Management's expected recovery of deferred costs and flowback of deferred credits generally results from specific decisions by regulators granting such ratemaking treatment. OG&E records certain incurred costs and obligations as regulatory assets or liabilities if, based on regulatory orders or other available evidence, it is probable that the costs or obligations will be included in amounts allowable for recovery or refund in future rates. The following table presents a summary of OG&E's regulatory assets and liabilities. December 31 (In millions) 2022 2021 REGULATORY ASSETS Current: Oklahoma fuel clause under recoveries $ 474.3 $ 140.4 Arkansas fuel clause under recoveries 40.6 11.5 Oklahoma Energy Efficiency Rider under recoveries (A) 7.7 11.7 Other (A) 4.7 19.0 Total current regulatory assets $ 527.3 $ 182.6 Non-current: Oklahoma deferred storm expenses $ 206.3 $ 172.8 Benefit obligations regulatory asset 119.7 109.2 Arkansas Winter Storm Uri costs 78.2 88.9 Pension tracker 57.2 42.9 Sooner Dry Scrubbers 18.1 18.9 Arkansas deferred pension expenses 12.3 12.1 Unamortized loss on reacquired debt 8.0 8.9 COVID-19 impacts 7.7 8.2 Frontier Plant deferred expenses 5.2 6.7 Oklahoma Winter Storm Uri costs — 747.9 Other 11.6 14.3 Total non-current regulatory assets $ 524.3 $ 1,230.8 REGULATORY LIABILITIES Current: SPP cost tracker over recovery (B) $ 3.0 $ — Other (B) 2.5 2.5 Total current regulatory liabilities $ 5.5 $ 2.5 Non-current: Income taxes refundable to customers, net $ 894.7 $ 930.7 Accrued removal obligations, net 250.5 296.8 Other 1.9 3.6 Total non-current regulatory liabilities $ 1,147.1 $ 1,231.1 (A) Included in Other Current Assets in the balance sheets. (B) Included in Other Current Liabilities in the balance sheets. Fuel clause under and over recoveries are generated from OG&E's customers when OG&E's cost of fuel either exceeds or is less than the amount billed to its customers, respectively. OG&E's fuel recovery clauses are designed to smooth the impact of fuel price volatility on customers' bills. As a result, OG&E under recovers fuel costs in periods of rising fuel prices above the baseline charge for fuel and over recovers fuel costs when prices decline below the baseline charge for fuel. Provisions in the fuel clauses are intended to allow OG&E to amortize under and over recovery balances. OG&E recovers program costs related to the Energy Efficiency Program in Oklahoma through the Energy Efficiency Rider, which operates on a three-year program cycle. The current program cycle, which runs through 2024, includes recovery of (i) energy efficiency program costs, (ii) lost revenues associated with certain achieved energy efficiency and demand savings, (iii) performance-based incentives and (iv) costs associated with research and development investments. OG&E includes in expense any Oklahoma storm-related operation and maintenance expenses up to $ 2.7 million annually and defers to a regulatory asset any additional expenses incurred over $ 2.7 million. OG&E typically recovers the amounts deferred each year over a five to ten year period in accordance with historical practice. The benefit obligations regulatory asset is comprised of expenses recorded which are probable of future recovery and that have not yet been recognized as components of net periodic benefit cost, including net loss and prior service cost. These expenses are recorded as a regulatory asset as OG&E historically has recovered and currently recovers pension and postretirement benefit plan expense in its electric rates. If, in the future, the regulatory bodies indicate a change in policy related to the recovery of pension and postretirement benefit plan expenses, this could cause the benefit obligations regulatory asset balance to be reclassified to accumulated other comprehensive income. The following table presents a summary of the components of the benefit obligations regulatory asset. December 31 (In millions) 2022 2021 Pension Plan and Restoration of Retirement Income Plan: Net loss $ 110.0 $ 89.6 Postretirement Benefit Plans: Net loss 9.7 23.2 Prior service cost — ( 3.6 ) Total $ 119.7 $ 109.2 In February 2021, Winter Storm Uri resulted in record winter peak demand for electricity and extremely high natural gas and purchased power prices in OG&E's service territory. The OCC allowed OG&E to create a regulatory asset for the Oklahoma portion of all deferred costs, and the Oklahoma Winter Storm Uri regulatory asset was fully recovered in July 2022 through OG&E's receipt of securitization funds from the ODFA, as further discussed in Note 14. In 2021, the APSC allowed OG&E to create a regulatory asset for the Arkansas portion of all deferred costs and, as ordered in January 2023, to amortize the regulatory asset balance over 10 years using a weighted average cost of capital as a carrying charge, as further discussed in Note 14. OG&E recovers specific amounts of pension and postretirement medical costs in rates approved in its Oklahoma rate reviews. In accordance with approved orders, OG&E defers the difference between actual pension and postretirement medical expenses and the amount approved in its last Oklahoma rate review as a regulatory asset or regulatory liability. These amounts have been recorded in the Pension tracker regulatory asset in the table above. As discussed in Note 14, the OCC recently approved recovery of the over/under-recovery balance of the Pension tracker over 15 years, which is a change from the previous five-year recovery period. As approved by the OCC, OG&E deferred the non-fuel incremental operation and maintenance expenses, depreciation, debt cost associated with the capital investment and related ad valorem taxes for the Dry Scrubbers at Sooner Units 1 and 2 as a regulatory asset, and these costs are being recovered over 25 years. Arkansas includes a certain level of pension expense in base rates. When the Pension Plan experiences a settlement, which represents an acceleration of future pension costs, OG&E defers to a regulatory asset the Arkansas jurisdictional portion of each settlement, which historically has been recovered from customers over the average life of the remaining plan participants. A portion of these settlements is being recovered in current rates, and recovery of additional amounts will be requested as additional settlements occur. For additional information related to settlements, see Note 11. Unamortized loss on reacquired debt is comprised of unamortized debt issuance costs related to the early retirement of OG&E's long-term debt. These amounts are recorded in interest expense and are being amortized over the term of the long-term debt which replaced the previous long-term debt. The unamortized loss on reacquired debt is recovered as a part of OG&E's cost of capital. In response to the COVID-19 pandemic, the OCC and APSC issued orders allowing OG&E to defer certain expenses related to its COVID-19 response, such as incremental expenses that were related to the suspension of or delay in disconnection of service and additional expenses associated with ensuring the continuity of electric utility service. As discussed in Note 14, the OCC approved recovery of these costs over five years in OG&E's most recent Oklahoma general rate review. OG&E deferred to a regulatory asset the Oklahoma jurisdictional portion of costs, including non-fuel operation and maintenance expenses, depreciation, taxes other than income taxes and a return on capital, for its investment in the Frontier plant. The OCC approved recovery of these costs within base rates through the Oklahoma general rate review order received in September 2022. OG&E recovers certain SPP costs related to base plan charges from its customers and refunds certain SPP revenues received to its customers in Oklahoma through the SPP cost tracker and in Arkansas through the transmission cost recovery rider. Income taxes refundable to customers, net, primarily represents the reduction in accumulated deferred income taxes that resulted from the reduction in the federal income tax rate as part of the Tax Cuts and Jobs Act of 2017 as well as other state tax rate changes, partially offset by income taxes recoverable from customers primarily related to the equity component of the allowance for funds used during construction. These net liabilities will be returned to customers in varying amounts over approximately 80 years, and the assets will be amortized over the estimated remaining life of the assets to which they relate, as the temporary differences that generated the income tax benefits turn-around. Accrued removal obligations, net represents asset retirement costs previously recovered from ratepayers for other than legal obligations. Management continuously monitors the future recoverability of regulatory assets. When in management's judgment future recovery becomes impaired, the amount of the regulatory asset is adjusted, as appropriate. If OG&E were required to discontinue the application of accounting principles for certain types of rate-regulated activities for some or all of its operations, it could result in writing off the related regulatory assets or liabilities, which could have significant financial effects.
Use of Estimates	Use of Estimates In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Changes to these assumptions and estimates could have a material effect on the Registrants' financial statements. However, the Registrants believe they have taken reasonable positions where assumptions and estimates are used in order to minimize the negative financial impact to the Registrants that could result if actual results vary from the assumptions and estimates. In management's opinion, the areas where the most significant judgment is exercised include the determination of pension and postretirement plan assumptions, income taxes, contingency reserves, asset retirement obligations, regulatory assets and liabilities, unbilled revenues and the allowance for uncollectible accounts receivable.
Cash and Cash Equivalents	Cash and Cash Equivalents For purposes of the financial statements, the Registrants consider all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. These investments are carried at cost, which approximates fair value.
Allowance for Uncollectible Accounts Receivable	Allowance for Uncollectible Accounts Receivable Customer balances are generally written off if not collected within six months after the final billing date. The allowance for uncollectible accounts receivable for OG&E is generally calculated by multiplying the last six months of electric revenue by the provision rate, which is based on a 12-month historical average of actual balances written off and is adjusted for current conditions and supportable forecasts as necessary. To the extent the historical collection rates, when incorporating forecasted conditions, are not representative of future collections, there could be an effect on the amount of uncollectible expense recognized. Also, a portion of the uncollectible provision related to fuel within the Oklahoma jurisdiction is being recovered through the fuel adjustment clause. The allowance for uncollectible accounts receivable is a reduction to Accounts Receivable in the balance sheets and is included in Other Operation and Maintenance Expense in the statements of income. The allowance for uncollectible accounts receivable was $ 1.9 million and $ 2.4 million at December 31, 2022 and 2021, respectively. New business customers are required to provide a security deposit in the form of cash, bond or irrevocable letter of credit that is refunded when the account is closed. New residential customers whose outside credit scores indicate an elevated risk are required to provide a security deposit that is refunded based on customer protection rules defined by the OCC and the APSC. The payment behavior of all existing customers is continuously monitored, and, if the payment behavior indicates sufficient risk within the meaning of the applicable utility regulation, customers will be required to provide a security deposit.
Fuel Inventories	Fuel Inventories Fuel inventories for the generation of electricity consist of coal, natural gas, oil and alternative fuel. OG&E uses the weighted-average cost method of accounting for inventory that is physically added to or withdrawn from storage or stockpiles. The amount of fuel inventory was $ 108.8 million and $ 40.6 million at December 31, 2022 and 2021 , respectively.
Property, Plant and Equipment	Property, Plant and Equipment All property, plant and equipment is recorded at cost. Newly constructed plant is added to plant balances at cost which includes contracted services, direct labor, materials, overhead, transportation costs and the allowance for funds used during construction. Replacements of units of property are capitalized as plant. For assets that belong to a common plant account, the replaced plant is removed from plant balances, and the cost of such property net of any salvage proceeds is charged to Accumulated Depreciation. For assets that do not belong to a common plant account, the replaced plant is removed from plant balances with the related accumulated depreciation, and the remaining balance net of any salvage proceeds is recorded as a loss in the statements of income as Other Expense. Repair and replacement of minor items of property are included in the statements of income as Other Operation and Maintenance Expense. The following tables present OG&E's ownership interest in the jointly-owned McClain Plant and the jointly-owned Redbud Plant, and, as disclosed below, only OG&E's ownership interest is reflected in the property, plant and equipment and accumulated depreciation balances in these tables. The owners of the remaining interests in the McClain Plant and the Redbud Plant are responsible for providing their own financing of capital expenditures. Also, only OG&E's proportionate interests of any direct expenses of the McClain Plant and the Redbud Plant, such as fuel, maintenance expense and other operating expenses, are included in the applicable financial statement captions in the statements of income. December 31, 2022 (In millions) Percentage Ownership Total Property, Plant and Equipment Accumulated Depreciation Net Property, Plant and Equipment McClain Plant (A) 77 % $ 261.9 $ 119.4 $ 142.5 Redbud Plant (A)(B) 51 % $ 542.1 $ 225.2 $ 316.9 (A) Construction work in progress was $ 0.7 million and $ 1.5 million for the McClain and Redbud Plants, respectively. (B) This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 78.2 million. December 31, 2021 (In millions) Percentage Ownership Total Property, Plant and Equipment Accumulated Depreciation Net Property, Plant and Equipment McClain Plant (A) 77 % $ 258.5 $ 109.0 $ 149.5 Redbud Plant (A)(B) 51 % $ 538.2 $ 203.4 $ 334.8 (A) Construction work in progress was $ 0.2 million and $0.2 million for the McClain and Redbud Plants, respectively. (B) This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 72.8 million. The following tables present the Registrants' major classes of property, plant and equipment and related accumulated depreciation. December 31, 2022 (In millions) Total Property, Plant and Equipment Accumulated Depreciation Net Property, Plant and Equipment OG&E: Distribution assets $ 5,781.3 $ 1,527.1 $ 4,254.2 Electric generation assets (A) 5,188.1 1,982.7 3,205.4 Transmission assets (B) 3,180.5 667.9 2,512.6 Intangible plant 384.0 193.6 190.4 Other property and equipment 591.3 213.2 378.1 OG&E property, plant and equipment 15,125.2 4,584.5 10,540.7 Non-OG&E property, plant and equipment 6.1 — 6.1 Total OGE Energy property, plant and equipment $ 15,131.3 $ 4,584.5 $ 10,546.8 (A) This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 78.3 million. (B) This amount includes a plant acquisition adjustment of $ 3.3 million and accumulated amortization of $ 1.0 million. December 31, 2021 (In millions) Total Property, Plant and Equipment Accumulated Depreciation Net Property, Plant and Equipment OG&E: Distribution assets $ 5,225.8 $ 1,477.5 $ 3,748.3 Electric generation assets (A) 5,037.9 1,839.0 3,198.9 Transmission assets (B) 3,038.2 627.0 2,411.2 Intangible plant 301.1 171.7 129.4 Other property and equipment 542.7 203.7 339.0 OG&E property, plant and equipment 14,145.7 4,318.9 9,826.8 Non-OG&E property, plant and equipment 6.1 — 6.1 Total OGE Energy property, plant and equipment $ 14,151.8 $ 4,318.9 $ 9,832.9 (A) This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 72.8 million. (B) This amount includes a plant acquisition adjustment of $ 3.3 million and accumulated amortization of $ 0.9 million. OG&E's unamortized computer software costs, included in intangible plant above, were $ 143.2 million and $ 103.7 million at December 31, 2022 and 2021 , respectively. OG&E's amortization expense for computer software costs was $ 23.5 million, $ 18.1 million and $ 14.9 million for the years ended December 31, 2022, 2021 and 2020 , respectively.
Depreciation and Amortization	Depreciation and Amortization The provision for depreciation, which was 2.7 percent and 2.6 percent of the average depreciable utility plant for 2022 and 2021, respectively, is calculated using the straight-line method over the estimated service life of the utility assets. Depreciation is provided at the unit level for production plant and at the account or sub-account level for all other plant and is based on the average life group method. In 2023 , the provision for depreciation is projected to be 2.7 percent of the average depreciable utility plant. Amortization of intangible assets is calculated using the straight-line method. Of the remaining amortizable intangible plant balance at December 31, 2022 , 43.1 percent will be amortized over 6.7 years, 56.3 percent will be amortized over 13.8 years and the remaining 0.6 percent will be amortized over 22.4 years. Amortization of plant acquisition adjustments is provided on a straight-line basis over the estimated remaining service life of the acquired assets. Plant acquisition adjustments include $ 148.3 million for the Redbud Plant, which is being amortized over a 27 - year life, and $ 3.3 million for certain transmission substation facilities in OG&E's service territory, which is being amortized over a 37 to 59 -year period.
Asset Retirement Obligations	Asset Retirement Obligations OG&E has asset retirement obligations primarily associated with the removal of company-owned wind turbines on leased land, as well as the removal of asbestos from certain power generating stations. OG&E has recorded asset retirement obligations that are being accreted over their respective lives ranging from five to 68 years . Asset retirement obligations are included in Other Deferred Credits in the Registrants' balance sheets. The following table presents changes to OG&E's asset retirement obligations during the years ended December 31, 2022 and 2021. (In millions) 2022 2021 Balance at January 1 $ 80.2 $ 79.6 Accretion expense 0.6 0.6 Liabilities settled ( 2.5 ) — Balance at December 31 $ 78.3 $ 80.2
Environmental Costs	Accruals for environmental costs are recognized when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated. Costs are charged to expense or deferred as a regulatory asset based on expected recovery from customers in future rates, if they relate to the remediation of conditions caused by past operations or if they are not expected to mitigate or prevent contamination from future operations. Where environmental expenditures relate to facilities currently in use, such as pollution control equipment, the costs may be capitalized and depreciated over the future service periods. Estimated remediation costs are recorded at undiscounted amounts, independent of any insurance or rate recovery, based on prior experience, assessments and current technology. Accrued obligations are regularly adjusted as environmental assessments and estimates are revised and remediation efforts proceed. For sites where OG&E has been designated as one of several potentially responsible parties, the amount accrued represents OG&E's estimated share of the cost. OG&E had $ 24.2 million and $ 25.8 million in accrued environmental liabilities at December 31, 2022 and 2021 , respectively, which are included in OG&E's asset retirement obligation s.
Allowance for Funds Used During Construction	Allowance for Funds Used During Construction Allowance for funds used during construction, a non-cash item, is reflected as an increase to Net Other Income and a reduction to Interest Expense in the statements of income and as an increase to Construction Work in Progress in the balance sheets. Allowance for funds used during construction is calculated according to the FERC requirements for the imputed cost of equity and borrowed funds. Allowance for funds used during construction rates, compounded semi-annually, were 4.8 percent, 7.4 percent and 7.3 percent for the years ended December 31, 2022, 2021 and 2020 , respectively.
Collection of Sales Tax	Collection of Sales Tax In the normal course of its operations, OG&E collects sales tax from its customers. OG&E records a current liability for sales taxes when it bills its customers and eliminates this liability when the taxes are remitted to the appropriate governmental authorities. OG&E excludes the sales tax collected from its operating revenues.
Revenue Recognition	Revenue Recognition General OG&E recognizes revenue from electric sales when power is delivered to customers. The performance obligation to deliver electricity is generally created and satisfied simultaneously, and the provisions of the regulatory-approved tariff determine the charges OG&E may bill the customer, payment due date and other pertinent rights and obligations of both parties. OG&E measures its customers' metered usage and sends bills to its customers throughout each month. As a result, there is a significant amount of customers' electricity consumption that has not been billed at the end of each month. OG&E accrues an estimate of the revenues for electric sales delivered since the latest billings. Unbilled revenue is presented in Accrued Unbilled Revenues in the balance sheets and in Revenues from Contracts with Customers in the statements of income based on estimates of usage and prices during the period. The estimates that management uses in this calculation could vary from the actual amounts to be paid by customers. Integrated Market and Transmission OG&E currently owns and operates transmission and generation facilities as part of a vertically integrated utility. OG&E is a member of the SPP regional transmission organization and has transferred operational authority, but not ownership, of OG&E's transmission facilities to the SPP. The SPP has implemented FERC-approved regional day-ahead and real-time markets for energy and operating services, as well as associated transmission congestion rights. Collectively, the three markets operate together under the global name, SPP Integrated Marketplace. OG&E represents owned and contracted generation assets and customer load in the SPP Integrated Marketplace for the sole benefit of its customers. OG&E has not participated in the SPP Integrated Marketplace for any speculative trading activities. OG&E records the SPP Integrated Marketplace transactions as sales or purchases per FERC Order 668, which requires that purchases and sales be recorded on a net basis for each settlement period of the SPP Integrated Marketplace. Purchases and sales are based on the fixed transaction price determined by the market at the time of the purchase or sale and the MWh quantity purchased or sold. These results are reported as Revenues from Contracts with Customers or Fuel, Purchased Power and Direct Transmission Expense in the statements of income. OG&E's revenues, expenses, assets and liabilities may be adversely affected by changes in the organization, operating and regulation by the FERC or the SPP. OG&E's transmission revenues are generated by the use of OG&E's transmission network by the SPP, which operates the network, on behalf of other transmission owners. OG&E recognizes revenue on the sale of transmission service to its customers over time as the service is provided in the amount OG&E has a right to invoice. Transmission service to the SPP is billed monthly based on a fixed transaction price determined by OG&E's FERC-approved formula transmission rates along with other SPP-specific charges and the megawatt quantity reserved. Other Revenues Other Revenues in the statements of income is comprised of certain rider revenue that includes alternative revenue measures as defined in ASC 980, "Regulated Operations," which details two types of alternative revenue programs. The first type adjusts billings for the effects of weather abnormalities or broad external factors or to compensate OG&E for demand-side management initiatives (i.e., no-growth plans and similar conservation efforts). The second type provides for additional billings (i.e., incentive awards) for the achievement of certain objectives, such as reducing costs, reaching specified milestones or demonstratively improving customer service. Once the specific events permitting billing of the additional revenues under either program type have been completed, OG&E recognizes the additional revenues if (i) the program is established by an order from OG&E's regulatory commission that allows for automatic adjustment of future rates; (ii) the amount of additional revenues for the period is objectively determinable and is probable of recovery; and (iii) the additional revenues will be collected within 24 months following the end of the annual period in which they are recognized.
Fuel Adjustment Clauses	Fuel Adjustment Clauses The actual cost of fuel used in electric generation and certain purchased power costs are generally recoverable from OG&E's customers through fuel adjustment clauses. The fuel adjustment clauses are subject to periodic review by the OCC and the APSC.
Leases	Leases The Registrants evaluate all contracts under ASC 842 to determine if the contract is or contains a lease and to determine classification as an operating or finance lease. If a lease is identified, the Registrants recognize a right-of-use asset and a lease liability in their balance sheets. The Registrants recognize and measure a lease liability when they conclude the contract contains an identified asset that the Registrants control through having the right to obtain substantially all of the economic benefits and the right to direct the use of the identified asset. The liability is equal to the present value of lease payments, and the asset is based on the liability, subject to adjustment, such as for initial direct costs. Further, the Registrants utilize an incremental borrowing rate for purposes of measuring lease liabilities, if the discount rate is not implicit in the lease. To calculate the incremental borrowing rate, the Registrants start with a current pricing report for their senior unsecured notes, which indicates rates for periods reflective of the lease term, and adjust for the effects of collateral to arrive at the secured incremental borrowing rate. As permitted by ASC 842, the Registrants made an accounting policy election to not apply the balance sheet recognition requirements to short-term leases and to not separate lease components from non-lease components when recognizing and measuring lease liabilities. For income statement purposes, the Registrants record operating lease expense on a straight-line basis.
Income Taxes	Income Taxes OGE Energy files consolidated income tax returns in the U.S. federal jurisdiction and various state jurisdictions. OG&E is a part of the consolidated tax return of OGE Energy. Income taxes are generally allocated to each company in the affiliated group, including OG&E, based on its stand-alone taxable income or loss. Federal investment tax credits previously claimed on electric company property have been deferred and will be amortized to income over the life of the related property. The Registrants use the asset and liability method of accounting for income taxes. Under this method, a deferred tax asset or liability is recognized for the estimated future tax effects attributable to temporary differences between the financial statement basis and the tax basis of assets and liabilities as well as tax credit carry forwards and net operating loss carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period of the change. The Registrants recog nize interest related to unrecognized tax benefits in Interest Expense and recognize penalties in Other Expense in the statements of income. Deferred tax assets are evaluated for future realization and reduced by a valuation allowance to the extent the Registrants believe they will not be realized.
Accrued Vacation	Accrued Vacation The Registrants accrue vacation pay monthly by establishing a liability for vacation earned. Vacation may be taken as earned and is charged against the liability. At the end of each year, the liability represents the amount of vacation earned but not taken.
Related Party Transactions	Related Party Transactions OGE Energy charges operating costs to OG&E based on several factors, and operating costs directly related to OG&E are assigned as such. Operating costs incurred for the benefit of OG&E are allocated either as overhead based primarily on labor costs or using the "Distrigas" method, which is a three-factor formula that uses an equal weighting of payroll, net operating revenues and gross property, plant and equipment. OGE Energy adopted this method as a result of a recommendation by the OCC Staff. OGE Energy believes this method provides a reasonable basis for allocating common expenses. OGE Energy charged operating costs to OG&E of $ 135.5 million, $ 139.3 million and $ 140.6 million during the years ended December 31, 2022, 2021 and 2020, respectively. In 2022 , no dividends were declared from OG&E to OGE Energy. In 2021 and 2020 , OG&E declared dividends to OGE Energy of $ 265.0 million and $ 325.0 million, respectively.
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The following table presents changes in the components of accumulated other comprehensive income (loss) attributable to OGE Energy during 2022 and 2021. All amounts below are presented net of tax. Pension Plan and Restoration of Retirement Income Plan Postretirement Benefit Plans (In millions) Net Gain (Loss) Prior Service Cost (Credit) Net Gain (Loss) Prior Service Cost (Credit) Other Comprehensive Gain (Loss) from Unconsolidated Affiliates Total Balance at December 31, 2020 $ ( 33.9 ) $ ( 0.2 ) $ 1.7 $ 1.6 $ ( 1.3 ) $ ( 32.1 ) Other comprehensive income (loss) before reclassifications 1.4 ( 1.1 ) ( 0.7 ) — 1.3 0.9 Amounts reclassified from accumulated other comprehensive income (loss) 1.6 0.1 0.1 ( 1.4 ) — 0.4 Settlement cost 6.0 — — — — 6.0 Net current period other comprehensive income (loss) 9.0 ( 1.0 ) ( 0.6 ) ( 1.4 ) 1.3 7.3 Balance at December 31, 2021 ( 24.9 ) ( 1.2 ) 1.1 0.2 — ( 24.8 ) Other comprehensive income (loss) before reclassifications ( 7.6 ) — 5.5 — — ( 2.1 ) Amounts reclassified from accumulated other comprehensive income (loss) 1.4 0.2 — ( 0.2 ) — 1.4 Settlement cost 13.6 — — — — 13.6 Net current period other comprehensive income (loss) 7.4 0.2 5.5 ( 0.2 ) — 12.9 Balance at December 31, 2022 $ ( 17.5 ) $ ( 1.0 ) $ 6.6 $ — $ — $ ( 11.9 ) The following table presents significant amounts reclassified out of accumulated other comprehensive income (loss) by the respective line items in net income during the years ended December 31, 2022 and 2021. Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Affected Line Item in Year Ended December 31, (In millions) 2022 2021 Amortization of Pension Plan and Restoration of Retirement Income Plan items: Actuarial losses $ ( 1.6 ) $ ( 2.5 ) (A) Prior service cost ( 0.3 ) ( 0.1 ) (A) Settlement cost ( 17.9 ) ( 8.7 ) (A) ( 19.8 ) ( 11.3 ) Income Before Taxes ( 4.6 ) ( 3.6 ) Income Tax Expense $ ( 15.2 ) $ ( 7.7 ) Net Income Amortization of postretirement benefit plans items: Prior service credit $ 0.3 $ 1.8 (A) Actuarial losses — ( 0.1 ) (A) 0.3 1.7 Income Before Taxes 0.1 0.4 Income Tax Expense $ 0.2 $ 1.3 Net Income Total reclassifications for the period, net of tax $ ( 15.0 ) $ ( 6.4 ) Net Income (A) These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost (see Note 11 for additional information).
Investment in Unconsolidated Affiliates and Related Party Transactions	Investment in Unconsolidated Affiliates and Related Party Transactions (Enable) On December 2, 2021, Energy Transfer completed its acquisition of Enable, and all of the 110,982,805 common units of Enable owned by OGE Energy were exchanged for 95,389,721 common units of Energy Transfer. As part of the transaction, Energy Transfer also acquired the general partner interests of Enable from OGE Energy and CenterPoint for cash consideration. OGE Energy accounted for its investment in Enable as an equity method investment until the merger with Energy Transfer closed on December 2, 2021. As a result of the transaction, OGE Energy recorded a pre-tax gain of $ 344.4 million, which contemplates the December 2, 2021 fair value of the Energy Transfer securities, the December 2, 2021 balance of OGE Energy's equity method investment in Enable, the $ 35.0 million cash payment received as part of the transaction ($ 5.0 million from Energy Transfer and $ 30.0 million from CenterPoint), the accumulated other comprehensive loss impact of OGE Energy's share of Enable's interest rate derivative losses and OGE Energy's transaction costs of $ 8.6 million. Further discussion of the transaction can be found in OGE Energy's 2021 Form 10-K . Under the equity method, the investment was adjusted each period for contributions made, distributions received and OGE Energy's share of the investee's comprehensive income as adjusted for basis differences. OGE Energy considered distributions received from Enable which did not exceed cumulative equity in earnings subsequent to the date of investment to be a return on investment and were classified as operating activities in the statements of cash flows. OGE Energy considered distributions received from Enable in excess of cumulative equity in earnings subsequent to the date of investment to be a return of investment and were classified as investing activities in the statements of cash flows. In this Form 10-K, Enable activity is included for the relevant portion of OGE Energy's 2021 information presented through December 2, 2021. The below information is provided for prior year context. The following tables present summarized unaudited financial information for 100 percent of Enable as of December 2, 2021 and for the period of January 1, 2021 through December 2, 2021 and the year ended December 31, 2020. Balance Sheet December 2, 2021 (In millions) Current assets $ 594 Non-current assets $ 11,227 Current liabilities $ 1,254 Non-current liabilities $ 3,281 Period of Income Statement January 1, 2021 through Year Ended (In millions) Total revenues $ 3,466 $ 2,463 Cost of natural gas and NGLs (excluding depreciation and amortization) $ 1,959 $ 965 Operating income $ 634 $ 465 Net income $ 461 $ 52 The following table presents a reconciliation of OGE Energy's equity in earnings (losses) of unconsolidated affiliates for the period of January 1, 2021 through December 2, 2021 and the year ended December 31, 2020. Period of (In millions) January 1, 2021 through Year Ended Enable net income $ 461.0 $ 52.0 Differences due to timing of OGE Energy and Enable accounting close 9.0 — Enable net income used to calculate OGE Energy's equity in earnings $ 470.0 $ 52.0 OGE Energy's percent ownership at period end 25.5 % 25.5 % OGE Energy's portion of Enable net income $ 119.8 $ 13.2 Amortization of basis difference and dilution recognition (A) 50.0 98.8 Impairment of OGE Energy's equity method investment in Enable (B) — ( 780.0 ) Equity in earnings (losses) of unconsolidated affiliates (C) $ 169.8 $ ( 668.0 ) (A) Includes loss on dilution, net of proportional basis difference recognition. (B) During the year ended December 31, 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable as, effective March 31, 2020, OGE estimated the fair value of its investment in Enable was below the book value and concluded the decline in value was not temporary. (C) For the year ended December 31, 2020, Enable recorded a $ 225.0 million impairment on an equity method investment, which ran through OGE Energy's portion of Enable net income and was offset by basis differences that flow through the amortization of basis difference and dilution recognition line item above. Distributions received from Enable were $ 73.4 million and $ 91.7 million during the years ended December 31, 2021 and 2020, respectively. Related Party Transactions - OGE Energy and Enable Prior to December 2, 2021, OGE Energy charged operating costs to Enable based on several factors, and operating costs directly related to Enable were assigned as such. Further, OGE Energy and Enable were parties to several agreements whereby OGE Energy provided specified support services to Enable, such as certain information technology, payroll and benefits administration. Under these agreements, OGE Energy charged operating costs to Enable of $ 0.3 million and $ 0.4 million for the period of January 1, 2021 through December 2, 2021 and the year ended December 31, 2020, respectively. OGE Energy also provided retirement benefits and retiree health care benefits to employees previously seconded to Enable. OGE Energy billed Enable for reimbursement of $ 12.2 million and $ 17.3 million in 2021 and 2020, respectively, under the former seconding agreement for employment costs. As of a result of the merger between Enable and Energy Transfer, the seconding agreement was terminated, and those employees are no longer employed by OGE Energy. If lump sum payments were made to those employees previously seconded to Enable, OGE Energy would recognize a settlement or curtailment of the pension/retiree health care charges, which would increase expense at OGE Energy by $ 5.1 million. Settlement and curtailment charges associated with the employees previously seconded to Enable are not reimbursable to OGE Energy. OGE Energy had accounts receivable from Enable for amounts billed for support services, including the cost of seconded employees, of $ 0.3 million as of December 31, 2021, which is included in Accounts Receivable in OGE Energy's balance sheets. Related Party Transactions - OG&E and Enable Enable provided gas transportation services to OG&E pursuant to agreements that granted Enable the responsibility of delivering natural gas to OG&E's generating facilities and performing an imbalance service. Upon the closing of the merger between Enable and Energy Transfer, these contracts were assumed by Energy Transfer. The following table presents summarized related party transactions between OG&E and Enable during the period of January 1, 2021 through December 2, 2021 and the year ended December 31, 2020. Period of (In millions) January 1, 2021 through Year Ended Operating revenues: Electricity to power electric compression assets $ 13.3 $ 15.1 Fuel, purchased power and direct transmission expense: Natural gas transportation services $ 32.7 $ 32.8 Natural gas purchases (sales) $ ( 33.5 ) $ 2.7
Investment in Equity Securities of Energy Transfer	Investment in Equity Securities of Energy Transfer For the period of December 2, 2021 through September 30, 2022, OGE Energy accounted for its investment in Energy Transfer's equity securities as an equity investment with a readily determinable fair value under ASC 321, "Investments – Equity Securities." As of the end of September 2022, OGE Energy had sold all of its 95.4 million Energy Transfer limited partner units, resulting in pre-tax net proceeds of $ 1,067.2 million. Prior to exiting its Energy Transfer investment, OGE Energy presented the Energy Transfer equity securities at fair value in its balance sheet. OGE Energy presents realized gains and losses of the equity securities, as well as dividend income from the investment, within the Other Income (Expense) section in its statement of income, as appropriate. During the year ended December 31, 2022, OGE Energy recognized a gain of $ 282.1 million related to its investment in Energy Transfer's equity securities. Due to OGE Energy's sale of all Energy Transfer limited partner units, at December 31, 2022, there is no unrecognized gain or loss related to the investment. For the period between December 2, 2021 and December 31, 2021, OGE Energy had an unrealized loss of $ 8.6 million related to its investment in Energy Transfer's equity securities. During the year ended December 31, 2022, OGE Energy received distributions of $ 34.0 million from Energy Transfer, which are presented within Other Income in OGE Energy's 2022 consolidated income statement.

Fair Value Measures and Disclos

Fair Value Measures and Disclosures (Policies)	12 Months Ended
Fair Value Measures and Disclosures (Policies)	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurement, Policy	The classification of the Registrants' fair value measurements requires judgment regarding the degree to which market data is observable or corroborated by observable market data. GAAP establishes a fair value hierarchy that prioritizes the inputs used to measure fair value based on observable and unobservable data. The hierarchy categorizes the inputs into three levels, with the highest priority given to quoted prices in active markets for identical unrestricted assets or liabilities (Level 1) and the lowest priority given to unobservable inputs (Level 3). Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The three levels defined in the fair value hierarchy are as follows: Level 1 inputs are quoted prices in active markets for identical unrestricted assets or liabilities that are accessible at the measurement date. Level 2 inputs are inputs other than quoted prices in active markets included within Level 1 that are either directly or indirectly observable at the reporting date for the asset or liability for substantially the full term of the asset or liability. Level 2 inputs include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. Level 3 inputs are prices or valuation techniques for the asset or liability that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). Unobservable inputs reflect the reporting entity's own assumptions about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk).

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
Summary of Significant Accounting Policies (Tables)	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Regulatory Assets and Liabilities	The following table presents a summary of OG&E's regulatory assets and liabilities. December 31 (In millions) 2022 2021 REGULATORY ASSETS Current: Oklahoma fuel clause under recoveries $ 474.3 $ 140.4 Arkansas fuel clause under recoveries 40.6 11.5 Oklahoma Energy Efficiency Rider under recoveries (A) 7.7 11.7 Other (A) 4.7 19.0 Total current regulatory assets $ 527.3 $ 182.6 Non-current: Oklahoma deferred storm expenses $ 206.3 $ 172.8 Benefit obligations regulatory asset 119.7 109.2 Arkansas Winter Storm Uri costs 78.2 88.9 Pension tracker 57.2 42.9 Sooner Dry Scrubbers 18.1 18.9 Arkansas deferred pension expenses 12.3 12.1 Unamortized loss on reacquired debt 8.0 8.9 COVID-19 impacts 7.7 8.2 Frontier Plant deferred expenses 5.2 6.7 Oklahoma Winter Storm Uri costs — 747.9 Other 11.6 14.3 Total non-current regulatory assets $ 524.3 $ 1,230.8 REGULATORY LIABILITIES Current: SPP cost tracker over recovery (B) $ 3.0 $ — Other (B) 2.5 2.5 Total current regulatory liabilities $ 5.5 $ 2.5 Non-current: Income taxes refundable to customers, net $ 894.7 $ 930.7 Accrued removal obligations, net 250.5 296.8 Other 1.9 3.6 Total non-current regulatory liabilities $ 1,147.1 $ 1,231.1 (A) Included in Other Current Assets in the balance sheets. Included in Other Current Liabilities in the balance sheets.
Summary of Components of Benefit Obligation	The following table presents a summary of the components of the benefit obligations regulatory asset. December 31 (In millions) 2022 2021 Pension Plan and Restoration of Retirement Income Plan: Net loss $ 110.0 $ 89.6 Postretirement Benefit Plans: Net loss 9.7 23.2 Prior service cost — ( 3.6 ) Total $ 119.7 $ 109.2
Schedule of Jointly Owned Utility Plants	The following tables present OG&E's ownership interest in the jointly-owned McClain Plant and the jointly-owned Redbud Plant, and, as disclosed below, only OG&E's ownership interest is reflected in the property, plant and equipment and accumulated depreciation balances in these tables. The owners of the remaining interests in the McClain Plant and the Redbud Plant are responsible for providing their own financing of capital expenditures. Also, only OG&E's proportionate interests of any direct expenses of the McClain Plant and the Redbud Plant, such as fuel, maintenance expense and other operating expenses, are included in the applicable financial statement captions in the statements of income. December 31, 2022 (In millions) Percentage Ownership Total Property, Plant and Equipment Accumulated Depreciation Net Property, Plant and Equipment McClain Plant (A) 77 % $ 261.9 $ 119.4 $ 142.5 Redbud Plant (A)(B) 51 % $ 542.1 $ 225.2 $ 316.9 (A) Construction work in progress was $ 0.7 million and $ 1.5 million for the McClain and Redbud Plants, respectively. (B) This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 78.2 million. December 31, 2021 (In millions) Percentage Ownership Total Property, Plant and Equipment Accumulated Depreciation Net Property, Plant and Equipment McClain Plant (A) 77 % $ 258.5 $ 109.0 $ 149.5 Redbud Plant (A)(B) 51 % $ 538.2 $ 203.4 $ 334.8 (A) Construction work in progress was $ 0.2 million and $0.2 million for the McClain and Redbud Plants, respectively. (B) This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 72.8 million.
Summary of Property Plant and Equipment	The following tables present the Registrants' major classes of property, plant and equipment and related accumulated depreciation. December 31, 2022 (In millions) Total Property, Plant and Equipment Accumulated Depreciation Net Property, Plant and Equipment OG&E: Distribution assets $ 5,781.3 $ 1,527.1 $ 4,254.2 Electric generation assets (A) 5,188.1 1,982.7 3,205.4 Transmission assets (B) 3,180.5 667.9 2,512.6 Intangible plant 384.0 193.6 190.4 Other property and equipment 591.3 213.2 378.1 OG&E property, plant and equipment 15,125.2 4,584.5 10,540.7 Non-OG&E property, plant and equipment 6.1 — 6.1 Total OGE Energy property, plant and equipment $ 15,131.3 $ 4,584.5 $ 10,546.8 (A) This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 78.3 million. (B) This amount includes a plant acquisition adjustment of $ 3.3 million and accumulated amortization of $ 1.0 million. December 31, 2021 (In millions) Total Property, Plant and Equipment Accumulated Depreciation Net Property, Plant and Equipment OG&E: Distribution assets $ 5,225.8 $ 1,477.5 $ 3,748.3 Electric generation assets (A) 5,037.9 1,839.0 3,198.9 Transmission assets (B) 3,038.2 627.0 2,411.2 Intangible plant 301.1 171.7 129.4 Other property and equipment 542.7 203.7 339.0 OG&E property, plant and equipment 14,145.7 4,318.9 9,826.8 Non-OG&E property, plant and equipment 6.1 — 6.1 Total OGE Energy property, plant and equipment $ 14,151.8 $ 4,318.9 $ 9,832.9 (A) This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 72.8 million. (B) This amount includes a plant acquisition adjustment of $ 3.3 million and accumulated amortization of $ 0.9 million.
Schedule of Change in Asset Retirement Obligation	The following table presents changes to OG&E's asset retirement obligations during the years ended December 31, 2022 and 2021. (In millions) 2022 2021 Balance at January 1 $ 80.2 $ 79.6 Accretion expense 0.6 0.6 Liabilities settled ( 2.5 ) — Balance at December 31 $ 78.3 $ 80.2
Summary of Accumulated Other Comprehensive Income (Loss) (Details)	The following table presents changes in the components of accumulated other comprehensive income (loss) attributable to OGE Energy during 2022 and 2021. All amounts below are presented net of tax. Pension Plan and Restoration of Retirement Income Plan Postretirement Benefit Plans (In millions) Net Gain (Loss) Prior Service Cost (Credit) Net Gain (Loss) Prior Service Cost (Credit) Other Comprehensive Gain (Loss) from Unconsolidated Affiliates Total Balance at December 31, 2020 $ ( 33.9 ) $ ( 0.2 ) $ 1.7 $ 1.6 $ ( 1.3 ) $ ( 32.1 ) Other comprehensive income (loss) before reclassifications 1.4 ( 1.1 ) ( 0.7 ) — 1.3 0.9 Amounts reclassified from accumulated other comprehensive income (loss) 1.6 0.1 0.1 ( 1.4 ) — 0.4 Settlement cost 6.0 — — — — 6.0 Net current period other comprehensive income (loss) 9.0 ( 1.0 ) ( 0.6 ) ( 1.4 ) 1.3 7.3 Balance at December 31, 2021 ( 24.9 ) ( 1.2 ) 1.1 0.2 — ( 24.8 ) Other comprehensive income (loss) before reclassifications ( 7.6 ) — 5.5 — — ( 2.1 ) Amounts reclassified from accumulated other comprehensive income (loss) 1.4 0.2 — ( 0.2 ) — 1.4 Settlement cost 13.6 — — — — 13.6 Net current period other comprehensive income (loss) 7.4 0.2 5.5 ( 0.2 ) — 12.9 Balance at December 31, 2022 $ ( 17.5 ) $ ( 1.0 ) $ 6.6 $ — $ — $ ( 11.9 )
Reclassified Out of Accumulated Other Comprehensive Income (Loss)	The following table presents significant amounts reclassified out of accumulated other comprehensive income (loss) by the respective line items in net income during the years ended December 31, 2022 and 2021. Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Affected Line Item in Year Ended December 31, (In millions) 2022 2021 Amortization of Pension Plan and Restoration of Retirement Income Plan items: Actuarial losses $ ( 1.6 ) $ ( 2.5 ) (A) Prior service cost ( 0.3 ) ( 0.1 ) (A) Settlement cost ( 17.9 ) ( 8.7 ) (A) ( 19.8 ) ( 11.3 ) Income Before Taxes ( 4.6 ) ( 3.6 ) Income Tax Expense $ ( 15.2 ) $ ( 7.7 ) Net Income Amortization of postretirement benefit plans items: Prior service credit $ 0.3 $ 1.8 (A) Actuarial losses — ( 0.1 ) (A) 0.3 1.7 Income Before Taxes 0.1 0.4 Income Tax Expense $ 0.2 $ 1.3 Net Income Total reclassifications for the period, net of tax $ ( 15.0 ) $ ( 6.4 ) Net Income (A) These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost (see Note 11 for additional information).
Summarized Balance Sheet Financial Information for Equity Method Investment	The following tables present summarized unaudited financial information for 100 percent of Enable as of December 2, 2021 and for the period of January 1, 2021 through December 2, 2021 and the year ended December 31, 2020. Balance Sheet December 2, 2021 (In millions) Current assets $ 594 Non-current assets $ 11,227 Current liabilities $ 1,254 Non-current liabilities $ 3,281
Summarized Income Statement Financial Information for Equity Method Investment	Period of Income Statement January 1, 2021 through Year Ended (In millions) Total revenues $ 3,466 $ 2,463 Cost of natural gas and NGLs (excluding depreciation and amortization) $ 1,959 $ 965 Operating income $ 634 $ 465 Net income $ 461 $ 52
Reconciliation of Equity in Earnings (Losses) of Unconsolidated Affiliates	The following table presents a reconciliation of OGE Energy's equity in earnings (losses) of unconsolidated affiliates for the period of January 1, 2021 through December 2, 2021 and the year ended December 31, 2020. Period of (In millions) January 1, 2021 through Year Ended Enable net income $ 461.0 $ 52.0 Differences due to timing of OGE Energy and Enable accounting close 9.0 — Enable net income used to calculate OGE Energy's equity in earnings $ 470.0 $ 52.0 OGE Energy's percent ownership at period end 25.5 % 25.5 % OGE Energy's portion of Enable net income $ 119.8 $ 13.2 Amortization of basis difference and dilution recognition (A) 50.0 98.8 Impairment of OGE Energy's equity method investment in Enable (B) — ( 780.0 ) Equity in earnings (losses) of unconsolidated affiliates (C) $ 169.8 $ ( 668.0 ) (A) Includes loss on dilution, net of proportional basis difference recognition. (B) During the year ended December 31, 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable as, effective March 31, 2020, OGE estimated the fair value of its investment in Enable was below the book value and concluded the decline in value was not temporary. (C) For the year ended December 31, 2020, Enable recorded a $ 225.0 million impairment on an equity method investment, which ran through OGE Energy's portion of Enable net income and was offset by basis differences that flow through the amortization of basis difference and dilution recognition line item above.
Schedule of Related Party Transactions	The following table presents summarized related party transactions between OG&E and Enable during the period of January 1, 2021 through December 2, 2021 and the year ended December 31, 2020. Period of (In millions) January 1, 2021 through Year Ended Operating revenues: Electricity to power electric compression assets $ 13.3 $ 15.1 Fuel, purchased power and direct transmission expense: Natural gas transportation services $ 32.7 $ 32.8 Natural gas purchases (sales) $ ( 33.5 ) $ 2.7

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	12 Months Ended
Revenue from Contracts with Customers (Tables)	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table presents OG&E's revenues from contracts with customers disaggregated by customer classification. OG&E's operating revenues disaggregated by customer classification can be found in "OG&E (Electric Company) Results of Operations" within "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations." Year Ended December 31, (In millions) 2022 2021 2020 Residential $ 1,272.6 $ 1,309.1 $ 842.7 Commercial 803.5 749.2 465.6 Industrial 317.2 323.0 192.6 Oilfield 304.2 312.8 169.2 Public authorities and street light 291.6 284.4 172.3 System sales revenues 2,989.1 2,978.5 1,842.4 Provision for rate refund ( 1.2 ) — 3.8 Integrated market 163.8 468.9 49.6 Transmission 131.7 140.2 143.3 Other 20.8 1.1 30.7 Revenues from contracts with customers $ 3,304.2 $ 3,588.7 $ 2,069.8

Leases (Tables)

Leases (Tables)	12 Months Ended
Leases (Tables)	Dec. 31, 2022
Leases [Abstract]
Schedule of Financial Statement Information of Lease Liabilities	The following tables present amounts recognized for operating leases in the Registrants' income statements, cash flow statements and balance sheets and supplemental information related to those amounts recognized. OGE Energy OG&E Year Ended December 31, Year Ended December 31, (In millions) 2022 2021 2020 2022 2021 2020 Operating lease cost $ 5.9 $ 6.3 $ 6.4 $ 5.9 $ 5.7 $ 5.5 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 5.3 $ 6.3 $ 6.4 $ 5.3 $ 5.7 $ 5.5 Right-of-use assets obtained in exchange for new operating lease liabilities $ 1.5 $ — $ 1.4 $ 1.5 $ — $ 1.4 OGE Energy OG&E (Dollars in millions) December 31, 2022 December 31, 2021 December 31, 2022 December 31, 2021 Right-of-use assets at period end (A) $ 30.2 $ 33.0 $ 30.2 $ 33.0 Operating lease liabilities at period end (B) $ 34.8 $ 37.6 $ 34.8 $ 37.6 Operating lease weighted-average remaining lease term (in years) 11.6 12.2 11.6 12.2 Operating lease weighted-average discount rate 4.0 % 3.9 % 4.0 % 3.9 % (A) Included in Property, Plant and Equipment in the Registrants' balance sheets. (B) Included in Other Deferred Credits and Other Liabilities in the Registrants' balance sheets.
Schedule of Maturity Analysis of Operating Lease Liabilities	The following table presents a maturity analysis of the Registrants' operating lease liabilities. Future minimum operating lease payments as of December 31: OGE Energy OG&E (In millions) 2023 $ 5.7 $ 5.7 2024 3.7 3.7 2025 3.5 3.5 2026 3.0 3.0 2027 3.0 3.0 Thereafter 25.7 25.7 Total future minimum lease payments 44.6 44.6 Less: Imputed interest 9.8 9.8 Present value of net minimum lease payments $ 34.8 $ 34.8

Investment in Unconsolidated Af

Investment in Unconsolidated Affiliate (Tables)	12 Months Ended
Investment in Unconsolidated Affiliate (Tables)	Dec. 31, 2022
Equity Method Investments and Joint Ventures [Abstract]
Summarized Balance Sheet Financial Information for Equity Method Investment	The following tables present summarized unaudited financial information for 100 percent of Enable as of December 2, 2021 and for the period of January 1, 2021 through December 2, 2021 and the year ended December 31, 2020. Balance Sheet December 2, 2021 (In millions) Current assets $ 594 Non-current assets $ 11,227 Current liabilities $ 1,254 Non-current liabilities $ 3,281
Summarized Income Statement Financial Information for Equity Method Investment	Period of Income Statement January 1, 2021 through Year Ended (In millions) Total revenues $ 3,466 $ 2,463 Cost of natural gas and NGLs (excluding depreciation and amortization) $ 1,959 $ 965 Operating income $ 634 $ 465 Net income $ 461 $ 52
Reconciliation of Equity in Earnings (Losses) of Unconsolidated Affiliates	The following table presents a reconciliation of OGE Energy's equity in earnings (losses) of unconsolidated affiliates for the period of January 1, 2021 through December 2, 2021 and the year ended December 31, 2020. Period of (In millions) January 1, 2021 through Year Ended Enable net income $ 461.0 $ 52.0 Differences due to timing of OGE Energy and Enable accounting close 9.0 — Enable net income used to calculate OGE Energy's equity in earnings $ 470.0 $ 52.0 OGE Energy's percent ownership at period end 25.5 % 25.5 % OGE Energy's portion of Enable net income $ 119.8 $ 13.2 Amortization of basis difference and dilution recognition (A) 50.0 98.8 Impairment of OGE Energy's equity method investment in Enable (B) — ( 780.0 ) Equity in earnings (losses) of unconsolidated affiliates (C) $ 169.8 $ ( 668.0 ) (A) Includes loss on dilution, net of proportional basis difference recognition. (B) During the year ended December 31, 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable as, effective March 31, 2020, OGE estimated the fair value of its investment in Enable was below the book value and concluded the decline in value was not temporary. (C) For the year ended December 31, 2020, Enable recorded a $ 225.0 million impairment on an equity method investment, which ran through OGE Energy's portion of Enable net income and was offset by basis differences that flow through the amortization of basis difference and dilution recognition line item above.
Schedule of Related Party Transactions [Table Text Block]	The following table presents summarized related party transactions between OG&E and Enable during the period of January 1, 2021 through December 2, 2021 and the year ended December 31, 2020. Period of (In millions) January 1, 2021 through Year Ended Operating revenues: Electricity to power electric compression assets $ 13.3 $ 15.1 Fuel, purchased power and direct transmission expense: Natural gas transportation services $ 32.7 $ 32.8 Natural gas purchases (sales) $ ( 33.5 ) $ 2.7

Related Party Disclosures (Tabl

Related Party Disclosures (Tables)	12 Months Ended
Related Party Disclosures (Tables)	Dec. 31, 2022
Related Party Transactions [Abstract]
Schedule of Related Party Transactions [Table Text Block]	The following table presents summarized related party transactions between OG&E and Enable during the period of January 1, 2021 through December 2, 2021 and the year ended December 31, 2020. Period of (In millions) January 1, 2021 through Year Ended Operating revenues: Electricity to power electric compression assets $ 13.3 $ 15.1 Fuel, purchased power and direct transmission expense: Natural gas transportation services $ 32.7 $ 32.8 Natural gas purchases (sales) $ ( 33.5 ) $ 2.7

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
Fair Value Measurements (Tables)	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value, by Balance Sheet Grouping [Table Text Block]	The following table presents OGE Energy's previous financial instrument measured at fair value on a recurring basis and the carrying amount and fair value of the Registrants' financial instruments at December 31, 2022 and 2021, as well as the classification level within the fair value hierarchy. As of the end of September 2022, OGE Energy had sold all of the Energy Transfer limited partner units it received as a result of the merger transaction between Enable and Energy Transfer in December 2021. 2022 2021 December 31 (In millions) Carrying Fair Carrying Fair Classification Financial instrument measured at fair value on a recurring basis: OGE Energy investment in Energy Transfer's equity securities $ — $ — $ 785.1 $ 785.1 Level 1 Financial instruments for which fair value is only disclosed: Long-term Debt (including Long-term Debt due within one year): OGE Energy Senior Notes $ 499.9 $ 491.2 $ 499.9 $ 497.8 Level 2 OGE Energy Term Loan $ 49.8 $ 50.0 $ — $ — Level 2 OG&E Senior Notes $ 3,854.2 $ 3,477.1 $ 3,851.8 $ 4,460.2 Level 2 OG&E Industrial Authority Bonds $ 135.4 $ 135.4 $ 135.4 $ 135.4 Level 2 Tinker Debt $ 9.3 $ 7.3 $ 9.3 $ 10.0 Level 3

Stock Based Compensation (Table

Stock Based Compensation (Tables)	12 Months Ended
Stock Based Compensation (Tables)	Dec. 31, 2022
Stock-Based Compensation [Abstract]
Schedule of Pre-tax Compensation Expense and Related Income Tax Benefit	The following table presents the Registrants' pre-tax compensation expense and related income tax benefit for the years ended December 31, 2022, 2021 and 2020 related to performance units and restricted stock units for the Registrants' employees. OGE Energy OG&E Year Ended December 31 (In millions) 2022 2021 2020 2022 2021 2020 Performance units: Total shareholder return $ 7.2 $ 7.5 $ 7.9 $ 2.2 $ 1.8 $ 2.3 Earnings per share (A) — — 1.0 — — 0.3 Total performance units 7.2 7.5 8.9 2.2 1.8 2.6 Restricted stock units 2.5 2.3 0.9 0.7 0.4 0.4 Total compensation expense $ 9.7 $ 9.8 $ 9.8 $ 2.9 $ 2.2 $ 3.0 Income tax benefit $ 2.3 $ 2.5 $ 2.5 $ 0.7 $ 0.6 $ 0.8 (A) In 2019, the Compensation Committee of OGE Energy's Board of Directors voted to grant restricted stock units in lieu of performance units based on earnings per share. The final grants of performance units based on earnings per share vested as of December 31, 2020 and were paid out in March 2021.
Schedule of Performance Units Granted and Assumptions Used to Calculate Grant Date Fair Value of Performance Units	The following table presents the number of performance units granted based on total shareholder return and the assumptions used to calculate the grant date fair value of the performance units based on total shareholder return. OGE Energy OG&E 2022 2021 2020 2022 2021 2020 Number of units granted 216,437 249,909 201,552 60,923 68,720 67,975 Fair value of units granted $ 41.10 $ 38.14 $ 38.03 $ 41.10 $ 38.14 $ 38.03 Expected dividend yield 4.8 % 4.7 % 3.5 % 4.8 % 4.7 % 3.5 % Expected price volatility 29.0 % 29.0 % 15.0 % 29.0 % 29.0 % 15.0 % Risk-free interest rate 1.71 % 0.22 % 1.17 % 1.71 % 0.22 % 1.17 % Expected life of units (in years) 2.85 2.84 2.85 2.85 2.85 2.85
Schedule of Restricted Stock Units Granted and Grant Date Fair Value	The following table presents the number of restricted stock units granted and the grant date fair value. OGE Energy OG&E 2022 2021 2020 2022 2021 2020 Restricted stock units granted 116,539 89,197 67,193 32,804 22,911 22,665 Fair value of restricted stock units granted $ 35.72 $ 31.11 $ 43.69 $ 35.72 $ 30.91 $ 43.69
Schedule of Activity for Performance Units and Restricted Stock Units	The following tables present a summary of the activity for the Registrants' performance units and restricted stock units for the year ended December 31, 2022. The table designated as "OGE Energy" below includes the OG&E standalone activity, as OGE Energy represents consolidated results. OGE Energy Performance Units Restricted Stock Units (Dollars in millions) Number Aggregate Intrinsic Value Number Aggregate Intrinsic Value Units/shares outstanding at 12/31/21 581,252 133,671 Granted 216,437 (A) 116,539 Converted ( 172,748 ) (B) $ — N/A Vested N/A ( 47,995 ) $ 1.9 Forfeited ( 16,566 ) ( 12,732 ) Units/shares outstanding at 12/31/22 608,375 $ 34.1 189,483 $ 7.5 Units/shares fully vested at 12/31/22 161,690 (C) $ 3.7 N/A N/A OG&E Performance Units Restricted Stock Units (Dollars in millions) Number Aggregate Intrinsic Value Number Aggregate Intrinsic Value Units/shares outstanding at 12/31/21 161,310 35,613 Granted 60,923 (A) 32,804 Converted ( 48,195 ) (B) $ — N/A Vested N/A ( 11,807 ) $ 0.5 Forfeited ( 4,217 ) ( 4,342 ) Employee migration 802 (D) 491 (D) Units/shares outstanding at 12/31/22 170,623 $ 9.6 52,759 $ 2.1 Units/shares fully vested at 12/31/22 44,550 (C) $ 1.0 N/A N/A (A) For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from zero percent to 200 percent of the target. (B) These amounts represent performance units that were canceled at December 31, 2021 due to the performance metric threshold not being met. (C) These amounts represent performance units that vested at December 31, 2022. Actual expected amounts to be paid out in 2023 will differ based on the percentage at which the performance metric was met and are dependent upon Compensation Committee approval. (D) Due to certain employees transferring between OG&E and OGE Energy.
Summary of Activity for Non-vested Performance Units and Restricted Stock Units	The following tables present a summary of the activity for the Registrants' non-vested performance units and restricted stock units for the year ended December 31, 2022. The table designated as "OGE Energy" below includes the OG&E standalone activity, as OGE Energy represents consolidated results. OGE Energy Performance Units Restricted Stock Units Number Weighted-Average Number Weighted-Average Units/shares non-vested at 12/31/21 408,504 $ 38.05 133,671 $ 35.64 Granted 216,437 (A) $ 41.10 116,539 $ 35.72 Vested ( 161,690 ) $ 38.04 ( 47,995 ) $ 39.63 Forfeited ( 16,566 ) $ 39.45 ( 12,732 ) $ 35.95 Units/shares non-vested at 12/31/22 446,685 $ 39.53 189,483 $ 33.75 OG&E Performance Units Restricted Stock Units Number Weighted-Average Number Weighted-Average Units/shares non-vested at 12/31/21 113,115 $ 38.10 35,613 $ 35.52 Granted 60,923 (A) $ 41.10 32,804 $ 35.72 Vested ( 44,550 ) $ 38.03 ( 11,807 ) $ 39.71 Forfeited ( 4,217 ) $ 39.96 ( 4,342 ) $ 35.93 Employee migration 802 (B) $ 42.18 491 (B) $ 34.83 Units/shares non-vested at 12/31/22 126,073 $ 39.53 52,759 $ 33.78 (A) For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from zero percent to 200 percent of the target. (B) Due to certain employees transferring between OG&E and OGE Energy.
Summary of Fair Value for Vested Performance Units and Restricted Stock Units	The following table presents a summary of the Registrants' fair value for vested performance units and restricted stock units. OGE Energy OG&E Year Ended December 31 (In millions) 2022 2021 2020 2022 2021 2020 Performance units: Total shareholder return $ 6.2 $ 8.1 $ 8.7 $ 1.7 $ 2.3 $ 2.8 Earnings per share $ — $ — $ 2.5 $ — $ — $ 0.8 Restricted stock units $ 2.1 $ 2.2 $ 0.1 $ 0.5 $ 0.5 $ 0.1
Summary of Unrecognized Compensation Cost and Weighted-average Periods Over which Compensation Cost is Expected to be Recognized	The following table presents a summary of the Registrants' unrecognized compensation cost for non-vested performance units and restricted stock units and the weighted-average periods over which the compensation cost is expected to be recognized. OGE Energy OG&E December 31, 2022 Unrecognized (In millions) Weighted Average (In years) Unrecognized (In millions) Weighted Average (In years) Performance units $ 7.7 1.66 $ 2.2 1.65 Restricted stock units 3.5 1.76 0.7 1.77 Total unrecognized compensation cost $ 11.2 $ 2.9

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2022
Income Taxes [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The following table presents the components of income tax expense (benefit). OGE Energy OG&E Year Ended December 31 (In millions) 2022 2021 2020 2022 2021 2020 Provision (benefit) for current income taxes: Federal $ 250.8 $ 16.4 $ 8.4 $ ( 141.2 ) $ ( 9.0 ) $ ( 3.8 ) State 28.8 1.7 0.5 ( 0.9 ) 9.0 ( 0.6 ) Total provision (benefit) for current income taxes 279.6 18.1 8.9 ( 142.1 ) — ( 4.4 ) Provision (benefit) for deferred income taxes, net: Federal ( 110.8 ) 133.1 ( 105.2 ) 219.9 58.3 45.7 State ( 45.2 ) ( 10.0 ) ( 31.1 ) ( 1.4 ) ( 16.5 ) ( 6.6 ) Total provision (benefit) for deferred income taxes, net ( 156.0 ) 123.1 ( 136.3 ) 218.5 41.8 39.1 Total income tax expense (benefit) $ 123.6 $ 141.2 $ ( 127.4 ) $ 76.4 $ 41.8 $ 34.7
Schedule of Effective Income Tax Rate Reconciliation	The following table presents a reconciliation of the statutory tax rates to the effective income tax rate. OGE Energy OG&E Year Ended December 31 2022 2021 2020 2022 2021 2020 Statutory federal tax rate 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % State income taxes, net of federal income tax ( 1.0 ) 0.9 ( 1.4 ) ( 0.4 ) ( 1.4 ) ( 1.6 ) Stock-based compensation — 0.1 ( 0.3 ) — — — Executive compensation limitation 0.1 0.1 0.2 — — — Amortization of net unfunded deferred taxes ( 3.2 ) ( 2.1 ) ( 4.4 ) ( 5.0 ) ( 4.6 ) ( 4.8 ) Federal renewable energy credit (A) — ( 2.0 ) ( 5.0 ) — ( 4.4 ) ( 5.4 ) Remeasurement of state deferred taxes due to Energy Transfer merger (B) — ( 1.1 ) — — — — Remeasurement of state deferred tax liabilities ( 0.6 ) ( 0.6 ) 0.9 — — — 401(k) dividends ( 0.2 ) ( 0.2 ) ( 0.4 ) — — — Impairment of OGE Energy's investment in Enable (C) — — 31.6 — — — Other ( 0.4 ) — 0.1 ( 0.8 ) ( 0.2 ) 0.1 Effective income tax rate 15.7 % 16.1 % 42.3 % 14.8 % 10.4 % 9.3 % (A) Represents credits primarily associated with the production from OG&E's wind farms. (B) In connection with the Enable and Energy Transfer merger, the state income tax rates were expected to decrease, as Energy Transfer operates in significantly more states with generally lower tax rates than the historic Enable operating area. (C) As discussed in Note 1, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable in March 2020, which resulted in a tax benefit being recorded that caused a significant variance to the effective tax rate. This variance has been presented in the table as a single line item in order to facilitate comparability of other components of the effective tax rate.
Schedule of Deferred Tax Assets and Liabilities	The following table presents the components of Deferred Income Taxes at December 31, 2022 and 2021. OGE Energy OG&E December 31 (In millions) 2022 2021 2022 2021 Deferred income tax liabilities, net: Accelerated depreciation and other property related differences $ 1,714.5 $ 1,677.3 $ 1,714.5 $ 1,677.3 Investment in Energy Transfer's equity securities — 363.5 — — Regulatory assets 54.8 52.1 54.7 52.1 Pension Plan 18.0 10.7 35.4 32.0 Other ( 5.1 ) 7.4 ( 5.8 ) ( 4.7 ) Derivative instruments 2.4 2.2 — — Bond redemption-unamortized costs 1.6 1.8 1.6 1.8 Income taxes recoverable from customers, net ( 216.7 ) ( 225.8 ) ( 216.7 ) ( 225.8 ) State tax credits ( 221.2 ) ( 221.2 ) ( 208.5 ) ( 205.9 ) Federal tax credits — ( 208.4 ) — ( 209.8 ) Regulatory liabilities ( 60.8 ) ( 72.0 ) ( 60.8 ) ( 72.0 ) Asset retirement obligations ( 18.8 ) ( 19.4 ) ( 18.8 ) ( 19.4 ) Postretirement medical and life insurance benefits ( 19.2 ) ( 19.2 ) ( 12.7 ) ( 13.0 ) Accrued liabilities ( 11.2 ) ( 9.5 ) ( 7.3 ) ( 7.3 ) Deferred federal investment tax credits ( 2.9 ) ( 3.1 ) ( 2.9 ) ( 3.1 ) Net operating losses — ( 1.0 ) — — Accrued vacation ( 1.4 ) ( 1.5 ) ( 1.1 ) ( 1.2 ) Uncollectible accounts ( 0.5 ) ( 0.6 ) ( 0.5 ) ( 0.6 ) Total deferred income tax liabilities, net $ 1,233.5 $ 1,333.3 $ 1,271.1 $ 1,000.4
Schedule of Unrecognized Tax Benefits Roll Forward	The following table presents a reconciliation of the Registrants' total gross unrecognized tax benefits as of the years ended December 31, 2022, 2021 and 2020. (In millions) 2022 2021 2020 Balance at January 1 $ 22.4 $ 21.9 $ 20.7 Tax positions related to current year: Additions — 1.7 1.2 Reductions ( 1.7 ) ( 1.2 ) — Balance at December 31 $ 20.7 $ 22.4 $ 21.9
Summary of Tax Credit Carryforwards	The following table presents a summary of these carry forwards. OGE Energy OG&E (In millions) Carry Forward Amount Deferred Tax Asset Carry Forward Amount Deferred Tax Asset Earliest Expiration Date State tax credits: Oklahoma investment tax credits $ 242.8 $ 191.8 $ 226.7 $ 179.1 N/A Oklahoma capital investment board credits $ 12.8 $ 12.8 $ 12.8 $ 12.8 N/A Oklahoma zero emission tax credits $ 22.6 $ 16.6 $ 22.6 $ 16.6 2023 N/A - not applicable

Common Equity (Tables)

Common Equity (Tables)	12 Months Ended
Common Equity (Tables)	Dec. 31, 2022
Equity [Abstract]
Schedule of Earnings Per Share Basic and Diluted	The following table presents the calculation of basic and diluted earnings (loss) per share for OGE Energy. (In millions except per share data) 2022 2021 2020 Net income (loss) $ 665.7 $ 737.3 $ ( 173.7 ) Average common shares outstanding: Basic average common shares outstanding 200.2 200.1 200.1 Effect of dilutive securities: Contingently issuable shares (performance and restricted stock units) 0.6 0.2 — Diluted average common shares outstanding 200.8 200.3 200.1 Basic earnings (loss) per average common share $ 3.33 $ 3.68 $ ( 0.87 ) Diluted earnings (loss) per average common share $ 3.32 $ 3.68 $ ( 0.87 ) Anti-dilutive shares excluded from earnings per share calculation — — 0.3

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
Long-Term Debt (Tables)	Dec. 31, 2022
Long-term Debt, Unclassified [Abstract]
Schedule of Long-term Debt Instruments	OG&E has tax-exempt pollution control bonds with optional redemption provisions that allow the holders to request repayment of the bonds on any business day. The following table presents information about these bonds, which can be tendered at the option of the holder during the next 12 months. Series Date Due Amount (In millions) 0.11 % — 3.98 % Garfield Industrial Authority, January 1, 2025 $ 47.0 0.11 % — 3.95 % Muskogee Industrial Authority, January 1, 2025 32.4 0.11 % — 3.98 % Muskogee Industrial Authority, June 1, 2027 56.0 Total (redeemable during next 12 months) $ 135.4

Short-Term Debt and Credit Fa_2

Short-Term Debt and Credit Facilities (Tables)	12 Months Ended
Short-Term Debt and Credit Facilities (Tables)	Dec. 31, 2022
Short-term Debt [Abstract]
Schedule of Line of Credit Facilities	The following table presents information regarding the Registrants' revolving credit agreements at December 31, 2022. Entity Aggregate Commitment Amount Outstanding (A) Weighted-Average Interest Rate Expiration (In millions) OGE Energy (B) $ 550.0 $ — — (F) December 17, 2027 (G) OGE Energy (C) 50.0 — — (F) May 24, 2025 OG&E (D)(E) 550.0 0.4 1.15 % (F) December 17, 2027 (G) Total $ 1,150.0 $ 0.4 1.15 % (A) Includes direct borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit at December 31, 2022 . (B) This bank facility is available to back up OGE Energy's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility. (C) See Note 9 for further information about this revolving credit facility. (D) This bank facility is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility. (E) OG&E has an intercompany borrowing agreement with OGE Energy whereby OG&E has access to up to $ 450.0 million of OGE Energy's revolving credit amount. This agreement has a termination date of December 17, 2027. At December 31, 2022 , there were $ 84.1 million in intercompany borrowings under this agreement. (F) Represents the weighted-average interest rate for the outstanding borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit. (G) In December 2021, the Registrants entered into unsecured five-year revolving credit agreements totaling $ 1.1 billion. Each of the revolving credit facilities contained an option, which could be exercised up to two times, to extend the term of the respective facility for an additional year. In December 2022, the Registrants each entered into an amendment to their credit facility that extends the term of each credit facility for one year, until December 2027 . Further, each credit facility amendment gives each of the Registrants the option of extending such commitments for up to two additional one-year periods.

Retirement Plans and Postreti_2

Retirement Plans and Postretirement Benefit Plans (Tables)	12 Months Ended
Retirement Plans and Postretirement Benefit Plans (Tables)	Dec. 31, 2022
Retirement Plans and Postretirement Benefit Plans [Abstract]
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets	The details of the funded status of OGE Energy's Pension Plan, the Restoration of Retirement Income Plan and the postretirement benefit plans and the amounts included in the balance sheets for 2022 and 2021 are included in the following tables. These amounts have been recorded in Accrued Benefit Obligations with the offset in Accumulated Other Comprehensive Loss (except OG&E's portion, which is recorded as a regulatory asset as discussed in Note 1) in the balance sheets. The amounts in Accumulated Other Comprehensive Loss and those recorded as a regulatory asset represent a net periodic benefit cost to be recognized in the statements of income in future periods. The benefit obligation for OGE Energy's Pension Plan and the Restoration of Retirement Income Plan represents the projected benefit obligation, while the benefit obligation for the postretirement benefit plans represents the accumulated postretirement benefit obligation. The accumulated postretirement benefit obligation for OGE Energy's Pension Plan and Restoration of Retirement Income Plan differs from the projected benefit obligation in that the former includes no assumption about future compensation levels. OGE Energy's seconded employee contract with Enable was terminated on December 2, 2021. OGE Energy retains the obligations to the balances and accrued benefits of these former employees as of the termination of the contract. OGE Energy OG&E Pension Plan Restoration of Retirement Pension Plan Restoration of Retirement December 31 (In millions) 2022 2021 2022 2021 2022 2021 2022 2021 Change in benefit obligation Beginning obligations $ 502.9 $ 654.6 $ 5.9 $ 7.8 $ 363.2 $ 484.1 $ 0.5 $ 3.0 Service cost 7.6 11.2 1.1 0.8 6.2 7.7 — — Interest cost 15.7 13.3 0.2 0.1 12.1 9.7 — — Plan settlements ( 95.8 ) ( 158.6 ) ( 1.5 ) ( 4.6 ) ( 38.8 ) ( 120.4 ) — ( 2.9 ) Plan amendments — — — 1.4 — — — — Plan curtailments — — — ( 0.1 ) — — — — Actuarial (gains) losses ( 56.9 ) ( 3.5 ) 0.1 0.5 ( 41.3 ) ( 6.0 ) — 0.4 Benefits paid ( 15.0 ) ( 14.1 ) — — ( 12.9 ) ( 11.9 ) — — Ending obligations $ 358.5 $ 502.9 $ 5.8 $ 5.9 $ 288.5 $ 363.2 $ 0.5 $ 0.5 Change in plans' assets Beginning fair value $ 486.0 $ 570.3 $ — $ — $ 353.0 $ 420.3 $ — $ — Actual return on plans' assets ( 82.2 ) 48.4 — — ( 62.4 ) 35.0 — — Employer contributions — 40.0 0.2 4.6 — 30.0 — 2.9 Plan settlements ( 95.8 ) ( 158.6 ) ( 0.2 ) ( 4.6 ) ( 38.8 ) ( 120.4 ) — ( 2.9 ) Benefits paid ( 15.0 ) ( 14.1 ) — — ( 12.9 ) ( 11.9 ) — — Ending fair value $ 293.0 $ 486.0 $ — $ — $ 238.9 $ 353.0 $ — $ — Funded status at end of year $ ( 65.5 ) $ ( 16.9 ) $ ( 5.8 ) $ ( 5.9 ) $ ( 49.6 ) $ ( 10.2 ) $ ( 0.5 ) $ ( 0.5 ) Accumulated postretirement benefit obligation $ 342.7 $ 475.2 $ 4.8 $ 5.4 $ 275.2 $ 341.0 $ 0.4 $ 0.4 For the year ended December 31, 2022, Pension Plan actuarial gains were primarily due to significantly higher discount rates, partially offset by demographic experience and a larger than expected amount of early 2023 lump sum payouts. For the year ended December 31, 2021, Pension Plan actuarial gains were primarily due to favorable demographic experience and a higher discount rate. These gains were partially offset by a difference in lump sum interest rates and the long-term assumption for Enable seconded employee terminations and more retirements and terminations than expected with lump sum payouts. OGE Energy OG&E Postretirement Benefit Plans Postretirement Benefit Plans December 31 (In millions) 2022 2021 2022 2021 Change in benefit obligation Beginning obligations $ 137.3 $ 144.5 $ 102.4 $ 109.5 Service cost 0.2 0.2 0.1 0.1 Interest cost 3.5 3.4 2.7 2.6 Plan curtailments — 1.9 — — Participants' contributions 3.5 3.5 2.4 2.6 Actuarial (gains) losses ( 29.1 ) ( 3.7 ) ( 21.0 ) ( 2.5 ) Benefits paid ( 13.5 ) ( 12.5 ) ( 10.2 ) ( 9.9 ) Ending obligations $ 101.9 $ 137.3 $ 76.4 $ 102.4 Change in plans' assets Beginning fair value $ 44.3 $ 47.6 $ 39.9 $ 42.7 Actual return on plans' assets ( 8.2 ) ( 0.5 ) ( 7.4 ) ( 0.5 ) Employer contributions 6.7 6.2 5.1 5.0 Participants' contributions 3.5 3.5 2.4 2.6 Benefits paid ( 13.5 ) ( 12.5 ) ( 10.2 ) ( 9.9 ) Ending fair value $ 32.8 $ 44.3 $ 29.8 $ 39.9 Funded status at end of year $ ( 69.1 ) $ ( 93.0 ) $ ( 46.6 ) $ ( 62.5 )
Schedule of Defined Benefit Plans Disclosures	The following tables present the net periodic benefit cost components, before consideration of capitalized amounts, of OGE Energy's Pension Plan, Restoration of Retirement Income Plan and postretirement benefit plans that are included in the financial statements. Service cost is presented within Other Operation and Maintenance Expense, and the remaining net period benefit cost components as listed in the following tables are presented within Other Net Periodic Benefit Income (Expense) in the statements of income. OG&E recovers specific amounts of pension and postretirement medical costs in rates approved in its Oklahoma rate reviews. In accordance with approved orders, OG&E defers the difference between actual pension and postretirement medical expenses and the amount approved in its last Oklahoma rate review as a regulatory asset or regulatory liability. These amounts have been recorded in the Pension tracker in the regulatory assets and liabilities table in Note 1 and within Other Net Periodic Benefit Income (Expense) in the statements of income. OGE Energy Pension Plan Restoration of Retirement Year Ended December 31 (In millions) 2022 2021 2020 2022 2021 2020 Service cost $ 7.6 $ 11.2 $ 13.2 $ 1.1 $ 0.8 $ 0.8 I nter e st cost 15.7 13.3 17.0 0.2 0.1 0.2 Expected return on plan assets ( 25.4 ) ( 34.1 ) ( 37.6 ) — — — Amortizatio n of net loss 8.9 9.4 17.1 0.2 0.2 0.5 Plan curta il ments — — — — — 0.2 Special termination benefits — — 7.6 — — — Amortization of unrecognized prior service cost (A) — — — 0.2 0.1 — Settlement cost 30.6 41.3 14.1 0.3 2.1 2.7 Total net periodic benefit cost 37.4 41.1 31.4 2.0 3.3 4.4 Less: Amount paid by unconsolidated affiliates — ( 0.2 ) 2.0 — 0.1 0.1 Net periodic benefit cost $ 37.4 $ 41.3 $ 29.4 $ 2.0 $ 3.2 $ 4.3 (a) Unamortized prior service cost is amortized on a straight-line basis over the average remaining service period to the first eligibility age of participants who are expected to receive a benefit and are active at the date of the plan amendment. OG&E Pension Plan Restoration of Retirement Year Ended December 31 (In millions) 2022 2021 2020 2022 2021 2020 Service cost $ 6.2 $ 7.7 $ 9.2 $ — $ — $ 0.1 Inte r est cost 12.1 9.7 12.6 — — 0.1 Expected return on plan assets ( 19.6 ) ( 24.7 ) ( 27.9 ) — — — Amortization of net loss 7.4 7.0 12.1 — 0.1 0.4 Special termination benefits — — 5.1 — — — Settlement cost 12.9 33.1 11.4 — 1.6 2.4 Total net periodic benefit cost 19.0 32.8 22.5 — 1.7 3.0 Plus: Amount allocated from OGE Energy 5.2 6.5 5.9 1.5 1.5 1.3 Net periodic benefit cost $ 24.2 $ 39.3 $ 28.4 $ 1.5 $ 3.2 $ 4.3 In addition to the net periodic benefit cost amounts recognized, as presented in the table above, for the Pension and Restoration of Retirement Income Plans in 2022, 2021 and 2020, the Registrants recognized the following: Year Ended December 31 (In millions) 2022 2021 2020 Increase of regulatory asset related to pension expense to maintain allowed recoverable amount in Oklahoma jurisdiction (A) $ 15.2 $ 23.0 $ 13.8 Deferral of pension expense related to pension settlement, curtailment and special termination benefits charges included in the above line item: Oklahoma jurisdiction (A) $ 15.4 $ 37.9 $ 21.6 Arkansas jurisdiction (A) $ 1.4 $ 3.5 $ 2.0 (A) Included in the pension regulatory asset in each jurisdiction, as indicated in the regulatory assets and liabilities table in Note 1. OGE Energy OG&E Postretirement Benefit Plans Postretirement Benefit Plans Year Ended December 31 (In millions) 2022 2021 2020 2022 2021 2020 Service cost $ 0.2 $ 0.2 $ 0.2 $ 0.1 $ 0.1 $ 0.2 Interest cost 3.5 3.4 4.2 2.7 2.6 3.2 Expected return on plan assets ( 1.8 ) ( 1.8 ) ( 1.8 ) ( 1.6 ) ( 1.7 ) ( 1.7 ) Amortization of net loss 1.5 2.8 2.0 1.5 2.7 2.1 Plan curtai l ments — — 1.5 — — 1.3 Amortization of unrecognized prior service cost (A) ( 3.8 ) ( 6.9 ) ( 8.4 ) ( 3.6 ) ( 5.0 ) ( 6.1 ) Total net periodic benefit income ( 0.4 ) ( 2.3 ) ( 2.3 ) ( 0.9 ) ( 1.3 ) ( 1.0 ) Less: Amount paid by unconsolidated affiliates (B) — ( 0.5 ) ( 0.7 ) Plus: Amount allocated from OGE Energy (B) — ( 0.5 ) ( 0.5 ) Net periodic benefit income $ ( 0.4 ) $ ( 1.8 ) $ ( 1.6 ) $ ( 0.9 ) $ ( 1.8 ) $ ( 1.5 ) (A) Unamortized prior service cost is amortized on a straight-line basis over the average remaining service period to the first eligibility age of participants who are expected to receive a benefit and are active at the date of the plan amendment. (B) "Amount paid by unconsolidated affiliates" is only applicable to OGE Energy. "Amount allocated from OGE Energy" is only applicable to OG&E. In addition to the net periodic benefit income amounts recognized, as presented in the table above, for the postretirement benefit plans in 2022, 2021 and 2020, the Registrants recognized the following: Year Ended December 31 (In millions) 2022 2021 2020 Increase (decrease) of regulatory liability related to postretirement expense to maintain allowed recoverable amount in Oklahoma jurisdiction (A) $ ( 0.6 ) $ 0.4 $ 1.6 Deferral of postretirement expense related to postretirement plan curtailment charges included in the above line item: Oklahoma jurisdiction (A) $ — $ — $ ( 1.4 ) Arkansas jurisdiction (A) $ — $ — $ ( 0.1 ) (A) Included in the pension regulatory asset or liability in each jurisdiction, as indicated in the regulatory assets and liabilities table in Note 1.
Schedule of Capitalized Pension and Postretirement Cost	The following table presents the amount of net periodic benefit cost capitalized and attributable to each of the Registrants for OGE Energy's Pension Plan and postretirement benefit plans in 2022, 2021 and 2020. OGE Energy OG&E (In millions) 2022 2021 2020 2022 2021 2020 Capitalized portion of net periodic pension benefit cost $ 3.0 $ 3.4 $ 3.8 $ 2.5 $ 2.9 $ 3.1 Capitalized portion of net periodic postretirement benefit cost $ 0.2 $ 0.2 $ 0.2 $ 0.1 $ 0.1 $ 0.1
Schedule of Assumptions Used	Rate Assumptions Pension Plan and Postretirement Year Ended December 31 2022 2021 2020 2022 2021 2020 Assumptions to determine benefit obligations: Discount rate 5.45 % 2.75 % 2.30 % 5.40 % 2.80 % 2.45 % Rate of compensation increase 4.20 % 4.20 % 4.20 % N/A N/A N/A Interest crediting rate 3.50 % 3.50 % 3.50 % N/A N/A N/A Assumptions to determine net periodic benefit cost: Discount rate 4.01 % 2.63 % 2.88 % 2.80 % 2.45 % 3.25 % Expected return on plan assets 7.00 % 7.00 % 7.50 % 4.00 % 4.00 % 4.00 % Rate of compensation increase 4.20 % 4.20 % 4.20 % N/A N/A N/A Interest crediting rate 3.50 % 3.50 % 4.00 % N/A N/A N/A N/A - not applicable
Projected Benefit Obligation Funded Status Thresholds	The Pension Plan assets are held in a trust which follows an investment policy and strategy designed to reduce the funded status volatility of the Plan by utilizing liability driven investing. The purpose of liability-driven investing is to structure the asset portfolio to more closely resemble the pension liability and thereby more effectively hedge against changes in the liability. The investment policy follows a glide path approach that shifts a higher portfolio weighting to fixed income as the Plan's funded status increases. The following table presents the targeted fixed income and equity allocations at different funded status levels. Projected Benefit Obligation Funded Status Thresholds <90% 95% 100% 105% 110% 115% 120% Fixed income 50 % 58 % 65 % 73 % 80 % 85 % 90 % Equity 50 % 42 % 35 % 27 % 20 % 15 % 10 % Total 100 % 100 % 100 % 100 % 100 % 100 % 100 %
Pension Plan Equity Asset Allocation Table	Within the portfolio's overall allocation to equities, the funds are allocated according to the guidelines in the following table. Asset Class Target Allocation Minimum Maximum Domestic Large Cap Equity 40 % 35 % 60 % Domestic Mid-Cap Equity 15 % 5 % 25 % Domestic Small-Cap Equity 25 % 5 % 30 % International Equity 20 % 10 % 30 %
Schedule of Allocation of Plan Assets	The following tables present the postretirement benefit plans' investments that are measured at fair value on a recurring basis at December 31, 2022 and 2021 . There were no Level 2 investments held by the postretirement benefit plans at December 31, 2022 and 2021. (In millions) December 31, 2022 Level 1 Level 3 Group retiree medical insurance contract $ 21.6 $ — $ 21.6 Mutual funds 11.2 11.2 — Total OGE Energy plan investments $ 32.8 $ 11.2 $ 21.6 Plan investments attributable to affiliates ( 3.0 ) Total OG&E plan investments $ 29.8 (In millions) December 31, 2021 Level 1 Level 3 Group retiree medical insurance contract $ 28.1 $ — $ 28.1 Mutual funds 16.2 16.2 — Total OGE Energy plan investments $ 44.3 $ 16.2 $ 28.1 Plan investments attributable to affiliates ( 4.4 ) Total OG&E plan investments $ 39.9
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets	The following table presents a reconciliation of the postretirement benefit plans' investments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3). Year Ended December 31 (In millions) 2022 Group retiree medical insurance contract: Beginning balance $ 28.1 Claims paid ( 4.8 ) Net unrealized losses related to instruments held at the reporting date ( 1.8 ) Investment fees ( 0.1 ) Realized losses ( 0.6 ) Interest income 0.7 Dividend income 0.1 Ending balance $ 21.6
Schedule of Expected Benefit Payments	The following table presents the benefit payments the Registrants expect to pay related to the Pension Plan and Restoration of Retirement Income Plan. These expected benefits are based on the same assumptions used to measure OGE Energy's benefit obligation at the end of the year and include benefits attributable to estimated future employee service. (In millions) OGE Energy OG&E 2023 $ 92.0 $ 80.1 2024 $ 29.4 $ 23.1 2025 $ 27.7 $ 21.8 2026 $ 28.9 $ 23.0 2027 $ 35.1 $ 21.3 2028-2032 $ 128.6 $ 99.7 The Medicare Prescription Drug, Improvement and Modernization Act of 2003 expanded coverage for prescription drugs. The following table presents the gross benefit payments the Registrants expect to pay related to the postretirement benefit plans, including prescription drug benefits. (In millions) OGE Energy OG&E 2023 $ 12.0 $ 9.1 2024 $ 11.7 $ 8.9 2025 $ 10.0 $ 7.5 2026 $ 9.5 $ 7.1 2027 $ 8.9 $ 6.7 After 2027 $ 37.0 $ 27.8
Defined Benefit Plan, Plan Assets, Category	The following tables present the Pension Plan's investments that are measured at fair value on a recurring basis at December 31, 2022 and 2021 . There were no Level 3 investments held by the Pension Plan at December 31, 2022 and 2021. (In millions) December 31, 2022 Level 1 Level 2 Net Asset Value (A) Common stocks $ 71.9 $ 71.9 $ — $ — U.S. Treasury notes and bonds (B) 44.6 44.6 — — Mortgage- and asset-backed securities 26.2 — 26.2 — Corporate fixed income and other securities 65.5 — 65.5 — Commingled fund (C) 18.2 — — 18.2 Foreign government bonds 0.5 — 0.5 — U.S. municipal bonds 0.9 — 0.9 — Money market fund 5.9 — — 5.9 Mutual fund 60.4 60.4 — — Preferred stocks 1.5 1.5 — — U.S. Treasury futures: Cash collateral 0.3 0.3 — — Forward contracts: Receivable (foreign currency) 0.1 — 0.1 — Total Pension Plan investments 296.0 $ 178.7 $ 93.2 $ 24.1 Interest and dividends receivable 1.6 Receivable from broker for securities sold 20.6 Payable to broker for securities purchased ( 25.2 ) Total OGE Energy Pension Plan assets $ 293.0 Pension Plan investments attributable to affiliates ( 54.1 ) Total OG&E Pension Plan assets $ 238.9 (In millions) December 31, 2021 Level 1 Level 2 Net Asset Value (A) Common stocks $ 86.1 $ 86.1 $ — $ — U.S. Treasury notes and bonds (B) 135.2 135.2 — — Mortgage- and asset-backed securities 24.6 — 24.6 — Corporate fixed income and other securities 107.0 — 107.0 — Commingled fund (C) 23.6 — — 23.6 Foreign government bonds 0.9 — 0.9 — U.S. municipal bonds 1.4 — 1.4 — Money market fund 5.5 — — 5.5 Mutual fund 99.8 99.8 — — Preferred stocks 1.1 1.1 — — U.S. Treasury futures: Cash collateral 0.6 0.6 — — Forward contracts: Receivable (foreign currency) 0.1 — 0.1 — Total Pension Plan investments 485.9 $ 322.8 $ 134.0 $ 29.1 Interest and dividends receivable 2.1 Payable to broker for securities purchased ( 2.0 ) Total OGE Energy Pension Plan assets $ 486.0 Pension Plan investments attributable to affiliates ( 133.0 ) Total OG&E Pension Plan assets $ 353.0 (A) GAAP allows the measurement of certain investments that do not have a readily determinable fair value at the net asset value. These investments do not consider the observability of inputs; therefore, they are not included within the fair value hierarchy. (B) This category represents U.S. Treasury notes and bonds with a Moody's Investors Service rating of Aaa and Government Agency Bonds with a Moody's Investors Service rating of A1 or higher. (C) This category represents units of participation in a commingled fund that primarily invested in stocks of international companies and emerging markets.

Report of Business Segments (Ta

Report of Business Segments (Tables)	12 Months Ended
Report of Business Segments (Tables)	Dec. 31, 2022
Segment Reporting [Abstract]
Summary of OGE Energy's Business Segments	The following tables present the results of OGE Energy's business segments for the years ended December 31, 2022, 2021 and 2020. 2022 Electric Company Natural Gas Midstream Operations Other Eliminations Total (In millions) Operating revenues $ 3,375.7 $ — $ — $ — $ 3,375.7 Fuel, purchased power and direct transmission expense 1,662.4 — — — 1,662.4 Other operation and maintenance 491.9 12.6 ( 3.1 ) — 501.4 Depreciation and amortization 460.9 — — — 460.9 Taxes other than income 98.0 0.1 3.4 — 101.5 Operating income (loss) 662.5 ( 12.7 ) ( 0.3 ) — 649.5 Gain on equity securities — 282.1 — — 282.1 Other income (expense) 11.2 10.0 4.9 ( 2.1 ) 24.0 Interest expense 157.8 — 10.6 ( 2.1 ) 166.3 Income tax expense (benefit) 76.4 48.1 ( 0.9 ) — 123.6 Net income (loss) $ 439.5 $ 231.3 $ ( 5.1 ) $ — $ 665.7 Total assets $ 12,410.5 $ 1.2 $ 683.7 $ ( 550.7 ) $ 12,544.7 Capital expenditures $ 1,050.9 $ — $ — $ — $ 1,050.9 2021 Electric Company Natural Gas Midstream Operations Other Eliminations Total (In millions) Operating revenues $ 3,653.7 $ — $ — $ — $ 3,653.7 Fuel, purchased power and direct transmission expense 2,127.6 — — — 2,127.6 Other operation and maintenance 464.7 1.6 ( 3.2 ) — 463.1 Depreciation and amortization 416.0 — — — 416.0 Taxes other than income 99.3 0.2 3.3 — 102.8 Operating income (loss) 546.1 ( 1.8 ) ( 0.1 ) — 544.2 Equity in earnings of unconsolidated affiliates — 169.8 — — 169.8 Gain on Enable/Energy Transfer transaction, net — 344.4 — — 344.4 Other income (expense) 7.7 ( 26.4 ) ( 2.0 ) ( 0.9 ) ( 21.6 ) Interest expense 152.0 — 7.2 ( 0.9 ) 158.3 Income tax expense (benefit) 41.8 101.0 ( 1.6 ) — 141.2 Net income (loss) $ 360.0 $ 385.0 $ ( 7.7 ) $ — $ 737.3 Total assets $ 11,688.0 $ 786.6 $ 350.3 $ ( 218.5 ) $ 12,606.4 Capital expenditures $ 778.5 $ — $ — $ — $ 778.5 2020 Electric Company Natural Gas Midstream Operations Other Eliminations Total (In millions) Operating revenues $ 2,122.3 $ — $ — $ — $ 2,122.3 Fuel, purchased power and direct transmission expense 644.6 — — — 644.6 Other operation and maintenance 464.4 1.7 ( 3.3 ) — 462.8 Depreciation and amortization 391.3 — — — 391.3 Taxes other than income 97.2 0.4 3.8 — 101.4 Operating income (loss) 524.8 ( 2.1 ) ( 0.5 ) — 522.2 Equity in losses of unconsolidated affiliates (A) — ( 668.0 ) — — ( 668.0 ) Other income (expense) 4.1 ( 2.9 ) 3.6 ( 1.6 ) 3.2 Interest expense 154.8 — 5.3 ( 1.6 ) 158.5 Income tax expense (benefit) 34.7 ( 158.0 ) ( 4.1 ) — ( 127.4 ) Net income (loss) $ 339.4 $ ( 515.0 ) $ 1.9 $ — $ ( 173.7 ) Investment in unconsolidated affiliates $ — $ 374.3 $ — $ — $ 374.3 Total assets $ 10,489.0 $ 378.1 $ 116.4 $ ( 264.7 ) $ 10,718.8 Capital expenditures $ 650.5 $ — $ — $ — $ 650.5 (A) In March 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable .

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
Commitments and Contingencies (Tables)	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Unrecorded Unconditional Purchase Obligations Disclosure	The following table presents the Registrants' future purchase obligations and commitments estimated for the next five years. (In millions) 2023 2024 2025 2026 2027 Total Purchase obligations and commitments: Minimum purchase commitments $ 110.0 $ 92.2 $ 66.4 $ 24.6 $ 24.6 $ 317.8 Expected wind purchase commitments 56.0 56.6 56.9 57.3 57.7 284.5 Long-term service agreement commitments 2.7 14.5 2.8 17.1 23.8 60.9 Total purchase obligations and commitments $ 168.7 $ 163.3 $ 126.1 $ 99.0 $ 106.1 $ 663.2
Schedule of Wind Purchased Power	The following table presents OG&E's wind purchased power contracts. Company Location Original Term of Expiration of MWs CPV Keenan Woodward County, OK 20 years 2030 152.0 Edison Mission Energy Dewey County, OK 20 years 2031 130.0 NextEra Energy Blackwell, OK 20 years 2032 60.0 The following table presents a summary of OG&E's wind power purchases for the years ended December 31, 2022, 2021 and 2020. Year Ended December 31 (In millions) 2022 2021 2020 CPV Keenan $ 25.8 $ 27.3 $ 27.5 Edison Mission Energy 24.9 21.7 22.8 NextEra Energy 7.3 6.8 7.0 Total wind power purchased $ 58.0 $ 55.8 $ 57.3

Schedule II (Tables)

Schedule II (Tables)	12 Months Ended
Schedule II (Tables)	Dec. 31, 2022
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II Valuation and Qualifying Accounts	Additions Description Balance at Beginning of Period Charged to Costs and Expenses Deductions (A) Balance at End of Period (In millions) Balance at December 31, 2020 Reserve for Uncollectible Accounts $ 1.5 $ 3.0 $ 1.9 $ 2.6 Balance at December 31, 2021 Reserve for Uncollectible Accounts $ 2.6 $ 3.2 $ 3.4 $ 2.4 Balance at December 31, 2022 Reserve for Uncollectible Accounts $ 2.4 $ 2.8 $ 3.3 $ 1.9 (A) Uncollectible accounts receivable written off, net of recoveries.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Schedule of Regulatory Assets and Liabilities (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021
Schedule of Regulatory Assets and Liabilities [Line Items]
Fuel clause under recoveries		$ 514.9	$ 151.9
Regulatory Assets, Current		527.3	182.6
Regulatory Assets, Noncurrent		524.3	1,230.8
Regulatory Liability, Current		5.5	2.5
Regulatory Liability, Noncurrent		1,147.1	1,231.1
OKLAHOMA
Schedule of Regulatory Assets and Liabilities [Line Items]
Fuel clause under recoveries		474.3	140.4
ARKANSAS
Schedule of Regulatory Assets and Liabilities [Line Items]
Fuel clause under recoveries		40.6	11.5
SPP cost tracker under recovery [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Liability, Current	[1]	3	0
Accrued removal obligations [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Liability, Noncurrent		250.5	296.8
Pension tracker [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets, Noncurrent		57.2	42.9
Other Regulatory Liabilities [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Liability, Current	[1]	2.5	2.5
Regulatory Liability, Noncurrent		1.9	3.6
Oklahoma Energy Efficiency Rider Under Recovery
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets, Current	[2]	7.7	11.7
Benefit obligations regulatory asset [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets, Noncurrent		119.7	109.2
Deferred storm expenses [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets, Noncurrent		206.3	172.8
Unamortized loss on reacquired debt [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets, Noncurrent		8	8.9
Deferred Pension Expenses [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets, Noncurrent		12.3	12.1
Dry Scrubber Regulatory Asset [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets, Noncurrent		18.1	18.9
Other Regulatory Assets [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets, Current	[2]	4.7	19
Regulatory Assets, Noncurrent		11.6	14.3
Income taxes recoverable from customers, net [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Liability, Noncurrent		894.7	930.7
Deferred Plant Expense
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets, Noncurrent		5.2	6.7
COVID-19 Deferred Expenses
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets, Noncurrent		7.7	8.2
Winter Storm Uri Costs \| OKLAHOMA
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets, Noncurrent		0	747.9
Winter Storm Uri Costs \| ARKANSAS
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets, Noncurrent		$ 78.2	$ 88.9

[1] Included in Other Current Liabilities in the balance sheets. Included in Other Current Assets in the balance sheets.

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)		1 Months Ended	9 Months Ended	11 Months Ended		12 Months Ended
	Dec. 02, 2021	Dec. 31, 2021	Sep. 30, 2022	Dec. 02, 2021		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred Storm and Property Reserve Deficiency, Current						$ 2,700,000
Allowance for Doubtful Accounts Receivable		$ 2,400,000				$ 1,900,000	$ 2,400,000
Provision for Depreciation Rate						2.70%	2.60%
Projected provision for depreciation in next fiscal year						2.70%
Percent Of Intangible Plant Balance Amortizable						43.10%
Percent of Intangible Plant Balance Amortizable						56.30%
Amortization of intangible assets, period						6 years 8 months 12 days
Amortization of Intangible Assets, Period						13 years 9 months 18 days
Amortization of Intangible Assets, Period						22 years 4 months 24 days
Percent of Intangible Plant Balance Amortizable Thereafter						0.60%
Accrued Environmental Loss Contingencies, Noncurrent		25,800,000				$ 24,200,000	$ 25,800,000
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration]						Other Liabilities, Noncurrent
Public Utilities, Allowance for Funds Used During Construction, Rate						4.80%	7.40%	7.30%
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party						$ 135,500,000	$ 139,300,000	$ 140,600,000
Equity Securities Sold During Period			95,400,000
Proceeds from Sales of Equity Securities			$ 1,067,200,000
Increase (Decrease) in Debt Securities, Trading, and Equity Securities, FV-NI						282,100,000
Distributions received						34,000,000
Equity in earnings of unconsolidated affiliates				$ 169,800,000	[1]	0	169,800,000	(668,000,000)	[1],[2]
Gain (Loss) on Disposition of Assets						0	344,400,000	0
Proceeds from Sales of Assets, Investing Activities	$ 35,000,000
Fees paid from disposition of assets	$ 8,600,000
Expected Settlement Charge						5,100,000
Excluding Fuel Purchases [Member]
Accounts receivable - unconsolidated affiliates		300,000					300,000
Enable Midstream Partners [Member]
Investment Owned, Balance, Shares	110,982,805			110,982,805
Distributions received							73,400,000	91,700,000
Gas Transmission Equipment [Member]
Amount of Acquisition Adjustments						$ 3,300,000
Gas Transmission Equipment [Member] \| Minimum [Member]
Amortization of intangible assets, period						37 years
Gas Transmission Equipment [Member] \| Maximum [Member]
Amortization of intangible assets, period						59 years
Redbud Plant [Member]
Amortization of intangible assets, period						27 years
Amount of Acquisition Adjustments		148,300,000				$ 148,300,000	148,300,000
OG&E [Member]
Allowance for Doubtful Accounts Receivable		2,400,000				1,900,000	2,400,000
Capitalized Computer Software, Gross		103,700,000				143,200,000	103,700,000
Capitalized Computer Software, Amortization						$ 23,500,000	18,100,000	14,900,000
OG&E [Member] \| Minimum [Member]
Asset Retirement Obligations Accreted, Period						5 years
OG&E [Member] \| Maximum [Member]
Asset Retirement Obligations Accreted, Period						68 years
OG&E [Member] \| Retained Earnings [Member]
Dividends, Common Stock						$ 0	265,000,000	325,000,000
OGE Energy [Member]
Investment Owned, Balance, Shares	95,389,721			95,389,721
Unrealized Gain (Loss) on Investments		(8,600,000)				0
Gain (Loss) on Disposition of Assets	$ 344,400,000
OGE Energy [Member] \| Enable Midstream Partners [Member] \| Operating Costs Charged [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party				$ 300,000				400,000
OGE Energy [Member] \| Enable Midstream Partners [Member] \| Employment Costs [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party							12,200,000	$ 17,300,000
Energy Transfer
Proceeds from Sales of Assets, Investing Activities	5,000,000
CenterPoint [Member]
Proceeds from Sales of Assets, Investing Activities	$ 30,000,000
Public Utilities, Inventory, Fuel [Member]
Fuel inventories		$ 40,600,000				$ 108,800,000	$ 40,600,000

[1] For the year ended December 31, 2020, Enable recorded a $ 225.0 million impairment on an equity method investment, which ran through OGE Energy's portion of Enable net income and was offset by basis differences that flow through the amortization of basis difference and dilution recognition line item above. In March 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Summary of Components of Benefit Obligation (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Regulatory Assets, Noncurrent	$ 524.3	$ 1,230.8
Pension Plan [Member] \| Defined Benefit Plans Income Loss [Member]
Components of Benefit Obligation Regulatory Asset	110	89.6
Other Postretirement Benefits Plan [Member] \| Prior Service Cost [Member]
Components of Benefit Obligation Regulatory Asset	0	(3.6)
Other Postretirement Benefits Plan [Member] \| Defined Benefit Plans Income Loss [Member]
Components of Benefit Obligation Regulatory Asset	9.7	23.2
Benefit obligations regulatory asset [Member]
Regulatory Assets, Noncurrent	$ 119.7	$ 109.2

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Schedule of Jointly Owned Utility Plants (Details) - USD ($) $ in Millions	Dec. 31, 2022		Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 15,131.3		$ 14,151.8
Accumulated Depreciation	4,584.5		4,318.9
Net property, plant and equipment	$ 10,546.8		$ 9,832.9
McClain Plant [Member]
Property, Plant and Equipment [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	77%	[1]	77%	[2]
Property, Plant and Equipment, Gross	$ 261.9	[1]	$ 258.5	[2]
Accumulated Depreciation	119.4	[1]	109	[2]
Net property, plant and equipment	$ 142.5	[1]	$ 149.5	[2]
Redbud Plant [Member]
Property, Plant and Equipment [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	51%	[1],[3]	51%	[2],[4]
Property, Plant and Equipment, Gross	$ 542.1	[1],[3]	$ 538.2	[2],[4]
Accumulated Depreciation	225.2	[1],[3]	203.4	[2],[4]
Net property, plant and equipment	316.9	[1],[3]	334.8	[2],[4]
OGE Energy [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	6.1		6.1
Accumulated Depreciation	0		0
Net property, plant and equipment	6.1		6.1
OG&E [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	15,125.2		14,145.7
Accumulated Depreciation	4,584.5		4,318.9
Net property, plant and equipment	10,540.7		9,826.8
OG&E [Member] \| Total Property Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	15,125.2		14,145.7
Accumulated Depreciation	4,584.5		4,318.9
Net property, plant and equipment	10,540.7		9,826.8
OG&E [Member] \| Electric Transmission and Distribution [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	5,781.3		5,225.8
Accumulated Depreciation	1,527.1		1,477.5
Net property, plant and equipment	4,254.2		3,748.3
OG&E [Member] \| Electric Generation Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	5,188.1	[5]	5,037.9	[6]
Accumulated Depreciation	1,982.7	[5]	1,839	[6]
Net property, plant and equipment	3,205.4	[5]	3,198.9	[6]
OG&E [Member] \| Electric Transmission [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,180.5	[7]	3,038.2	[8]
Accumulated Depreciation	667.9	[7]	627	[8]
Net property, plant and equipment	2,512.6	[7]	2,411.2	[8]
OG&E [Member] \| Finite-Lived Intangible Assets, Major Class Name [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	384		301.1
Accumulated Depreciation	193.6		171.7
Net property, plant and equipment	190.4		129.4
OG&E [Member] \| Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	591.3		542.7
Accumulated Depreciation	213.2		203.7
Net property, plant and equipment	$ 378.1		$ 339

[1] Construction work in progress was $ 0.7 million and $ 1.5 million for the McClain and Redbud Plants, respectively. Construction work in progress was $ 0.2 million and $0.2 million for the McClain and Redbud Plants, respectively. This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 78.2 million. This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 72.8 million. This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 78.3 million. This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 72.8 million. This amount includes a plant acquisition adjustment of $ 3.3 million and accumulated amortization of $ 1.0 million. This amount includes a plant acquisition adjustment of $ 3.3 million and accumulated amortization of $ 0.9 million.

Summary of Significant Accoun_8

Summary of Significant Accounting Policies Property - Summary of OG&E's Ownership Interest in Jointly-owned Plant (Parenthetical) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
McClain Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0.7	$ 0.2
Redbud Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	1.5	0.2
Amount of Acquisition Adjustments	148.3	148.3
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments, Related Accumulated Depreciation	$ 78.2	$ 72.8

Summary of Significant Accoun_9

Summary of Significant Accounting Policies Property - Summary of Property Plant and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2022		Dec. 31, 2021
Public Utility, Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 15,131.3		$ 14,151.8
Accumulated Depreciation	4,584.5		4,318.9
Net property, plant and equipment	10,546.8		9,832.9
OG&E [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	15,125.2		14,145.7
Accumulated Depreciation	4,584.5		4,318.9
Net property, plant and equipment	10,540.7		9,826.8
OG&E [Member] \| Electric Generation Equipment [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	5,188.1	[1]	5,037.9	[2]
Accumulated Depreciation	1,982.7	[1]	1,839	[2]
Net property, plant and equipment	3,205.4	[1]	3,198.9	[2]
OG&E [Member] \| Electric Transmission [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,180.5	[3]	3,038.2	[4]
Accumulated Depreciation	667.9	[3]	627	[4]
Net property, plant and equipment	2,512.6	[3]	2,411.2	[4]
OG&E [Member] \| Finite-Lived Intangible Assets, Major Class Name [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	384		301.1
Accumulated Depreciation	193.6		171.7
Net property, plant and equipment	190.4		129.4
OG&E [Member] \| Property, Plant and Equipment, Other Types [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	591.3		542.7
Accumulated Depreciation	213.2		203.7
Net property, plant and equipment	378.1		339
OG&E [Member] \| Total Property Plant and Equipment [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	15,125.2		14,145.7
Accumulated Depreciation	4,584.5		4,318.9
Net property, plant and equipment	10,540.7		9,826.8
OGE Energy [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	6.1		6.1
Accumulated Depreciation	0		0
Net property, plant and equipment	$ 6.1		$ 6.1

[1] This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 78.3 million. This amount includes a plant acquisition adjustment of $ 148.3 million and accumulated amortization of $ 72.8 million. This amount includes a plant acquisition adjustment of $ 3.3 million and accumulated amortization of $ 1.0 million. This amount includes a plant acquisition adjustment of $ 3.3 million and accumulated amortization of $ 0.9 million.

Summary of Significant Accou_10

Summary of Significant Accounting Policies Property - Summary of Property Plant and Equipment (Parenthetical) (Details) - OG&E [Member] - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Electric Generation Equipment [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Amount of Acquisition Adjustments	$ 148.3	$ 148.3
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments, Related Accumulated Depreciation	78.3	72.8
Electric Transmission [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Amount of Acquisition Adjustments	3.3	3.3
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments, Related Accumulated Depreciation	$ 1	$ 0.9

Summary of Significant Accou_11

Summary of Significant Accounting Policies - Summary of Changes to Asset Retirement Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at January 1	$ 80.2	$ 79.6
Accretion expense	0.6	0.6
Liabilities settled	(2.5)	0
Balance at December 31	$ 78.3	$ 80.2

Summary of Significant Accou_12

Summary of Significant Accounting Policies - Summary of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss)	$ 1.4	$ 0.4
Settlement cost	13.6	6	$ 2.2
Net current period other comprehensive income (loss)	12.9	7.3	(4.2)
Accumulated other comprehensive loss, net of tax	(24.8)	(32.1)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(2.1)	0.9
Accumulated other comprehensive loss, net of tax	(11.9)	(24.8)	(32.1)
Net current period other comprehensive income (loss)	12.9	7.3	(4.2)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net current period other comprehensive income (loss)	(0.2)	(1.4)
Defined Benefit Plans Income Loss [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated other comprehensive income (loss)	(24.9)	(33.9)
Other comprehensive income (loss) before reclassifications	(7.6)	1.4
Amounts reclassified from accumulated other comprehensive income (loss)	1.4	1.6
Net current period other comprehensive income (loss)	7.4	9
Accumulated other comprehensive income (loss)	(17.5)	(24.9)	(33.9)
Defined Benefit Plans Income Loss [Member] \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated other comprehensive income (loss)	1.1	1.7
Other comprehensive income (loss) before reclassifications	5.5	(0.7)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0.1
Net current period other comprehensive income (loss)	5.5	(0.6)
Accumulated other comprehensive income (loss)	6.6	1.1	1.7
Defined Benefit Plan Prior Service Cost [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated other comprehensive income (loss)	(1.2)	(0.2)
Other comprehensive income (loss) before reclassifications	0	(1.1)
Amounts reclassified from accumulated other comprehensive income (loss)	0.2	0.1
Net current period other comprehensive income (loss)	0.2	(1)
Accumulated other comprehensive income (loss)	(1)	(1.2)	(0.2)
Defined Benefit Plan Prior Service Cost [Member] \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated other comprehensive income (loss)	0.2	1.6
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	(0.2)	(1.4)
Accumulated other comprehensive income (loss)	0	0.2	1.6
Commodity Contract [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
AOCI, Derivative Qualifying as Hedge, Excluded Component, after Tax	0	(1.3)
AOCI, Derivative Qualifying as Hedge, Excluded Component, after Tax	0	0	$ (1.3)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	1.3
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Net current period other comprehensive income (loss)	0	1.3
Settlement Cost [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlement cost	13.6	6
Settlement Cost [Member] \| Defined Benefit Plans Income Loss [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlement cost	13.6	6
Settlement Cost [Member] \| Defined Benefit Plan Prior Service Cost [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlement cost	0	0
Settlement Cost [Member] \| Defined Benefit Plan Prior Service Cost [Member] \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlement cost	0	0
Settlement Cost [Member] \| Commodity Contract [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlement cost	$ 0	$ 0

Summary of Significant Accou_13

Summary of Significant Accounting Policies - Summary of Amount Reclassified Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent		$ (15)	$ (6.4)
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	[1]	(1.6)	(2.5)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	[1]	(0.3)	(0.1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax	[1]	(17.9)	(8.7)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax		19.8	(11.3)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax		(4.6)	(3.6)
Amounts reclassified from accumulated other comprehensive income (loss)		(15.2)	(7.7)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	[1]	(0.3)	(0.1)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	[1]	0	(0.1)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	[1]	0.3	1.8
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax		0.3	1.7
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax		0.1	0.4
Amounts reclassified from accumulated other comprehensive income (loss)		0.2	1.3
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	[1]	$ 0.3	$ 1.8

[1] These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost (see Note 11 for additional information).

Summary of Significant Accou_14

Summary of Significant Accounting Policies - Summarized Balance Sheet Information for Equity Method Investment (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 02, 2021
Summarized Financial Information of Equity Method Investment [Line Items]
Current assets	$ 1,340.8	$ 613.6
Current liabilities	$ 1,802.2	$ 1,089.6
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Summarized Financial Information of Equity Method Investment [Line Items]
Current assets			$ 594
Non-current assets			11,227
Current liabilities			1,254
Non-current liabilities			$ 3,281

Summary of Significant Accou_15

Summary of Significant Accounting Policies - Summarized Income Statement Information for Equity Method Investment (Details) - USD ($) $ in Millions	11 Months Ended	12 Months Ended
	Dec. 02, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Total revenues		$ 3,375.7	$ 3,653.7	$ 2,122.3
Net income (loss)		$ 665.7	$ 737.3	(173.7)
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule of Equity Method Investments [Line Items]
Total revenues	$ 3,466			2,463
Cost of natural gas and NGLs (excluding depreciation and amortization)	1,959			965
Operating income	634			465
Net income (loss)	$ 461			$ 52

Summary of Significant Accou_16

Summary of Significant Accounting Policies - Reconciliation of Equity in Earnings (Losses) of Unconsolidated Affiliates (Details) - USD ($) $ in Millions			11 Months Ended		12 Months Ended
		Mar. 31, 2020	Dec. 02, 2021		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
NET INCOME (LOSS)					$ 665.7	$ 737.3	$ (173.7)
Timing Differences Related to Equity Method Investee Net Income			$ 9				0
Proportionate Unconsolidated Affiliate Net Income			119.8				13.2
Amortization of basis difference and dilution recognition	[1]		50				98.8
Equity Method Investment, Other than Temporary Impairment		$ (780)	0	[2]			(780)	[2]
Equity in earnings of unconsolidated affiliates			$ 169.8	[3]	$ 0	$ 169.8	$ (668)	[3],[4]
OGE Holdings [Member]
Schedule of Equity Method Investments [Line Items]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest			25.50%				25.50%
Equity Method Investment Nonconsolidated Investees [Member]
Schedule of Equity Method Investments [Line Items]
Equity in earnings of unconsolidated affiliates			$ 470				$ 52
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule of Equity Method Investments [Line Items]
NET INCOME (LOSS)			$ 461				52
OGE Energy [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Other than Temporary Impairment							$ (225)

[1] Includes loss on dilution, net of proportional basis difference recognition. During the year ended December 31, 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable as, effective March 31, 2020, OGE estimated the fair value of its investment in Enable was below the book value and concluded the decline in value was not temporary. For the year ended December 31, 2020, Enable recorded a $ 225.0 million impairment on an equity method investment, which ran through OGE Energy's portion of Enable net income and was offset by basis differences that flow through the amortization of basis difference and dilution recognition line item above. In March 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable

Summary of Significant Accou_17

Summary of Significant Accounting Policies - Reconciliation of Equity in Earnings (Losses) of Unconsolidated Affiliates (Parenthetical) (Details) - USD ($) $ in Millions		11 Months Ended		12 Months Ended
	Mar. 31, 2020	Dec. 02, 2021		Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Other than Temporary Impairment	$ 780	$ 0	[1]	$ 780	[1]

[1] During the year ended December 31, 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable as, effective March 31, 2020, OGE estimated the fair value of its investment in Enable was below the book value and concluded the decline in value was not temporary.

Summary of Significant Accou_18

Summary of Significant Accounting Policies Property - Schedule of Related Party Transactions (Details) - Og and E [Member] - Enable Midstream Partners [Member] - USD ($) $ in Millions	11 Months Ended	12 Months Ended
	Dec. 02, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Revenue from Related Parties	$ 13.3	$ 15.1
Natural Gas Transportation [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Purchases from Related Party	32.7	32.8
Natural Gas Purchases [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Purchases and Sales from Related Party	$ (33.5)	$ 2.7

Accounting Pronouncements - Add

Accounting Pronouncements - Additional Information (Details) - Winter Storm Uri $ in Millions	1 Months Ended
	Nov. 30, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Government assistance amount	$ 750
Government Assistance, Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of Goods and Services Sold

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 3,304.2	$ 3,588.7	$ 2,069.8
Provision for Rate Refund
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	(1.2)	0	3.8
Integrated Market
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	163.8	468.9	49.6
Transmission
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	131.7	140.2	143.3
Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	20.8	1.1	30.7
Residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	1,272.6	1,309.1	842.7
Commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	803.5	749.2	465.6
Industrial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	317.2	323	192.6
Oilfield
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	304.2	312.8	169.2
Public Authority and Street Light
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	291.6	284.4	172.3
System Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 2,989.1	$ 2,978.5	$ 1,842.4

Leases - Additional Information

Leases - Additional Information (Details) $ in Millions	Dec. 31, 2022 USD ($)
Operating Leased Assets [Line Items]
Lessee, Operating Lease, Contingent Liability	$ 6.8
Minimum [Member] \| OG&E Wind Farm Land Lease Agreements [Member]
Operating Leased Assets [Line Items]
Operating lease, term of contract	25 years
Maximum [Member] \| OG&E Wind Farm Land Lease Agreements [Member]
Operating Leased Assets [Line Items]
Operating lease, term of contract	30 years

Leases - Schedule of Financial

Leases - Schedule of Financial Statement Information of Lease Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Leased Assets [Line Items]
Operating lease cost		$ 5.9	$ 6.3	$ 6.4
Operating cash flows for operating leases		5.3	6.3	6.4
Right-of-use assets obtained in exchange for new operating lease liabilities		1.5	0	1.4
Right-of-use assets at period end	[1]	$ 30.2	$ 33
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]		Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Operating lease liabilities at period end	[2]	$ 34.8	$ 37.6
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]		Liabilities, Other than Long-term Debt, Noncurrent	Liabilities, Other than Long-term Debt, Noncurrent
Operating lease weighted-average remaining lease term (in years)		11 years 7 months 6 days	12 years 2 months 12 days
Operating lease weighted-average discount rate		4%	3.90%
OG&E [Member]
Operating Leased Assets [Line Items]
Operating lease cost		$ 5.9	$ 5.7	5.5
Operating cash flows for operating leases		5.3	5.7	5.5
Right-of-use assets obtained in exchange for new operating lease liabilities		1.5	0	$ 1.4
Right-of-use assets at period end	[1]	$ 30.2	$ 33
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]		Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Operating lease liabilities at period end	[2]	$ 34.8	$ 37.6
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]		Liabilities, Other than Long-term Debt, Noncurrent	Liabilities, Other than Long-term Debt, Noncurrent
Operating lease weighted-average remaining lease term (in years)		11 years 7 months 6 days	12 years 2 months 12 days
Operating lease weighted-average discount rate		4%	3.90%

[1] Included in Property, Plant and Equipment in the Registrants' balance sheets. Included in Other Deferred Credits and Other Liabilities in the Registrants' balance sheets.

Leases - Schedule of Maturity A

Leases - Schedule of Maturity Analysis of Operating Lease Liabilities (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021
Operating Leased Assets [Line Items]
2023		$ 5.7
2024		3.7
2025		3.5
2026		3
2027		3
Thereafter		25.7
Total future minimum lease payments		44.6
Less: Imputed interest		9.8
Present value of net minimum lease payments	[1]	34.8	$ 37.6
OG&E [Member]
Operating Leased Assets [Line Items]
2023		5.7
2024		3.7
2025		3.5
2026		3
2027		3
Thereafter		25.7
Total future minimum lease payments		44.6
Less: Imputed interest		9.8
Present value of net minimum lease payments	[1]	$ 34.8	$ 37.6

[1] Included in Other Deferred Credits and Other Liabilities in the Registrants' balance sheets.

Investment in Unconsolidated _2

Investment in Unconsolidated Affiliate (Details) - USD ($) $ / shares in Units, $ in Millions			11 Months Ended		12 Months Ended
	Dec. 02, 2021	Mar. 31, 2020	Dec. 02, 2021		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020		Jun. 30, 2022
Schedule of Equity Method Investments [Line Items]
Distributions received					$ 34
Equity in earnings (losses) of unconsolidated affiliates			$ 169.8	[1]	0	$ 169.8	$ (668)	[1],[2]
Share Price									$ 38.56
Equity Method Investment, Other than Temporary Impairment		$ 780	$ 0	[3]			780	[3]
Gain (Loss) on Disposition of Assets					$ 0	344.4	0
Proceeds from Sales of Assets, Investing Activities	$ 35
Fees paid from disposition of assets	$ 8.6
OGE Energy [Member]
Schedule of Equity Method Investments [Line Items]
Investment Owned, Balance, Shares	95,389,721		95,389,721
Equity Method Investment, Other than Temporary Impairment							225
Gain (Loss) on Disposition of Assets	$ 344.4
CenterPoint [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Sales of Assets, Investing Activities	30
Energy Transfer
Schedule of Equity Method Investments [Line Items]
Proceeds from Sales of Assets, Investing Activities	$ 5
Natural Gas Midstream Operations [Member]
Schedule of Equity Method Investments [Line Items]
Equity in earnings (losses) of unconsolidated affiliates						169.8	$ (668)	[2]
Gain (Loss) on Disposition of Assets						$ 344.4

[1] For the year ended December 31, 2020, Enable recorded a $ 225.0 million impairment on an equity method investment, which ran through OGE Energy's portion of Enable net income and was offset by basis differences that flow through the amortization of basis difference and dilution recognition line item above. In March 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable During the year ended December 31, 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable as, effective March 31, 2020, OGE estimated the fair value of its investment in Enable was below the book value and concluded the decline in value was not temporary.

Related Party Disclosures (Deta

Related Party Disclosures (Details) - USD ($)	11 Months Ended	12 Months Ended
Related Party Disclosures (Details) - USD ($)	Dec. 02, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party		$ 135,500,000	$ 139,300,000	$ 140,600,000
Expected Settlement Charge		5,100,000
Excluding Fuel Purchases [Member]
Related Party Transaction [Line Items]
Accounts receivable - unconsolidated affiliates			300,000
Og and E [Member] \| Retained Earnings
Related Party Transaction [Line Items]
Dividends, Common Stock		$ 0	(265,000,000)	(325,000,000)
Enable Midstream Partners [Member] \| Og and E [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	$ 13,300,000			15,100,000
Enable Midstream Partners [Member] \| Og and E [Member] \| Natural Gas Transportation [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Purchases from Related Party	32,700,000			32,800,000
Enable Midstream Partners [Member] \| OGE Energy [Member] \| Operating Costs Charged [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	$ 300,000			400,000
Enable Midstream Partners [Member] \| OGE Energy [Member] \| Employment Costs [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party			$ 12,200,000	$ 17,300,000

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Financial Instrument Measured at Fair Value On A Recurring Basis and Carrying Amount and Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	$ 4,548.6	$ 4,496.4
Redeemable Noncontrolling Interest, Equity, Carrying Amount	0	785.1
Equity Securities, FV-NI, Current	0	785.1
OGE Energy Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	499.9	499.9
Long-Term Debt, Fair Value	491.2	497.8
OGE Energy Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	49.8	0
Long-Term Debt, Fair Value	50	0
OG&E Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	3,854.2	3,851.8
Long-Term Debt, Fair Value	3,477.1	4,460.2
OG&E Industrial Authority Bonds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	135.4	135.4
Long-Term Debt, Fair Value	135.4	135.4
OG&E Tinker Debt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	9.3	9.3
Long-Term Debt, Fair Value	$ 7.3	$ 10

Stock Based Compensation - Addi

Stock Based Compensation - Additional Information (Details) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Stock-Based Compensation [Abstract]
Number of Shares Authorized	8,417,755
Treasury Stock, Shares, Acquired			405,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted			247,252
Number of treasury stock used		154,523
New common stock shares issued	27,278

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Pre-tax Compensation Expense and Related Income Tax Benefit (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 9.7	$ 9.8	$ 9.8
Income tax benefit	2.3	2.5	2.5
OG&E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	2.9	2.2	3
Income tax benefit	0.7	0.6	0.8
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	7.2	7.5	8.9
Performance Units [Member] \| OG&E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	2.2	1.8	2.6
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	2.5	2.3	0.9
Restricted Stock Units (RSUs) [Member] \| OG&E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	0.7	0.4	0.4
Total Shareholder Return [Member] \| Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	7.2	7.5	7.9
Total Shareholder Return [Member] \| Performance Units [Member] \| OG&E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	2.2	1.8	2.3
Performance Units Related to Earnings Per Share [Member] \| Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	0	0	1	[1]
Performance Units Related to Earnings Per Share [Member] \| Performance Units [Member] \| OG&E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 0	$ 0	$ 0.3	[1]

[1] In 2019, the Compensation Committee of OGE Energy's Board of Directors voted to grant restricted stock units in lieu of performance units based on earnings per share. The final grants of performance units based on earnings per share vested as of December 31, 2020 and were paid out in March 2021.

Stock-Based Compensation - Perf

Stock-Based Compensation - Performance Units Total Shareholder Return Valuation Assumptions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted			247,252
Total Shareholder Return [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	216,437	249,909	201,552
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 41.10	$ 38.14	$ 38.03
Expected Dividend Rate	4.80%	4.70%	3.50%
Expected Volatility Rate	29%	29%	15%
Risk Free Interest Rate	1.71%	0.22%	1.17%
Expected Term	2 years 10 months 6 days	2 years 10 months 2 days	2 years 10 months 6 days
Total Shareholder Return [Member] \| Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	60,923	68,720	67,975
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 41.10	$ 38.14	$ 38.03
Expected Dividend Rate	4.80%	4.70%	3.50%
Expected Volatility Rate	29%	29%	15%
Risk Free Interest Rate	1.71%	0.22%	1.17%
Expected Term	2 years 10 months 6 days	2 years 10 months 6 days	2 years 10 months 6 days

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock Valuation Assumptions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted			247,252
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	116,539	89,197	67,193
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 35.72	$ 31.11	$ 43.69
Restricted Stock [Member] \| Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	32,804	22,911	22,665
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 35.72	$ 30.91	$ 43.69

Stock-Based Compensation - Shar

Stock-Based Compensation - Share-based Compensation, Activity (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted				247,252
Equity Instruments Other than Options, Forfeited in Period		(16,566)
Total Shareholder Return [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		216,437	249,909	201,552
Total Shareholder Return [Member] \| Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		60,923	68,720	67,975
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Beginning Balance		581,252
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	[1]	216,437
Equity Instruments Other than Options, Converted in Period	[2]	(172,748)
Equity Instruments Other than Options, Vested in Period		(161,690)
Equity Instruments Other than Options, Forfeited in Period		(16,566)
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance		608,375	581,252
Awards Other than Options, Fully Vested	[3]	161,690
Equity Instruments Other than Options, Converted, Aggregrate Intrinsic Value		$ 0
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value		34.1
Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested		$ 3.7
Performance Units [Member] \| Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Beginning Balance		161,310
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	[1]	60,923
Equity Instruments Other than Options, Converted in Period	[2]	(48,195)
Equity Instruments Other than Options, Vested in Period		(44,550)
Equity Instruments Other than Options, Forfeited in Period		(4,217)
Equity Other Than Options, Employee Migration	[4]	802
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance		170,623	161,310
Awards Other than Options, Fully Vested	[3]	44,550
Equity Instruments Other than Options, Converted, Aggregrate Intrinsic Value		$ 0
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value		9.6
Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested		$ 1
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Beginning Balance		133,671
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		116,539	89,197	67,193
Equity Instruments Other than Options, Vested in Period		(47,995)
Equity Instruments Other than Options, Forfeited in Period		(12,732)
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance		189,483	133,671
Equity Instruments Other than Options, Vested, Aggregrate Intrinsic Value		$ 1.9
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value		$ 7.5
Restricted Stock [Member] \| Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Beginning Balance		35,613
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		32,804	22,911	22,665
Equity Instruments Other than Options, Vested in Period		(11,807)
Equity Instruments Other than Options, Forfeited in Period		(4,342)
Equity Other Than Options, Employee Migration	[4]	491
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance		52,759	35,613
Equity Instruments Other than Options, Vested, Aggregrate Intrinsic Value		$ 0.5
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value		$ 2.1

[1] For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from zero percent to 200 percent of the target. These amounts represent performance units that were canceled at December 31, 2021 due to the performance metric threshold not being met. These amounts represent performance units that vested at December 31, 2022. Actual expected amounts to be paid out in 2023 will differ based on the percentage at which the performance metric was met and are dependent upon Compensation Committee approval. Due to certain employees transferring between OG&E and OGE Energy.

Stock-Based Compensation - Sh_2

Stock-Based Compensation - Share-based Compensation, Activity (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum payout range	0%
Maximum payout range	200%

Stock-Based Compensation - Sc_2

Stock-Based Compensation - Schedule of Nonvested Share Activity (Details) - $ / shares		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted				247,252
Equity Instruments Other than Options, Forfeited in Period		(16,566)
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Nonvested, Number, Beginning Balance		408,504
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	[1]	216,437
Equity Instruments Other than Options, Vested in Period		(161,690)
Equity Instruments Other than Options, Forfeited in Period		(16,566)
Equity Instruments Other than Options, Nonvested, Number, Ending Balance		446,685	408,504
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance		$ 38.05
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		41.10
Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value		38.04
Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value		39.45
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Ending Balance		$ 39.53	$ 38.05
Performance Units [Member] \| Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Nonvested, Number, Beginning Balance		113,115
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	[1]	60,923
Equity Instruments Other than Options, Vested in Period		(44,550)
Equity Instruments Other than Options, Forfeited in Period		(4,217)
Equity Other Than Options, Employee Migration	[2]	802
Equity Instruments Other than Options, Nonvested, Number, Ending Balance		126,073	113,115
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance		$ 38.10
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		41.10
Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value		38.03
Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value		39.96
Equity Other Than Options, Employee Migration, Weighted Average Grant Date Fair Value		42.18
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Ending Balance		$ 39.53	$ 38.10
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Nonvested, Number, Beginning Balance		133,671
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		116,539	89,197	67,193
Equity Instruments Other than Options, Vested in Period		(47,995)
Equity Instruments Other than Options, Forfeited in Period		(12,732)
Equity Instruments Other than Options, Nonvested, Number, Ending Balance		189,483	133,671
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance		$ 35.64
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		35.72	$ 31.11	$ 43.69
Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value		39.63
Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value		35.95
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Ending Balance		$ 33.75	$ 35.64
Restricted Stock [Member] \| Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Nonvested, Number, Beginning Balance		35,613
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		32,804	22,911	22,665
Equity Instruments Other than Options, Vested in Period		(11,807)
Equity Instruments Other than Options, Forfeited in Period		(4,342)
Equity Other Than Options, Employee Migration	[2]	491
Equity Instruments Other than Options, Nonvested, Number, Ending Balance		52,759	35,613
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance		$ 35.52
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		35.72	$ 30.91	$ 43.69
Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value		39.71
Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value		35.93
Equity Other Than Options, Employee Migration, Weighted Average Grant Date Fair Value		34.83
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Ending Balance		$ 33.78	$ 35.52

[1] For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from zero percent to 200 percent of the target. Due to certain employees transferring between OG&E and OGE Energy.

Stock-Based Compensation - Sc_3

Stock-Based Compensation - Schedule of Nonvested Share Activity (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum payout range	0%
Maximum payout range	200%

Stock-Based Compensation - Fair

Stock-Based Compensation - Fair Value of Vested Performance Units and Restricted Stock (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Total Shareholder Return [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value of Vested Performance Units and Restricted Stock	$ 6.2	$ 8.1	$ 8.7
Total Shareholder Return [Member] \| Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value of Vested Performance Units and Restricted Stock	1.7	2.3	2.8
Performance Units Related to Earnings Per Share [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value of Vested Performance Units and Restricted Stock	0	0	2.5
Performance Units Related to Earnings Per Share [Member] \| Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value of Vested Performance Units and Restricted Stock	0	0	0.8
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value of Vested Performance Units and Restricted Stock	2.1	2.2	0.1
Restricted Stock [Member] \| Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value of Vested Performance Units and Restricted Stock	$ 0.5	$ 0.5	$ 0.1

Stock-Based Compensation - Sc_4

Stock-Based Compensation - Schedule of Unrecognized Compensation Cost, Nonvested Awards (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Compensation Cost Not yet Recognized	$ 11.2
Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Compensation Cost Not yet Recognized	2.9
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Compensation Cost Not yet Recognized	$ 7.7
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 7 months 28 days
Performance Units [Member] \| Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Compensation Cost Not yet Recognized	$ 2.2
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 7 months 24 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Compensation Cost Not yet Recognized	$ 3.5
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 9 months 3 days
Restricted Stock [Member] \| Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Compensation Cost Not yet Recognized	$ 0.7
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 9 months 7 days

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Taxes [Line Items]
Current Federal Tax Expense (Benefit)	$ 250.8	$ 16.4	$ 8.4
Current State and Local Tax Expense (Benefit)	28.8	1.7	0.5
Current Income Tax Expense (Benefit)	279.6	18.1	8.9
Deferred Federal Income Tax Expense (Benefit)	(110.8)	133.1	(105.2)
Deferred State and Local Income Tax Expense (Benefit)	(45.2)	(10)	(31.1)
Deferred Income Tax Expense (Benefit)	(156)	123.1	(136.3)
Income Tax Expense (Benefit)	123.6	141.2	(127.4)
Og and E [Member]
Income Taxes [Line Items]
Current Federal Tax Expense (Benefit)	(141.2)	(9)	(3.8)
Current State and Local Tax Expense (Benefit)	(0.9)	9	(0.6)
Current Income Tax Expense (Benefit)	(142.1)	0	(4.4)
Deferred Federal Income Tax Expense (Benefit)	219.9	58.3	45.7
Deferred State and Local Income Tax Expense (Benefit)	(1.4)	(16.5)	(6.6)
Deferred Income Tax Expense (Benefit)	218.5	41.8	39.1
Income Tax Expense (Benefit)	$ 76.4	$ 41.8	$ 34.7

Income Taxes - Schedule of Effe

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Taxes [Line Items]
Statutory federal tax rate		21%	21%	21%
State income taxes, net of federal income tax benefit		(1.00%)	0.90%	(1.40%)
Stock-based compensation		0%	0.10%	(0.30%)
Executive compensation limitation		0.10%	0.10%	0.20%
Amortization of net unfunded deferred taxes		(3.20%)	(2.10%)	(4.40%)
Federal renewable energy credit	[1]	0%	(2.00%)	(5.00%)
Remeasurement of state deferred taxes due to Energy Transfer merger	[2]	0%	(1.10%)	0%
Remeasurement of state deferred tax liabilities		(0.60%)	(0.60%)	0.90%
401(k) dividends		(0.20%)	(0.20%)	(0.40%)
Impairment of OGE Energy's investment in Enable	[3]	0%	0%	31.60%
Other		(0.40%)	0%	0.10%
Effective income tax rate		15.70%	16.10%	42.30%
Og and E [Member]
Income Taxes [Line Items]
Statutory federal tax rate		21%	21%	21%
State income taxes, net of federal income tax benefit		(0.40%)	(1.40%)	(1.60%)
Stock-based compensation		0%	0%	0%
Executive compensation limitation		0%	0%
Amortization of net unfunded deferred taxes		(5.00%)	(4.60%)	(4.80%)
Federal renewable energy credit	[1]	0%	(4.40%)	(5.40%)
Remeasurement of state deferred taxes due to Energy Transfer merger	[2]	0%	0%	0%
Remeasurement of state deferred tax liabilities		0%	0%	0%
401(k) dividends		0%	0%	0%
Impairment of OGE Energy's investment in Enable	[3]	0%	0%	0%
Other		(0.80%)	(0.20%)	0.10%
Effective income tax rate		14.80%	10.40%	9.30%

[1] Represents credits primarily associated with the production from OG&E's wind farms. In connection with the Enable and Energy Transfer merger, the state income tax rates were expected to decrease, as Energy Transfer operates in significantly more states with generally lower tax rates than the historic Enable operating area. As discussed in Note 1, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable in March 2020, which resulted in a tax benefit being recorded that caused a significant variance to the effective tax rate. This variance has been presented in the table as a single line item in order to facilitate comparability of other components of the effective tax rate.

Income Taxes - Schedule of Ef_2

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) (Parenthetical) (Details) - USD ($) $ in Millions		11 Months Ended		12 Months Ended
	Mar. 31, 2020	Dec. 02, 2021		Dec. 31, 2020
Income Taxes [Line Items]
Equity Method Investment, Other than Temporary Impairment	$ 780	$ 0	[1]	$ 780	[1]

[1] During the year ended December 31, 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable as, effective March 31, 2020, OGE estimated the fair value of its investment in Enable was below the book value and concluded the decline in value was not temporary.

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Income Taxes [Line Items]
Accelerated depreciation and other property related differences	$ 1,714.5	$ 1,677.3
Investment in Energy Transfer's equity securities	0	363.5
Regulatory assets	54.8	52.1
Pension Plan	18	10.7
Other	(5.1)	7.4
Derivative instruments	2.4	2.2
Bond redemption-unamortized costs	1.6	1.8
Income taxes recoverable from customers, net	(216.7)	(225.8)
State tax credits	(221.2)	(221.2)
Federal tax credits	0	(208.4)
Regulatory liabilities	(60.8)	(72)
Asset retirement obligations	(18.8)	(19.4)
Postretirement medical and life insurance benefits	(19.2)	(19.2)
Accrued liabilities	(11.2)	(9.5)
Deferred federal investment tax credits	(2.9)	(3.1)
Net operating losses	0	(1)
Accrued vacation	(1.4)	(1.5)
Uncollectible accounts	(0.5)	(0.6)
Deferred Income Tax Liabilities, Net, Total	1,233.5	1,333.3
Og and E [Member]
Income Taxes [Line Items]
Accelerated depreciation and other property related differences	1,714.5	1,677.3
Investment in Energy Transfer's equity securities	0	0
Regulatory assets	54.7	52.1
Pension Plan	35.4	32
Other	(5.8)	(4.7)
Derivative instruments	0	0
Bond redemption-unamortized costs	1.6	1.8
Income taxes recoverable from customers, net	(216.7)	(225.8)
State tax credits	(208.5)	(205.9)
Federal tax credits	0	(209.8)
Regulatory liabilities	(60.8)	(72)
Asset retirement obligations	(18.8)	(19.4)
Postretirement medical and life insurance benefits	(12.7)	(13)
Accrued liabilities	(7.3)	(7.3)
Deferred federal investment tax credits	(2.9)	(3.1)
Net operating losses	0	0
Accrued vacation	(1.1)	(1.2)
Uncollectible accounts	(0.5)	(0.6)
Deferred Income Tax Liabilities, Net, Total	$ 1,271.1	$ 1,000.4

Income Taxes (Additional Inform

Income Taxes (Additional Information) (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Unrecognized Tax Benefits	$ 20,700,000	$ 22,400,000	$ 21,900,000	$ 20,700,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0	0	0
Research and Development Credits [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Amount	1,700,000
Og and E [Member]
Income Taxes [Line Items]
Unrecognized Tax Benefits	16,400,000	18,100,000	$ 17,600,000
OGE Energy [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance		$ 0
Deferred Tax Asset [Member]
Income Taxes [Line Items]
Unrecognized Tax Benefits	16,400,000
Deferred Tax Asset [Member] \| OGE Energy [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 2,700,000

Income Taxes - Schedule of Unre

Income Taxes - Schedule of Unrecognized Tax Benefits Roll Forward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Taxes [Line Items]
Unrecognized Tax Benefits, Beginning Balance	$ 22.4	$ 21.9	$ 20.7
Additions	0	1.7	1.2
Reductions	(1.7)	(1.2)	0
Unrecognized Tax Benefits, Ending Balance	$ 20.7	$ 22.4	$ 21.9

Income Taxes - Summary of Tax C

Income Taxes - Summary of Tax Credit Carryforwards (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Income Taxes [Line Items]
Tax Credit Carryforward, Deferred Tax Asset	$ 0	$ 208.4
State tax credits	(221.2)	(221.2)
Og and E [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Deferred Tax Asset	0	209.8
State tax credits	(208.5)	$ (205.9)
Oklahoma investment tax credits [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Amount	242.8
State tax credits	191.8
Oklahoma investment tax credits [Member] \| Og and E [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Amount	226.7
State tax credits	179.1
Oklahoma capital investment board credits [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Amount	12.8
State tax credits	12.8
Oklahoma capital investment board credits [Member] \| Og and E [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Amount	12.8
State tax credits	12.8
Oklahoma zero emission tax credits [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Amount	22.6
State tax credits	16.6
Oklahoma zero emission tax credits [Member] \| Og and E [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Amount	22.6
State tax credits	$ 16.6

Common Equity - Automatic Divid

Common Equity - Automatic Dividend Reinvestment and Stock Purchase Plan (Additional Information) (Details)	12 Months Ended
	Dec. 31, 2022 shares
Stock Issued During Period, Shares, New Issues	27,278
Automatic Dividend Reinvestment and Stock Purchase Plan [Member]
Stock Issued During Period, Shares, New Issues	0
Shares Held in Reserve Related to Dividend Reinvestment Plan and Stock Purchase Plan	3,932,647

Common Equity - Schedule of Ear

Common Equity - Schedule of Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income attributable to OGE Energy	$ 665.7	$ 737.3	$ (173.7)
Basic Average Common Shares Outstanding	200.2	200.1	200.1
Contingently Issuable Shares (Performance and Restricted Stock Units)	0.6	0.2	0
Diluted Average Common Shares Outstanding	200.8	200.3	200.1
Basic earnings (loss) per average common share	$ 3.33	$ 3.68	$ (0.87)
Diluted earnings (loss) per average common share	$ 3.32	$ 3.68	$ (0.87)
Anti-dilutive shares excluded from earnings per share calculation	0	0	0.3
Og and E [Member]
Net income attributable to OGE Energy	$ 439.5	$ 360	$ 339.4
Retained Earnings [Member]
Net income attributable to OGE Energy	665.7	737.3	(173.7)
Retained Earnings [Member] \| Og and E [Member]
Net income attributable to OGE Energy	$ 439.5	$ 360	$ 339.4

Common Equity - Dividends Restr

Common Equity - Dividends Restriction (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Preferred Stock, Shares Outstanding	0
Stock Issued During Period, Shares, New Issues	27,278
OGE Energy [Member]
Ratio of Consolidated Debt to Consolidated Capitalization	65%
Retained Earnings, Restricted	$ 816.9
Retained Earnings, Unrestricted	$ 2,500
OGE Energy [Member] \| Maximum [Member]
Ratio of Consolidated Debt to Consolidated Capitalization	70%
Og and E [Member]
Ratio of Consolidated Debt to Consolidated Capitalization	65%
Retained Earnings, Restricted	$ 579.3
Retained Earnings, Unrestricted	$ 2,900
Stock Issued During Period, Shares, New Issues	0	0	0

Long-Term Debt (Additional Info

Long-Term Debt (Additional Information) (Details)		1 Months Ended	12 Months Ended
Long-Term Debt (Additional Information) (Details)		May 31, 2022 USD ($)	Dec. 31, 2022 USD ($)		Jan. 31, 2023 USD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Percent of Principal Amount Subject to Optional Tender			100%
Debt Instrument, Maturity Date			Dec. 31, 2027
Line of Credit Facility, Maximum Borrowing Capacity			$ 1,150,000,000
Long-term Debt, Weighted Average Interest Rate, at Point in Time		3.48%
OG&E [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months			500,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Three			79,400,000
Long-term Debt, Maturities, Repayments of Principal in Year Five			181,000,000
Line of Credit Facility, Maximum Borrowing Capacity						$ 1,100,000,000
Line of Credit Facility, Current Borrowing Capacity	[1],[2]		$ 550,000,000
Maturity	[1],[2],[3]		Dec. 17, 2027
OGE Energy [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months			$ 1,000,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Three			129,400,000
Long-term Debt, Maturities, Repayments of Principal in Year Five			181,000,000
Line of Credit Facility, Current Borrowing Capacity		$ 550,000,000	$ 550,000,000	[4]
Maturity	[3],[4]		Dec. 17, 2027
OGE Energy [Member] \| Series Due August 15, 2028 [Member]
Debt Instrument [Line Items]
Long term debt		100,000,000
Line of Credit Facility, Maximum Borrowing Capacity		$ 135,000,000
Debt Instrument Maximum Leverage Ratio		0.65
OGE Energy [Member] \| Credit Facility [Member] \| Series Due August 15, 2028 [Member]
Debt Instrument [Line Items]
Long term debt		$ 50,000,000
OGE Energy [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity	[5]		$ 50,000,000
Maturity		May 24, 2025	May 24, 2025	[5]
OGE Energy [Member] \| Term Loan [Member] \| Series Due August 15, 2028 [Member]
Debt Instrument [Line Items]
Long term debt		$ 50,000,000
Senior Notes [Member] \| OG&E [Member] \| Series Due August 15, 2028 [Member]
Debt Instrument [Line Items]
Long term debt			$ 400,000,000			400,000,000
Senior Notes [Member] \| OG&E [Member] \| Senior Notes due January 15, 2033 [Member]
Debt Instrument [Line Items]
Long term debt					$ 450,000,000
Debt Instrument, Interest Rate, Stated Percentage					5.40%
Debt Instrument, Maturity Date			Jan. 15, 2033
Senior Notes [Member] \| OG&E [Member] \| Series Due May 26, 2023 [Member]
Debt Instrument [Line Items]
Long term debt			$ 500,000,000			500,000,000
Debt Instrument, Interest Rate, Stated Percentage			0.553%
Debt Instrument, Maturity Date			May 26, 2023
Senior Notes [Member] \| OGE Energy [Member] \| Series Due May 26, 2023 [Member]
Debt Instrument [Line Items]
Long term debt			$ 500,000,000			$ 500,000,000
Debt Instrument, Interest Rate, Stated Percentage			0.703%
Debt Instrument, Maturity Date			May 26, 2023

[1] OG&E has an intercompany borrowing agreement with OGE Energy whereby OG&E has access to up to $ 450.0 million of OGE Energy's revolving credit amount. This agreement has a termination date of December 17, 2027. At December 31, 2022 , there were $ 84.1 million in intercompany borrowings under this agreement. This bank facility is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility. In December 2021, the Registrants entered into unsecured five-year revolving credit agreements totaling $ 1.1 billion. Each of the revolving credit facilities contained an option, which could be exercised up to two times, to extend the term of the respective facility for an additional year. In December 2022, the Registrants each entered into an amendment to their credit facility that extends the term of each credit facility for one year, until December 2027 . Further, each credit facility amendment gives each of the Registrants the option of extending such commitments for up to two additional one-year periods. This bank facility is available to back up OGE Energy's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility. See Note 9 for further information about this revolving credit facility.

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-term Debt Instruments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term Debt	$ 4,548.6	$ 4,496.4
Debt Instrument, Maturity Date	Dec. 31, 2027
Garfield Industrial Authority Bond [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Jan. 01, 2025
Muskogee Industrial Authority Bond Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Jan. 01, 2025
Muskogee Industrial Authority Bond Due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Jun. 01, 2027
Redeemable during the next 12 months
Debt Instrument [Line Items]
Long-term Debt	$ 135.4
OG&E [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 3,998.9	3,996.5
OG&E [Member] \| Garfield Industrial Authority Bond [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Jan. 01, 2025
OG&E [Member] \| Muskogee Industrial Authority Bond Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Jan. 01, 2025
OG&E [Member] \| Muskogee Industrial Authority Bond Due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Jun. 01, 2027
OG&E [Member] \| Redeemable during the next 12 months \| Garfield Industrial Authority Bond [Member]
Debt Instrument [Line Items]
Long term debt	$ 47	47
OG&E [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2025 [Member]
Debt Instrument [Line Items]
Long term debt	32.4	32.4
OG&E [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2027 [Member]
Debt Instrument [Line Items]
Long term debt	$ 56	$ 56
Minimum [Member] \| Redeemable during the next 12 months \| Garfield Industrial Authority Bond [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.11%
Minimum [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.11%
Minimum [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.11%
Minimum [Member] \| OG&E [Member] \| Redeemable during the next 12 months \| Garfield Industrial Authority Bond [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.11%
Minimum [Member] \| OG&E [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.11%
Minimum [Member] \| OG&E [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.11%
Maximum [Member] \| Redeemable during the next 12 months \| Garfield Industrial Authority Bond [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.98%
Maximum [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.95%
Maximum [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.98%
Maximum [Member] \| OG&E [Member] \| Redeemable during the next 12 months \| Garfield Industrial Authority Bond [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.98%
Maximum [Member] \| OG&E [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.95%
Maximum [Member] \| OG&E [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.98%

Short-Term Debt and Credit Fa_3

Short-Term Debt and Credit Facilities - Additional Information (Details) - USD ($)		Dec. 31, 2022		May 31, 2022	Dec. 31, 2021
Line of Credit Facility [Line Items]
Short-term debt		$ 0			$ 486,900,000
Acceleration of Indebtedness of Credit Facility		100,000,000
Nonpayment of Uninsured Judgments		100,000,000
Outstanding Intercompany Borrowings		84,100,000
OGE Energy [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity		$ 550,000,000	[1]	$ 550,000,000
Ratio of Consolidated Debt to Consolidated Capitalization		65%
OGE Energy [Member] \| Minimum [Member]
Line of Credit Facility [Line Items]
Ratio of Consolidated Debt to Consolidated Capitalization		65%
OGE Energy [Member] \| Maximum [Member]
Line of Credit Facility [Line Items]
Ratio of Consolidated Debt to Consolidated Capitalization		70%
OG&E [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	[2],[3]	$ 550,000,000
Short Term Borrowing Capacity That Has Regulatory Approval		$ 1,000,000,000
Ratio of Consolidated Debt to Consolidated Capitalization		65%

[1] This bank facility is available to back up OGE Energy's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility. OG&E has an intercompany borrowing agreement with OGE Energy whereby OG&E has access to up to $ 450.0 million of OGE Energy's revolving credit amount. This agreement has a termination date of December 17, 2027. At December 31, 2022 , there were $ 84.1 million in intercompany borrowings under this agreement. This bank facility is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.

Short-Term Debt and Credit Fa_4

Short-Term Debt and Credit Facilities - Schedule of Line of Credit Facilities (Details) - USD ($)		1 Months Ended	12 Months Ended
		May 31, 2022	Dec. 31, 2022		Dec. 31, 2021
Line of Credit Facility [Line Items]
Aggregate Commitment			$ 1,150,000,000
Line of Credit Outstanding, Amount	[1]		$ 400,000
Weighted - Average Interest Rate	[2]		1.15%
OGE Energy [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity		$ 550,000,000	$ 550,000,000	[3]
Line of Credit Outstanding, Amount	[1],[3]		$ 0
Weighted - Average Interest Rate	[2],[3]		0%
Maturity	[3],[4]		Dec. 17, 2027
OGE Energy [Member] \| Term Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	[5]		$ 50,000,000
Line of Credit Outstanding, Amount	[1],[5]		$ 0
Weighted - Average Interest Rate	[2],[5]		0%
Maturity		May 24, 2025	May 24, 2025	[5]
OG&E [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	[6],[7]		$ 550,000,000
Aggregate Commitment					$ 1,100,000,000
Letters of Credit Outstanding, Amount	[1],[6],[7]		$ 400,000
Weighted - Average Interest Rate	[2],[6],[7]		1.15%
Maturity	[4],[6],[7]		Dec. 17, 2027

[1] Includes direct borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit at December 31, 2022 Represents the weighted-average interest rate for the outstanding borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit. This bank facility is available to back up OGE Energy's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility. In December 2021, the Registrants entered into unsecured five-year revolving credit agreements totaling $ 1.1 billion. Each of the revolving credit facilities contained an option, which could be exercised up to two times, to extend the term of the respective facility for an additional year. In December 2022, the Registrants each entered into an amendment to their credit facility that extends the term of each credit facility for one year, until December 2027 . Further, each credit facility amendment gives each of the Registrants the option of extending such commitments for up to two additional one-year periods. See Note 9 for further information about this revolving credit facility. OG&E has an intercompany borrowing agreement with OGE Energy whereby OG&E has access to up to $ 450.0 million of OGE Energy's revolving credit amount. This agreement has a termination date of December 17, 2027. At December 31, 2022 , there were $ 84.1 million in intercompany borrowings under this agreement. This bank facility is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.

Short-Term Debt and Credit Fa_5

Short-Term Debt and Credit Facilities - Schedule of Line of Credit Facilities (Parenthetical) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Line of Credit Facility [Line Items]
Outstanding Intercompany Borrowings	$ 84,100,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,150,000,000
Debt Instrument, Maturity Date	Dec. 31, 2027
Og and E [Member]
Line of Credit Facility [Line Items]
Intercompany Borrowing Agreement - Maximum Borrowing Capacity	$ 450,000,000
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,100,000,000
Debt Instrument, Term		5 years

Retirement Plans and Postreti_3

Retirement Plans and Postretirement Benefit Plans - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions		$ 40,000,000
Ultimate Health Care Cost Trend Rate	4.50%
Postemployment Benefits Liability	$ 1,800,000	2,000,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	200%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	5%
Defined Contribution Plan, Cost	$ 17,100,000	15,400,000	$ 18,200,000
Maximum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Percentage of increase in annual medical inflation cost	5%
Og and E [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions		30,000,000
Postemployment Benefits Liability	$ 1,300,000	1,500,000
Defined Contribution Plan, Cost	13,900,000	12,000,000	14,300,000
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	$ 6,700,000	6,200,000
Health Care Cost Trend Rate Assumed for Next Fiscal Year	6.25%
Fair Value of Plan Assets	$ 32,800,000	44,300,000	47,600,000
Other Postretirement Benefits Plan [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	0	0
Other Postretirement Benefits Plan [Member] \| Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	21,600,000	28,100,000
Other Postretirement Benefits Plan [Member] \| Og and E [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	5,100,000	5,000,000
Fair Value of Plan Assets	29,800,000	39,900,000	42,700,000
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	0	40,000,000
Fair Value of Plan Assets	293,000,000	486,000,000	$ 570,300,000
Pension Plan [Member] \| Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	$ 0	$ 0

Retirement Plans and Postreti_4

Retirement Plans and Postretirement Benefit Plans - Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Employer contributions		$ 40
Og and E [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Employer contributions		30
Pension Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	$ 502.9	654.6
Service cost	7.6	11.2
Interest cost	15.7	13.3
Plan settlements	(95.8)	(158.6)
Plan amendments	0	0
Plan curtailments	0	0
Actuarial (gains) losses	(56.9)	(3.5)
Benefits paid	(15)	(14.1)
Benefit Obligation, Ending	358.5	502.9	$ 654.6
Pension Plans [Member] \| Og and E [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	363.2	484.1
Service cost	6.2	7.7
Interest cost	12.1	9.7
Plan settlements	(38.8)	(120.4)
Plan amendments	0	0
Plan curtailments	0	0
Actuarial (gains) losses	(41.3)	(6)
Benefits paid	(12.9)	(11.9)
Benefit Obligation, Ending	288.5	363.2	484.1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	353	420.3
Actual return on plans' assets	(62.4)	35
Employer contributions	0	30
Plan settlements	(38.8)	(120.4)
Benefits paid	(12.9)	(11.9)
Fair Value of Plan Assets, Ending	238.9	353	420.3
Funded status at end of year	(49.6)	(10.2)
Accumulated Benefit Obligation	(275.2)	(341)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Service cost	7.6	11.2	13.2
Interest cost	15.7	13.3	17
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	486	570.3
Actual return on plans' assets	(82.2)	48.4
Employer contributions	0	40
Plan settlements	(95.8)	(158.6)
Benefits paid	(15)	(14.1)
Fair Value of Plan Assets, Ending	293	486	570.3
Funded status at end of year	(65.5)	(16.9)
Accumulated Benefit Obligation	(342.7)	(475.2)
Pension Plans, Defined Benefit [Member] \| Og and E [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Service cost	6.2	7.7	9.2
Interest cost	12.1	9.7	12.6
Restoration of Retirement Income Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	5.9	7.8
Service cost	1.1	0.8	0.8
Interest cost	0.2	0.1	0.2
Plan settlements	(1.5)	(4.6)
Plan amendments	0	1.4
Plan curtailments	0	(0.1)
Actuarial (gains) losses	0.1	0.5
Benefits paid	0	0
Benefit Obligation, Ending	5.8	5.9	7.8
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	0	0
Actual return on plans' assets	0	0
Employer contributions	0.2	4.6
Plan settlements	(0.2)	(4.6)
Benefits paid	0	0
Fair Value of Plan Assets, Ending	0	0	0
Funded status at end of year	(5.8)	(5.9)
Accumulated Benefit Obligation	(4.8)	(5.4)
Restoration of Retirement Income Plan [Member] \| Og and E [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	0.5	3
Service cost	0	0	0.1
Interest cost	0	0	0.1
Plan settlements	0	(2.9)
Plan amendments	0	0
Plan curtailments	0	0
Actuarial (gains) losses	0	0.4
Benefits paid	0	0
Benefit Obligation, Ending	0.5	0.5	3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	0	0
Actual return on plans' assets	0	0
Employer contributions	0	2.9
Plan settlements	0	(2.9)
Benefits paid	0	0
Fair Value of Plan Assets, Ending	0	0	0
Funded status at end of year	(0.5)	(0.5)
Accumulated Benefit Obligation	(0.4)	(0.4)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	137.3	144.5
Service cost	0.2	0.2	0.2
Interest cost	3.5	3.4	4.2
Plan curtailments	0	1.9
Participants' contributions	3.5	3.5
Actuarial (gains) losses	(29.1)	(3.7)
Benefits paid	(13.5)	(12.5)
Benefit Obligation, Ending	101.9	137.3	144.5
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	44.3	47.6
Actual return on plans' assets	(8.2)	(0.5)
Employer contributions	6.7	6.2
Participants' contributions	3.5	3.5
Benefits paid	(13.5)	(12.5)
Fair Value of Plan Assets, Ending	32.8	44.3	47.6
Accumulated Benefit Obligation	(69.1)	(93)
Other Postretirement Benefits Plan [Member] \| Og and E [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	102.4	109.5
Service cost	0.1	0.1	0.2
Interest cost	2.7	2.6	3.2
Plan curtailments	0	0
Participants' contributions	2.4	2.6
Actuarial (gains) losses	(21)	(2.5)
Benefits paid	(10.2)	(9.9)
Benefit Obligation, Ending	76.4	102.4	109.5
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	39.9	42.7
Actual return on plans' assets	(7.4)	(0.5)
Employer contributions	5.1	5
Participants' contributions	2.4	2.6
Benefits paid	(10.2)	(9.9)
Fair Value of Plan Assets, Ending	29.8	39.9	$ 42.7
Accumulated Benefit Obligation	$ (46.6)	$ (62.5)

Retirement Plans and Postreti_5

Retirement Plans and Postretirement Benefit Plans - Schedule of Defined Benefit Plans Disclosures (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021		Dec. 31, 2020
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		$ 7.6	$ 11.2		$ 13.2
Interest cost		$ 15.7	$ 13.3		$ 17
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Expected return on plan assets		$ (25.4)	$ (34.1)		$ (37.6)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Amortization of net loss		$ 8.9	$ 9.4		$ 17.1
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Curtailment		$ 0	$ 0		$ 0
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Special termination benefits		$ 0	$ 0		$ 7.6
Amortization of unrecognized prior service cost	[1]	0	0		0
Settlement cost		30.6	41.3		14.1
Total net periodic benefit cost		37.4	41.1		31.4
Less: Amount paid by unconsolidated affiliates		0	(0.2)		2
Net periodic benefit cost		37.4	41.3		29.4
Pension Plan [Member] \| Oklahoma Jurisdiction
Defined Benefit Plan Disclosure [Line Items]
Settlement cost	[2]	15.4	37.9		21.6
Increase (decrease) of regulatory liability related to postretirement expense to maintain allowed recoverable amount in Oklahoma jurisdiction	[2]	15.2	23		13.8
Pension Plan [Member] \| Arkansas Jurisdiction
Defined Benefit Plan Disclosure [Line Items]
Settlement cost		1.4	3.5	[2]	2	[2]
Pension Plan [Member] \| Og and E [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		6.2	7.7		9.2
Interest cost		$ 12.1	$ 9.7		$ 12.6
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Expected return on plan assets		$ (19.6)	$ (24.7)		$ (27.9)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Amortization of net loss		$ 7.4	$ 7		$ 12.1
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Special termination benefits		$ 0	$ 0		$ 5.1
Settlement cost		12.9	33.1		11.4
Total net periodic benefit cost		19	32.8		22.5
Amount Attributable to Parent		5.2	6.5		5.9
Net periodic benefit cost		24.2	39.3		28.4
Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		1.1	0.8		0.8
Interest cost		$ 0.2	$ 0.1		$ 0.2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Expected return on plan assets		$ 0	$ 0		$ 0
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Amortization of net loss		$ 0.2	$ 0.2		$ 0.5
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Curtailment		$ 0	$ 0		$ 0.2
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Special termination benefits		$ 0	$ 0		$ 0
Amortization of unrecognized prior service cost	[1]	0.2	0.1		0
Settlement cost		0.3	2.1		2.7
Total net periodic benefit cost		2	3.3		4.4
Less: Amount paid by unconsolidated affiliates		0	0.1		0.1
Net periodic benefit cost		2	3.2		4.3
Other Pension Plan [Member] \| Og and E [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		0	0		0.1
Interest cost		$ 0	$ 0		$ 0.1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Expected return on plan assets		$ 0	$ 0		$ 0
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Amortization of net loss			$ 0.1		$ 0.4
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Special termination benefits		$ 0	$ 0		$ 0
Settlement cost		0	1.6		2.4
Total net periodic benefit cost		0	1.7		3
Amount Attributable to Parent		1.5	1.5		1.3
Net periodic benefit cost		1.5	3.2		4.3
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.2	0.2		0.2
Interest cost		$ 3.5	$ 3.4		$ 4.2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Expected return on plan assets		$ (1.8)	$ (1.8)		$ (1.8)
Amortization of net loss		$ 1.5	$ 2.8		$ 2
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Curtailment		$ 0	$ 0		$ (1.5)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Amortization of unrecognized prior service cost	[3]	$ (3.8)	$ (6.9)		$ (8.4)
Total net periodic benefit cost		(0.4)	(2.3)		(2.3)
Less: Amount paid by unconsolidated affiliates	[4]	0	(0.5)		(0.7)
Net periodic benefit cost		(0.4)	(1.8)		(1.6)
Other Postretirement Benefits Plan [Member] \| Oklahoma Jurisdiction
Defined Benefit Plan Disclosure [Line Items]
Settlement cost	[5]	0	0		(1.4)
Increase (decrease) of regulatory liability related to postretirement expense to maintain allowed recoverable amount in Oklahoma jurisdiction	[5]	(0.6)	0.4		1.6
Other Postretirement Benefits Plan [Member] \| Arkansas Jurisdiction
Defined Benefit Plan Disclosure [Line Items]
Settlement cost	[5]	0	0		(0.1)
Other Postretirement Benefits Plan [Member] \| Og and E [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.1	0.1		0.2
Interest cost		$ 2.7	$ 2.6		$ 3.2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Expected return on plan assets		$ (1.6)	$ (1.7)		$ (1.7)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Amortization of net loss		$ 1.5	$ 2.7		$ 2.1
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Curtailment		$ 0	$ 0		$ (1.3)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)		Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Amortization of unrecognized prior service cost	[3]	$ (3.6)	$ (5)		$ (6.1)
Total net periodic benefit cost		(0.9)	(1.3)		(1)
Amount Attributable to Parent	[4]	0	(0.5)		(0.5)
Net periodic benefit cost		$ (0.9)	$ (1.8)		$ (1.5)

[1] Unamortized prior service cost is amortized on a straight-line basis over the average remaining service period to the first eligibility age of participants who are expected to receive a benefit and are active at the date of the plan amendment. Included in the pension regulatory asset in each jurisdiction, as indicated in the regulatory assets and liabilities table in Note 1. Unamortized prior service cost is amortized on a straight-line basis over the average remaining service period to the first eligibility age of participants who are expected to receive a benefit and are active at the date of the plan amendment. "Amount paid by unconsolidated affiliates" is only applicable to OGE Energy. "Amount allocated from OGE Energy" is only applicable to OG&E. Included in the pension regulatory asset or liability in each jurisdiction, as indicated in the regulatory assets and liabilities table in Note 1.

Retirement Plans and Postreti_6

Retirement Plans and Postretirement Benefit Plans - Schedule of Capitalized Pension and Postretirement Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Capitalized Portion of Net Periodic Benefit Cost	$ 3	$ 3.4	$ 3.8
Pension Plan [Member] \| Og and E [Member]
Defined Benefit Plan Disclosure [Line Items]
Capitalized Portion of Net Periodic Benefit Cost	2.5	2.9	3.1
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Capitalized Portion of Net Periodic Benefit Cost	0.2	0.2	0.2
Other Postretirement Benefits Plan [Member] \| Og and E [Member]
Defined Benefit Plan Disclosure [Line Items]
Capitalized Portion of Net Periodic Benefit Cost	$ 0.1	$ 0.1	$ 0.1

Retirement Plans and Postreti_7

Retirement Plans and Postretirement Benefit Plans - Schedule of Assumptions Used (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assumptions Used Calculating Benefit Obligation, Discount Rate	5.45%	2.75%	2.30%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	4.20%	4.20%	4.20%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate	3.50%	3.50%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.01%	2.63%	2.88%
Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7%	7%	7.50%
Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	4.20%	4.20%	4.20%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted-Average Interest Crediting Rate	3.50%	3.50%	4%
Postretirement Benefit Plans [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assumptions Used Calculating Benefit Obligation, Discount Rate	5.40%	2.80%	2.45%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.80%	2.45%	3.25%
Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	4%	4%	4%

Retirement Plans and Postreti_8

Retirement Plans and Postretirement Benefit Plans - Projected Benefit Obligation Funded Status Thresholds (Details)	12 Months Ended
	Dec. 31, 2022
Less Than 90% [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected Benefit Obligation Funded Status Thresholds Fixed Income	50%
Projected Benefit Obligation Funded Status Thresholds Equity	50%
Projected Benefit Obligation Funded Status Thresholds	100%
95% [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected Benefit Obligation Funded Status Thresholds Fixed Income	58%
Projected Benefit Obligation Funded Status Thresholds Equity	42%
Projected Benefit Obligation Funded Status Thresholds	100%
100% [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected Benefit Obligation Funded Status Thresholds Fixed Income	65%
Projected Benefit Obligation Funded Status Thresholds Equity	35%
Projected Benefit Obligation Funded Status Thresholds	100%
105% [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected Benefit Obligation Funded Status Thresholds Fixed Income	73%
Projected Benefit Obligation Funded Status Thresholds Equity	27%
Projected Benefit Obligation Funded Status Thresholds	100%
110% [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected Benefit Obligation Funded Status Thresholds Fixed Income	80%
Projected Benefit Obligation Funded Status Thresholds Equity	20%
Projected Benefit Obligation Funded Status Thresholds	100%
115% [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected Benefit Obligation Funded Status Thresholds Fixed Income	85%
Projected Benefit Obligation Funded Status Thresholds Equity	15%
Projected Benefit Obligation Funded Status Thresholds	100%
120% [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected Benefit Obligation Funded Status Thresholds Fixed Income	90%
Projected Benefit Obligation Funded Status Thresholds Equity	10%
Projected Benefit Obligation Funded Status Thresholds	100%
Domestic All-Cap/Large Cap Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	40%
Domestic All-Cap/Large Cap Equity [Member] \| Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	35%
Domestic All-Cap/Large Cap Equity [Member] \| Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	60%
Domestic Mid-Cap Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	15%
Domestic Mid-Cap Equity [Member] \| Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	5%
Domestic Mid-Cap Equity [Member] \| Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	25%
Domestic Small-Cap Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	25%
Domestic Small-Cap Equity [Member] \| Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	5%
Domestic Small-Cap Equity [Member] \| Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	30%
International Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	20%
International Equity [Member] \| Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	10%
International Equity [Member] \| Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	30%

Retirement Plans and Postreti_9

Retirement Plans and Postretirement Benefit Plans - Defined Benefit Plan, Plan Assets, Category (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021
U.S. common stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 71.9	$ 86.1
U.S. treasury notes and bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[1]	44.6	135.2
Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		26.2	24.6
Corporate fixed income and other securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		65.5	107
Commingled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[2]	18.2	23.6
Foreign government bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.5	0.9
Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.9	1.4
Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		5.9	5.5
Interest and dividends receivable [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		1.6	2.1
Payable to broker for securities purchased [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		(25.2)	(2)
Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		60.4	99.8
Preferred Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		1.5	1.1
Cash Collateral [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.3	0.6
Receivable (foreign currency) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.1	0.1
Receivable from broker for securities sold [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		20.6
Total Plan investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		296	485.9
Plan Assets Attributable to Affiliates
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		(54.1)	(133)
Total Plan assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		293	486
Total Plan assets [Member] \| Og and E [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		238.9	353
Fair Value, Inputs, Level 1 [Member] \| U.S. common stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		71.9	86.1
Fair Value, Inputs, Level 1 [Member] \| U.S. treasury notes and bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[1]	44.6	135.2
Fair Value, Inputs, Level 1 [Member] \| Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fair Value, Inputs, Level 1 [Member] \| Corporate fixed income and other securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fair Value, Inputs, Level 1 [Member] \| Commingled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[2]	0	0
Fair Value, Inputs, Level 1 [Member] \| Foreign government bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fair Value, Inputs, Level 1 [Member] \| Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fair Value, Inputs, Level 1 [Member] \| Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fair Value, Inputs, Level 1 [Member] \| Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		60.4	99.8
Fair Value, Inputs, Level 1 [Member] \| Preferred Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		1.5	1.1
Fair Value, Inputs, Level 1 [Member] \| Cash Collateral [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.3	0.6
Fair Value, Inputs, Level 1 [Member] \| Receivable (foreign currency) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fair Value, Inputs, Level 1 [Member] \| Total Plan investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		178.7	322.8
Fair Value, Inputs, Level 2 [Member] \| U.S. common stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fair Value, Inputs, Level 2 [Member] \| U.S. treasury notes and bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[1]	0	0
Fair Value, Inputs, Level 2 [Member] \| Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		26.2	24.6
Fair Value, Inputs, Level 2 [Member] \| Corporate fixed income and other securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		65.5	107
Fair Value, Inputs, Level 2 [Member] \| Commingled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[2]	0	0
Fair Value, Inputs, Level 2 [Member] \| Foreign government bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.5	0.9
Fair Value, Inputs, Level 2 [Member] \| Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.9	1.4
Fair Value, Inputs, Level 2 [Member] \| Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fair Value, Inputs, Level 2 [Member] \| Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fair Value, Inputs, Level 2 [Member] \| Preferred Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fair Value, Inputs, Level 2 [Member] \| Cash Collateral [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fair Value, Inputs, Level 2 [Member] \| Receivable (foreign currency) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.1	0.1
Fair Value, Inputs, Level 2 [Member] \| Total Plan investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		93.2	134
Net Asset Value [Member] \| U.S. common stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0	[3]
Net Asset Value [Member] \| U.S. treasury notes and bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[1]	0	0	[3]
Net Asset Value [Member] \| Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0	[3]
Net Asset Value [Member] \| Corporate fixed income and other securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0	[3]
Net Asset Value [Member] \| Commingled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[2]	18.2	23.6	[3]
Net Asset Value [Member] \| Foreign government bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0	[3]
Net Asset Value [Member] \| Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0	[3]
Net Asset Value [Member] \| Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		5.9	5.5	[3]
Net Asset Value [Member] \| Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0	[3]
Net Asset Value [Member] \| Preferred Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0	[3]
Net Asset Value [Member] \| Cash Collateral [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0	[3]
Net Asset Value [Member] \| Receivable (foreign currency) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0	[3]
Net Asset Value [Member] \| Total Plan investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 24.1	$ 29.1	[3]

[1] This category represents U.S. Treasury notes and bonds with a Moody's Investors Service rating of Aaa and Government Agency Bonds with a Moody's Investors Service rating of A1 or higher. This category represents units of participation in a commingled fund that primarily invested in stocks of international companies and emerging markets. GAAP allows the measurement of certain investments that do not have a readily determinable fair value at the net asset value. These investments do not consider the observability of inputs; therefore, they are not included within the fair value hierarchy.

Retirement Plans and Postret_10

Retirement Plans and Postretirement Benefit Plans - Schedule of Expected Benefit Payments (Details) $ in Millions	Dec. 31, 2022 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected Future Benefit Payments, Next Twelve Months	$ 92
Expected Future Benefit Payments, Year Two	29.4
Expected Future Benefit Payments, Year Three	27.7
Expected Future Benefit Payments, Year Four	28.9
Expected Future Benefit Payments, Year Five	35.1
Expected Future Benefit Payments, Five Fiscal Years Thereafter	128.6
Og and E [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected Future Benefit Payments, Next Twelve Months	80.1
Expected Future Benefit Payments, Year Two	23.1
Expected Future Benefit Payments, Year Three	21.8
Expected Future Benefit Payments, Year Four	23
Expected Future Benefit Payments, Year Five	21.3
Expected Future Benefit Payments, Five Fiscal Years Thereafter	$ 99.7

Retirement Plans and Postret_11

Retirement Plans and Postretirement Benefit Plans - Schedule of Allocation of Plan Assets (Details) - Other Postretirement Benefits Plan [Member] - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	$ 32.8	$ 44.3	$ 47.6
Og and E [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	29.8	39.9	$ 42.7
Group Retiree Medical Insurance Contract [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	21.6	28.1
Mutual fund [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	11.2	16.2
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	11.2	16.2
Fair Value, Inputs, Level 1 [Member] \| Group Retiree Medical Insurance Contract [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 1 [Member] \| Mutual fund [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	11.2	16.2
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	21.6	28.1
Fair Value, Inputs, Level 3 [Member] \| Group Retiree Medical Insurance Contract [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	21.6	28.1
Fair Value, Inputs, Level 3 [Member] \| Mutual fund [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	32.8	44.3
Fair Value, Inputs, Level 1, 2 and 3 [Member] \| OGE Energy [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	(3)	(4.4)
Fair Value, Inputs, Level 1, 2 and 3 [Member] \| Og and E [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	$ 29.8	$ 39.9

Retirement Plans and Postret_12

Retirement Plans and Postretirement Benefit Plans - Summary of Reconciliation of Postretirement Benefit Plans Investments (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 Asset Value, Beginning of Period	$ 28.1
Claims paid	(4.8)
Net unrealized losses related to instruments held at the reporting date	(1.8)
Investment fees	(0.1)
Realized losses	(0.6)
Interest income	0.7
Dividend income	0.1
Level 3 Asset Value, End of Period	$ 21.6

Retirement Plans and Postret_13

Retirement Plans and Postretirement Benefit Plans - Summary of Gross Benefit Payments Registrants Expect to Pay (Details) $ in Millions	Dec. 31, 2022 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postretirement Plan, Expected Future Benefit Payments, Next Twelve Months	$ 12
Postretirement Plan, Expected Future Benefit Payments, Year Two	11.7
Postretirement Plan, Expected Future Benefit Payments, Year Three	10
Postretirement Plan, Expected Future Benefit Payments in Year Four	9.5
Postretirement Plan, Expected Future Benefit Payments, Year Five	8.9
Postretirement Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	37
Og and E [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postretirement Plan, Expected Future Benefit Payments, Next Twelve Months	9.1
Postretirement Plan, Expected Future Benefit Payments, Year Two	8.9
Postretirement Plan, Expected Future Benefit Payments, Year Three	7.5
Postretirement Plan, Expected Future Benefit Payments in Year Four	7.1
Postretirement Plan, Expected Future Benefit Payments, Year Five	6.7
Postretirement Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	$ 27.8

Report of Business Segments - S

Report of Business Segments - Summary of OGE Energy's Business Segments (Details) - USD ($) $ in Millions		11 Months Ended		12 Months Ended
	Dec. 02, 2021	Dec. 02, 2021	[1]	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Operating revenues				$ 3,375.7	$ 3,653.7	$ 2,122.3
Fuel, purchased power and direct transmission expense				1,662.4	2,127.6	644.6
Other operation and maintenance				501.4	463.1	462.8
Depreciation and amortization				460.9	416	391.3
Taxes other than income				101.5	102.8	101.4
OPERATING INCOME				649.5	544.2	522.2
Equity in earnings of unconsolidated affiliates		$ 169.8		0	169.8	(668)	[1],[2]
Gain on Enable/Energy Transfer transaction, net				0	344.4	0
Gain on equity securities				282.1	(8.6)	0
Other income (expense)				24	(21.6)	3.2
Interest expense				166.3	158.3	158.5
Income tax expense (benefit)				123.6	141.2	(127.4)
NET INCOME (LOSS)				665.7	737.3	(173.7)
Investment in unconsolidated affiliates						374.3
Total assets				12,544.7	12,606.4	10,718.8
Capital expenditures				1,050.9	778.5	650.5
Electric Company [Member]
Segment Reporting Information [Line Items]
Operating revenues				3,375.7	3,653.7	2,122.3
Fuel, purchased power and direct transmission expense				1,662.4	2,127.6	644.6
Other operation and maintenance				491.9	464.7	464.4
Depreciation and amortization				460.9	416	391.3
Taxes other than income				98	99.3	97.2
OPERATING INCOME				662.5	546.1	524.8
Equity in earnings of unconsolidated affiliates					0	0
Gain on Enable/Energy Transfer transaction, net					0
Gain on equity securities				0
Other income (expense)				11.2	7.7	4.1
Interest expense				157.8	152	154.8
Income tax expense (benefit)				76.4	41.8	34.7
NET INCOME (LOSS)				439.5	360	339.4
Investment in unconsolidated affiliates						0
Total assets				12,410.5	11,688	10,489
Capital expenditures				1,050.9	778.5	650.5
Natural Gas Midstream Operations [Member]
Segment Reporting Information [Line Items]
Operating revenues				0	0	0
Fuel, purchased power and direct transmission expense				0	0	0
Other operation and maintenance				12.6	1.6	1.7
Depreciation and amortization				0	0	0
Taxes other than income				0.1	0.2	0.4
OPERATING INCOME				(12.7)	(1.8)	(2.1)
Equity in earnings of unconsolidated affiliates					169.8	(668)	[2]
Gain on Enable/Energy Transfer transaction, net					344.4
Gain on equity securities				282.1
Other income (expense)				10	(26.4)	(2.9)
Interest expense				0	0	0
Income tax expense (benefit)				48.1	101	(158)
NET INCOME (LOSS)				231.3	385	(515)
Investment in unconsolidated affiliates						374.3
Total assets				1.2	786.6	378.1
Capital expenditures				0	0	0
Other Operations [Member]
Segment Reporting Information [Line Items]
Operating revenues				0	0	0
Fuel, purchased power and direct transmission expense				0	0	0
Other operation and maintenance				(3.1)	(3.2)	(3.3)
Depreciation and amortization				0	0	0
Taxes other than income				3.4	3.3	3.8
OPERATING INCOME				(0.3)	(0.1)	(0.5)
Equity in earnings of unconsolidated affiliates					0	0
Gain on Enable/Energy Transfer transaction, net					0
Gain on equity securities				0
Other income (expense)				4.9	(2)	3.6
Interest expense				10.6	7.2	5.3
Income tax expense (benefit)				(0.9)	(1.6)	(4.1)
NET INCOME (LOSS)				(5.1)	(7.7)	1.9
Investment in unconsolidated affiliates						0
Total assets				683.7	350.3	116.4
Capital expenditures				0	0	0
OGE Energy [Member]
Segment Reporting Information [Line Items]
Gain on Enable/Energy Transfer transaction, net	$ 344.4
Eliminations [Member]
Segment Reporting Information [Line Items]
Operating revenues				0	0	0
Fuel, purchased power and direct transmission expense				0	0	0
Other operation and maintenance				0	0	0
Depreciation and amortization				0	0	0
Taxes other than income				0	0	0
OPERATING INCOME				0	0	0
Equity in earnings of unconsolidated affiliates					0	0
Gain on Enable/Energy Transfer transaction, net					0
Gain on equity securities				0
Other income (expense)				(2.1)	(0.9)	(1.6)
Interest expense				(2.1)	(0.9)	(1.6)
Income tax expense (benefit)				0	0	0
NET INCOME (LOSS)				0	0	0
Investment in unconsolidated affiliates						0
Total assets				(550.7)	(218.5)	(264.7)
Capital expenditures				$ 0	$ 0	$ 0

[1] For the year ended December 31, 2020, Enable recorded a $ 225.0 million impairment on an equity method investment, which ran through OGE Energy's portion of Enable net income and was offset by basis differences that flow through the amortization of basis difference and dilution recognition line item above. In March 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable

Report of Business Segments -_2

Report of Business Segments - Summary of OGE Energy's Business Segments (Parenthetical) (Details) - USD ($) $ in Millions		11 Months Ended		12 Months Ended
	Mar. 31, 2020	Dec. 02, 2021		Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Other than Temporary Impairment	$ 780	$ 0	[1]	$ 780	[1]

[1] During the year ended December 31, 2020, OGE Energy recorded a $ 780.0 million impairment on its investment in Enable as, effective March 31, 2020, OGE estimated the fair value of its investment in Enable was below the book value and concluded the decline in value was not temporary.

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) Segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Utilities Operating Expense, Purchased Power under Long-term Contracts \| $	$ 58	$ 55.8	$ 57.3
CPV Keenan [Member]
Loss Contingencies [Line Items]
Utilities Operating Expense, Purchased Power under Long-term Contracts \| $	25.8	27.3	27.5
Edison Mission Energy [Member]
Loss Contingencies [Line Items]
Utilities Operating Expense, Purchased Power under Long-term Contracts \| $	24.9	21.7	22.8
NextEra Energy [Member]
Loss Contingencies [Line Items]
Utilities Operating Expense, Purchased Power under Long-term Contracts \| $	$ 7.3	$ 6.8	$ 7
OG&E long-term service agreement commitments [Member] \| McClain Plant [Member]
Loss Contingencies [Line Items]
Factored-Fired Hours	128,000
Factored-Fired Starts	4,800
OG&E long-term service agreement commitments [Member] \| Redbud Plant [Member]
Loss Contingencies [Line Items]
Factored-Fired Hours	144,000
Factored-Fired Starts	4,500
Additional Factored-Fired Hours	24,000

Commitments and Contingencies_2

Commitments and Contingencies - Unrecorded Unconditional Purchase Obligations Disclosure (Details) $ in Millions	Dec. 31, 2022 USD ($)
Loss Contingencies [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 168.7
Unrecorded Unconditional Purchase Obligation, Due within Two Years	163.3
Unrecorded Unconditional Purchase Obligation, Due within Three Years	126.1
Unrecorded Unconditional Purchase Obligation, Due within Four Years	99
Unrecorded Unconditional Purchase Obligation, Due within Five Years	106.1
Unrecorded Unconditional Purchase Obligation, Total	663.2
OG&E minimum fuel purchase commitments [Member]
Loss Contingencies [Line Items]
Purchase Obligation, Due in Next Twelve Months	110
Unrecorded Unconditional Purchase Obligation, Due within Two Years	92.2
Unrecorded Unconditional Purchase Obligation, Due within Three Years	66.4
Unrecorded Unconditional Purchase Obligation, Due within Four Years	24.6
Unrecorded Unconditional Purchase Obligation, Due within Five Years	24.6
Unrecorded Unconditional Purchase Obligation, Total	317.8
OG&E expected wind purchase commitments [Member]
Loss Contingencies [Line Items]
Purchase Obligation, Due in Next Twelve Months	56
Unrecorded Unconditional Purchase Obligation, Due within Two Years	56.6
Unrecorded Unconditional Purchase Obligation, Due within Three Years	56.9
Unrecorded Unconditional Purchase Obligation, Due within Four Years	57.3
Unrecorded Unconditional Purchase Obligation, Due within Five Years	57.7
Unrecorded Unconditional Purchase Obligation, Total	284.5
OG&E long-term service agreement commitments [Member]
Loss Contingencies [Line Items]
Purchase Obligation, Due in Next Twelve Months	2.7
Unrecorded Unconditional Purchase Obligation, Due within Two Years	14.5
Unrecorded Unconditional Purchase Obligation, Due within Three Years	2.8
Unrecorded Unconditional Purchase Obligation, Due within Four Years	17.1
Unrecorded Unconditional Purchase Obligation, Due within Five Years	23.8
Unrecorded Unconditional Purchase Obligation, Total	$ 60.9

Commitments and Contingencies_3

Commitments and Contingencies - Schedule of Wind Purchased Power (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Loss Contingencies [Line Items]
Utilities Operating Expense, Purchased Power under Long-term Contracts	$ 58	$ 55.8	$ 57.3
CPV Keenan [Member]
Loss Contingencies [Line Items]
Utilities Operating Expense, Purchased Power under Long-term Contracts	25.8	27.3	27.5
Edison Mission Energy [Member]
Loss Contingencies [Line Items]
Utilities Operating Expense, Purchased Power under Long-term Contracts	24.9	21.7	22.8
NextEra Energy [Member]
Loss Contingencies [Line Items]
Utilities Operating Expense, Purchased Power under Long-term Contracts	$ 7.3	$ 6.8	$ 7

Rate Matters and Regulation - A

Rate Matters and Regulation - Additional Information (Details) - USD ($)

1 Months Ended

6 Months Ended

12 Months Ended

Feb. 01, 2023

Dec. 29, 2022

Oct. 03, 2022

Sep. 29, 2022

Sep. 08, 2022

Aug. 01, 2022

Jul. 05, 2022

Jul. 01, 2022

May 18, 2022

Feb. 01, 2022

Apr. 01, 2021

Jan. 31, 2023

Dec. 31, 2021

Jun. 30, 2022

Dec. 31, 2022

Dec. 31, 2021

Jul. 31, 2022

Amortize and recovery of extraordinary fuel costs period

10 years

Pre-tax rate of return percentage

6.60%

Public Utilities, Requested Rate Increase (Decrease), Amount

$ 30,000,000

Recovery of regulatory asset period

10 years

Public Utilities, Approved Return on Equity, Percentage

9.50%

Repayment of securitization bonds period

28 years

Estimated Refund to SPP

$ 13,000,000

Regulatory assets

$ 1,230,800,000

524,300,000

$ 1,230,800,000

Securitization Authorization Requested

760,000,000

Securitization Authorization Granted

$ 750,000,000

Plan Investments for Customers

28,000,000

Requested Recovery of Capital Investment

1,200,000,000

Common Equity Percentage which ROE is based

53.37%

Annualized filing year revenues percentage

Increase (Decrease) in Regulatory Clause Revenue

$ 424,000,000

Subsequent Event [Member]

Pre-tax weighted average cost of capital percentage

6.49%

Recovery of regulatory asset period

10 years

Minimum [Member]

Lost Revenue on Plant Investments for Customers

16,200,000

Maximum [Member]

Lost Revenue on Plant Investments for Customers

63,900,000

In Favor Cooperatives [Member]

Plan Investments for Customers

11,700,000

In Favor Cooperatives [Member] | Minimum [Member]

Lost Revenues on Plant Investments for Customers

4,400,000

In Favor Cooperatives [Member] | Maximum [Member]

Lost Revenues on Plant Investments for Customers

7,900,000

Impact to Company [Member]

Estimated Refund to SPP

5,000,000

Customer Impact [Member]

Estimated Refund to SPP

$ 8,000,000

Oklahoma Corporation Commission [Member]

OG&E's Jurisdictional Revenues

88%

Arkansas Public Service Commission [Member]

OG&E's Jurisdictional Revenues

Federal Energy Regulatory Commission [Member]

OG&E's Jurisdictional Revenues

OKLAHOMA

Public Utilities, Requested Rate Increase (Decrease), Amount

$ 163,500,000

Public Utilities, Requested Return on Equity, Percentage

10.20%

Public Utilities, Approved Return on Equity, Percentage

9.50%

State corporate income tax adjustment rate

Common Equity Percentage which ROE is based

53.37%

ARKANSAS

Public Utilities, Approved Rate Increase (Decrease), Amount

$ 8,500,000

$ 4,200,000

Increase (decrease) in revenue requirement rose amount

$ 9,600,000

ARKANSAS | Subsequent Event [Member]

Increase (decrease) in revenue requirement rose amount

$ 9,600,000

Winter Storm Uri Costs [Member] | OKLAHOMA

Regulatory assets

$ 747,900,000

$ 0

$ 747,900,000

Winter Storm Uri Costs [Member] | ARKANSAS

Regulatory assets

$ 88,900,000

78,200,000

$ 88,900,000

Grid Enhancement

Costs recovery of program implemented

$ 6,000,000

Schedule II (Details)

Schedule II (Details) - USD ($) $ in Millions		12 Months Ended
Schedule II (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Beginning Balance		$ 2.4	$ 2.6	$ 1.5
Valuation Allowances and Reserves, Charged to Cost and Expense		2.8	3.2	3
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	[1]	3.3	3.4	1.9
Valuation Allowances and Reserves, Ending Balance		$ 1.9	$ 2.4	$ 2.6

[1] Uncollectible accounts receivable written off, net of recoveries.