CenterPoint Energy (CNP) 10-Q30 Apr 242024 Q1 Quarterly reportFinancial data

Company Profile

Cover Page

Cover Page - shares	3 Months Ended
Cover Page - shares	Mar. 31, 2024	Apr. 22, 2024
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	1-31447
Entity Registrant Name	CenterPoint Energy, Inc.
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	74-0694415
Entity Address, Address Line One	1111 Louisiana
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77002
City Area Code	713
Local Phone Number	207-1111
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		639,724,143
Entity Central Index Key	0001130310
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false
Common Stock, $0.01 Par Value \| New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	CNP
Security Exchange Name	NYSE
Common Stock, $0.01 Par Value \| Chicago Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	CNP
Security Exchange Name	CHX
Houston Electric
Entity Information [Line Items]
Entity File Number	1-3187
Entity Registrant Name	CenterPoint Energy Houston Electric, LLC
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	22-3865106
Entity Address, Address Line One	1111 Louisiana
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77002
City Area Code	713
Local Phone Number	207-1111
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		1,000
Entity Central Index Key	0000048732
Houston Electric \| 6.95% General Mortgage Bonds due 2033 \| New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	6.95% General Mortgage Bonds due 2033
Security Exchange Name	NYSE
No Trading Symbol Flag	true
CERC
Entity Information [Line Items]
Entity File Number	1-13265
Entity Registrant Name	CenterPoint Energy Resources Corp.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	76-0511406
Entity Address, Address Line One	1111 Louisiana
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77002
City Area Code	713
Local Phone Number	207-1111
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		1,000
Entity Central Index Key	0001042773
CERC \| 6.625% Senior Notes due 2037 \| New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	6.625% Senior Notes due 2037
Security Exchange Name	NYSE
No Trading Symbol Flag	true

Condensed Statements of Consoli

Condensed Statements of Consolidated Income (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues:
Utility revenues	$ 2,607	$ 2,717
Non-utility revenues	13	62
Total	2,620	2,779
Expenses:
Utility natural gas, fuel and purchased power	787	1,078
Non-utility cost of revenues, including natural gas	1	40
Operation and maintenance	709	663
Depreciation and amortization	363	319
Taxes other than income taxes	144	138
Total	2,004	2,238
Operating Income	616	541
Other Income (Expense):
Gain (loss) on equity securities	(83)	38
Gain (loss) on indexed debt securities	85	(39)
Interest expense and other finance charges	(198)	(148)
Interest expense on Securitization Bonds	(6)	(2)
Other income, net	14	13
Total	(188)	(138)
Income Before Income Taxes	428	403
Income tax expense	78	78
Net Income	350	325
Income allocated to preferred shareholders	0	12
Income Available to Common Shareholders	$ 350	$ 313
Basic Earnings Per Common Share (in dollars per share)	$ 0.55	$ 0.50
Diluted Earnings Per Common Share (in dollars per share)	$ 0.55	$ 0.49
Weighted Average Common Shares Outstanding, Basic (in shares)	632,228	630,309
Weighted Average Common Shares Outstanding, Diluted (in shares)	633,970	633,051

Condensed Statements of Conso_2

Condensed Statements of Consolidated Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 350	$ 325
Other comprehensive income (loss):
Adjustment to pension and other postretirement plans (net of tax of $-0- and $-0-)	(1)	(1)
Net deferred gain from cash flow hedges (net of tax of $-0- and $-0-)	3	0
Total	2	(1)
Comprehensive income	352	324
Income allocated to preferred shareholders	0	12
Comprehensive income available to common shareholders	$ 352	$ 312

Condensed Statements of Conso_3

Condensed Statements of Consolidated Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Adjustment to pension and other postretirement plans, tax	$ 0	$ 0
Net deferred gain from cash flow hedges, tax	$ 0	$ 0

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 161	$ 90
Investment in equity securities	458	541
Accounts receivable, less allowance for credit losses	675	710
Accrued unbilled revenues	372	516
Natural gas and coal inventory	104	197
Materials and supplies	559	573
Non-trading derivative assets	3	0
Taxes receivable	204	94
Current assets held for sale	1,325	0
Regulatory assets	294	161
Prepaid expenses and other current assets	131	145
Total current assets	4,286	3,027
Property, Plant and Equipment, net:
Property, plant and equipment	39,631	40,396
Less: accumulated depreciation and amortization	10,252	10,543
Property, plant and equipment, net	29,379	29,853
Other Assets:
Goodwill	3,943	4,160
Regulatory assets	2,428	2,513
Other non-current assets	163	162
Total other assets	6,534	6,835
Total Assets	40,199	39,715
Current Liabilities:
Short-term borrowings	0	4
Current portion of VIE Securitization Bonds long-term debt	178	178
Indexed debt, net	4	5
Current portion of other long-term debt	850	872
Indexed debt securities derivative	520	605
Accounts payable	753	917
Taxes accrued	193	291
Interest accrued	208	236
Dividends accrued	0	126
Customer deposits	97	111
Non-trading derivative liabilities	9	9
Current liabilities held for sale	224	0
Other current liabilities	394	510
Total current liabilities	3,430	3,864
Other Liabilities:
Deferred income taxes, net	4,295	4,079
Non-trading derivative liabilities	3	3
Benefit obligations	585	572
Regulatory liabilities	3,046	3,208
Other non-current liabilities	725	763
Total other liabilities	8,654	8,625
Long-term Debt, net:
VIE Securitization Bonds, net	320	320
Other long-term debt, net	17,797	17,239
Total long-term debt, net	18,117	17,559
Commitments and Contingencies (Note 13)
Shareholders’ Equity:
Common stock	6	6
Additional paid-in capital	8,583	8,604
Retained earnings	1,442	1,092
Accumulated other comprehensive loss	(33)	(35)
Total shareholders’ equity	9,998	9,667
Total Liabilities and Shareholders’ Equity	$ 40,199	$ 39,715

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Cash and cash equivalents	$ 161	$ 90
Accounts receivable, less allowance for credit losses	675	710
Allowance for credit losses	32	27
Accrued unbilled revenues, allowance for credit losses	2	2
Prepaid expenses and other current assets	131	145
Regulatory assets	$ 2,428	$ 2,513
Common Stock [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, outstanding (in shares)	633,166,053	631,225,829
Variable Interest Entity, Primary Beneficiary
Cash and cash equivalents	$ 132	$ 90
Accounts receivable, less allowance for credit losses	20	21
Accrued unbilled revenues, after allowance for credit losses, current	2	2
Prepaid expenses and other current assets	15	15
Regulatory assets	$ 367	$ 402

Condensed Statements of Conso_4

Condensed Statements of Consolidated Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash Flows from Operating Activities:
Net income	$ 350	$ 325
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	363	319
Deferred income taxes	193	(13)
Loss (gain) on equity securities	83	(38)
Loss (gain) on indexed debt securities	(85)	39
Pension contributions	(2)	(2)
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	72	351
Inventory	93	95
Taxes receivable	(110)	13
Accounts payable	(70)	(323)
Net regulatory assets and liabilities	(145)	1,025
Other current assets and liabilities	(224)	(86)
Other non-current assets and liabilities	40	6
Other operating activities, net	(20)	2
Net cash provided by operating activities	538	1,713
Cash Flows from Investing Activities:
Capital expenditures	(845)	(1,123)
Other investing activities, net	1	(32)
Net cash used in investing activities	(844)	(1,155)
Cash Flows from Financing Activities:
Decrease in short-term borrowings, net	(4)	(11)
Proceeds from (payments of) commercial paper, net	157	(1,315)
Proceeds from long-term debt and term loans	398	3,026
Payments of long-term debt and term loans, including make-whole premiums	(22)	(2,036)
Payment of debt issuance costs	(3)	(16)
Payment of dividends on Common Stock	(126)	(120)
Payment of dividends on Preferred Stock	0	(24)
Proceeds from issuance of Common Stock, net	3	0
Other financing activities, net	(27)	(23)
Net cash provided by (used in) financing activities	376	(519)
Net Increase in Cash, Cash Equivalents and Restricted Cash	70	39
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	109	91
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 179	$ 130

Condensed Statements of Conso_5

Condensed Statements of Consolidated Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Cumulative Preferred Stock	Common Stock	Additional Paid-in-Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Balance, beginning of period (in shares) at Dec. 31, 2022		1,000,000
Balance, beginning of period at Dec. 31, 2022		$ 790	$ 6	$ 8,568	$ 709	$ (31)
Balance, beginning of period (in shares) at Dec. 31, 2022			630,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances of Common Stock, net of issuance costs				0
Issuances related to benefit and investment plans (in shares)			1,000,000
Issuances related to benefit and investment plans			$ 0	(10)
Net income	$ 325				325
Other comprehensive income (loss)						(1)
Balance, end of period (in shares) at Mar. 31, 2023		1,000,000
Balance, end of period at Mar. 31, 2023	10,356	$ 790	$ 6	8,558	1,034	(32)
Balance, end of period (in shares) at Mar. 31, 2023			631,000,000
Balance, beginning of period (in shares) at Dec. 31, 2023		0
Balance, beginning of period at Dec. 31, 2023	$ 9,667	$ 0	$ 6	8,604	1,092	(35)
Balance, beginning of period (in shares) at Dec. 31, 2023	631,225,829		631,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances of Common Stock, net of issuance costs				3
Issuances related to benefit and investment plans (in shares)			2,000,000
Issuances related to benefit and investment plans			$ 0	(24)
Net income	$ 350				350
Other comprehensive income (loss)						2
Balance, end of period (in shares) at Mar. 31, 2024		0
Balance, end of period at Mar. 31, 2024	$ 9,998	$ 0	$ 6	$ 8,583	$ 1,442	$ (33)
Balance, end of period (in shares) at Mar. 31, 2024	633,166,053		633,000,000

Condensed Statements of Conso_6

Condensed Statements of Consolidated Changes in Equity (Unaudited) (Parenthetical) - $ / shares	Mar. 31, 2024	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	20,000,000	20,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	1,000,000,000	1,000,000,000

Condensed Statements of Conso_7

Condensed Statements of Consolidated Income (Unaudited) - Houston Electric - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues	$ 2,620	$ 2,779
Expenses:
Operation and maintenance	709	663
Depreciation and amortization	363	319
Taxes other than income taxes	144	138
Total	2,004	2,238
Operating Income	616	541
Other Income (Expense):
Interest expense and other finance charges	(198)	(148)
Interest expense on Securitization Bonds	(6)	(2)
Other income, net	14	13
Total	(188)	(138)
Income Before Income Taxes	428	403
Income tax expense	78	78
Net Income	350	325
Houston Electric
Revenues	901	792
Expenses:
Operation and maintenance	437	380
Depreciation and amortization	199	159
Taxes other than income taxes	75	64
Total	711	603
Operating Income	190	189
Other Income (Expense):
Interest expense and other finance charges	(76)	(53)
Interest expense on Securitization Bonds	(1)	(2)
Other income, net	11	7
Total	(66)	(48)
Income Before Income Taxes	124	141
Income tax expense	25	33
Net Income	$ 99	$ 108

Condensed Consolidated Balanc_3

Condensed Consolidated Balance Sheets (Unaudited) - Houston Electric - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 161	$ 90
Accounts receivable, less allowance for credit losses	675	710
Accrued unbilled revenues	372	516
Materials and supplies	559	573
Taxes receivable	204	94
Prepaid expenses and other current assets	131	145
Total current assets	4,286	3,027
Property, Plant and Equipment, net:
Property, plant and equipment	39,631	40,396
Less: accumulated depreciation and amortization	10,252	10,543
Property, plant and equipment, net	29,379	29,853
Other Assets:
Regulatory assets	2,428	2,513
Other non-current assets	163	162
Total other assets	6,534	6,835
Total Assets	40,199	39,715
Current Liabilities:
Current portion of VIE Securitization Bonds long-term debt	178	178
Accounts payable	753	917
Taxes accrued	193	291
Interest accrued	208	236
Other current liabilities	394	510
Total current liabilities	3,430	3,864
Other Liabilities:
Deferred income taxes, net	4,295	4,079
Benefit obligations	585	572
Regulatory liabilities	3,046	3,208
Other non-current liabilities	725	763
Total other liabilities	8,654	8,625
Total long-term debt, net	18,117	17,559
Commitments and Contingencies (Note 13)
Member’s Equity:
Common stock	6	6
Additional paid-in capital	8,583	8,604
Retained earnings	1,442	1,092
Total shareholders’ equity	9,998	9,667
Total Liabilities and Shareholders’ Equity	40,199	39,715
Houston Electric
Current Assets:
Cash and cash equivalents	109	76
Accrued unbilled revenues	122	142
Materials and supplies	410	409
Taxes receivable	5	38
Prepaid expenses and other current assets	32	48
Total current assets	1,529	1,259
Property, Plant and Equipment, net:
Property, plant and equipment	19,891	19,515
Less: accumulated depreciation and amortization	4,555	4,469
Property, plant and equipment, net	15,336	15,046
Other Assets:
Regulatory assets	725	752
Other non-current assets	33	29
Total other assets	758	781
Total Assets	17,623	17,086
Current Liabilities:
Current portion of VIE Securitization Bonds long-term debt	161	161
Taxes accrued	83	155
Interest accrued	115	99
Other current liabilities	86	111
Total current liabilities	881	981
Other Liabilities:
Deferred income taxes, net	1,397	1,406
Benefit obligations	40	32
Regulatory liabilities	958	1,025
Other non-current liabilities	122	107
Total other liabilities	2,517	2,570
Total long-term debt, net	7,823	7,426
Commitments and Contingencies (Note 13)
Member’s Equity:
Common stock	0	0
Additional paid-in capital	4,975	4,745
Retained earnings	1,427	1,364
Total shareholders’ equity	6,402	6,109
Total Liabilities and Shareholders’ Equity	17,623	17,086
Houston Electric \| Nonrelated Party
Current Assets:
Accounts receivable, less allowance for credit losses	265	295
Current Liabilities:
Accounts payable	347	351
Houston Electric \| Affiliated Entity
Current Assets:
Accounts and notes receivable–affiliated companies	586	251
Current Liabilities:
Accounts and notes payable–affiliated companies	$ 89	$ 104

Condensed Consolidated Balanc_4

Condensed Consolidated Balance Sheets (Unaudited) - Houston Electric (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Cash and cash equivalents	$ 161	$ 90
Accounts receivable, less allowance for credit losses	675	710
Allowance for credit losses	32	27
Prepaid expenses and other current assets	131	145
Regulatory assets	2,428	2,513
Houston Electric
Cash and cash equivalents	109	76
Allowance for credit losses	1	1
Prepaid expenses and other current assets	32	48
Regulatory assets	725	752
Variable Interest Entity, Primary Beneficiary
Cash and cash equivalents	132	90
Accounts receivable, less allowance for credit losses	20	21
Prepaid expenses and other current assets	15	15
Regulatory assets	367	402
Variable Interest Entity, Primary Beneficiary \| Houston Electric
Cash and cash equivalents	109	76
Accounts receivable, less allowance for credit losses	18	19
Prepaid expenses and other current assets	13	13
Regulatory assets	$ 42	$ 74

Condensed Statements of Conso_8

Condensed Statements of Consolidated Cash Flows (Unaudited) - Houston Electric - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash Flows from Operating Activities:
Net income	$ 350	$ 325
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	363	319
Deferred income taxes	193	(13)
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	72	351
Inventory	93	95
Accounts payable	(70)	(323)
Taxes receivable	(110)	13
Net regulatory assets and liabilities	(145)	1,025
Other current assets and liabilities	(224)	(86)
Other non-current assets and liabilities	40	6
Other operating activities, net	(20)	2
Net cash provided by operating activities	538	1,713
Cash Flows from Investing Activities:
Capital expenditures	(845)	(1,123)
Other investing activities, net	1	(32)
Net cash used in investing activities	(844)	(1,155)
Cash Flows from Financing Activities:
Proceeds from long-term debt and term loans	398	3,026
Payment of debt issuance costs	(3)	(16)
Other financing activities, net	(27)	(23)
Net cash provided by (used in) financing activities	376	(519)
Net Increase in Cash, Cash Equivalents and Restricted Cash	70	39
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	109	91
Cash, Cash Equivalents and Restricted Cash at End of Period	179	130
Houston Electric
Cash Flows from Operating Activities:
Net income	99	108
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	199	159
Deferred income taxes	(11)	18
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	51	86
Accounts receivable/payable–affiliated companies	(15)	(57)
Inventory	(1)	(34)
Accounts payable	25	3
Taxes receivable	33	0
Net regulatory assets and liabilities	(79)	(95)
Other current assets and liabilities	(79)	(90)
Other non-current assets and liabilities	23	1
Other operating activities, net	(4)	(5)
Net cash provided by operating activities	241	94
Cash Flows from Investing Activities:
Capital expenditures	(461)	(587)
Decrease (increase) in notes receivable–affiliated companies	(335)	(313)
Other investing activities, net	1	(5)
Net cash used in investing activities	(795)	(905)
Cash Flows from Financing Activities:
Proceeds from long-term debt and term loans	398	898
Decrease in notes payable–affiliated companies	0	(642)
Dividends to parent	(36)	(51)
Contribution from parent	230	650
Payment of debt issuance costs	(3)	(7)
Other financing activities, net	(2)	(1)
Net cash provided by (used in) financing activities	587	847
Net Increase in Cash, Cash Equivalents and Restricted Cash	33	36
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	89	88
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 122	$ 124

Condensed Statements of Conso_9

Condensed Statements of Consolidated Changes in Equity (Unaudited) - Houston Electric - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in-Capital	Retained Earnings	Houston Electric	Houston Electric Common Stock	Houston Electric Additional Paid-in-Capital	Houston Electric Retained Earnings
Balance, beginning of period (in shares) at Dec. 31, 2022		630,000,000				1,000
Balance, beginning of period at Dec. 31, 2022		$ 6	$ 8,568	$ 709		$ 0	$ 3,860	$ 1,138
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Contribution from parent							650
Net income	$ 325			325	$ 108			108
Dividend to parent								(51)
Balance, end of period (in shares) at Mar. 31, 2023		631,000,000				1,000
Balance, end of period at Mar. 31, 2023	$ 10,356	$ 6	8,558	1,034	5,705	$ 0	4,510	1,195
Balance, beginning of period (in shares) at Dec. 31, 2023	631,225,829	631,000,000				1,000
Balance, beginning of period at Dec. 31, 2023	$ 9,667	$ 6	8,604	1,092	6,109	$ 0	4,745	1,364
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Contribution from parent							230
Net income	$ 350			350	99			99
Dividend to parent								(36)
Balance, end of period (in shares) at Mar. 31, 2024	633,166,053	633,000,000				1,000
Balance, end of period at Mar. 31, 2024	$ 9,998	$ 6	$ 8,583	$ 1,442	$ 6,402	$ 0	$ 4,975	$ 1,427

Condensed Statements of Cons_10

Condensed Statements of Consolidated Income (Unaudited) - CERC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues:
Utility revenues	$ 2,607	$ 2,717
Non-utility revenues	13	62
Total	2,620	2,779
Expenses:
Utility natural gas	787	1,078
Non-utility cost of revenues, including natural gas	1	40
Operation and maintenance	709	663
Depreciation and amortization	363	319
Taxes other than income taxes	144	138
Total	2,004	2,238
Operating Income	616	541
Other Income (Expense):
Interest expense and other finance charges	(198)	(148)
Other income, net	14	13
Total	(188)	(138)
Income Before Income Taxes	428	403
Income tax expense	78	78
Net Income	350	325
CERC
Revenues:
Utility revenues	1,500	1,707
Non-utility revenues	12	10
Total	1,512	1,717
Expenses:
Utility natural gas	724	998
Non-utility cost of revenues, including natural gas	1	1
Operation and maintenance	226	218
Depreciation and amortization	127	118
Taxes other than income taxes	64	69
Total	1,142	1,404
Operating Income	370	313
Other Income (Expense):
Interest expense and other finance charges	(49)	(42)
Other income, net	3	1
Total	(46)	(41)
Income Before Income Taxes	324	272
Income tax expense	60	60
Net Income	$ 264	$ 212

Condensed Statements of Cons_11

Condensed Statements of Consolidated Comprehensive Income (Unaudited) - CERC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net income	$ 350	$ 325
Adjustment to pension and other postretirement plans (net of tax of, $-0- and $-0-)	(1)	(1)
Other comprehensive loss	2	(1)
CERC
Net income	264	212
Adjustment to pension and other postretirement plans (net of tax of, $-0- and $-0-)	(1)	(1)
Other comprehensive loss	(1)	(1)
Comprehensive income	$ 263	$ 211

Condensed Statements of Cons_12

Condensed Statements of Consolidated Comprehensive Income (Unaudited) - CERC (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Adjustment to pension and other postemployment plans, tax	$ 0	$ 0
CERC
Adjustment to pension and other postemployment plans, tax	$ 0	$ 0

Condensed Consolidated Balanc_5

Condensed Consolidated Balance Sheets (Unaudited) - CERC - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 161	$ 90
Accounts receivable, less allowance for credit losses	675	710
Accrued unbilled revenues	372	516
Materials and supplies	559	573
Natural gas and coal inventory	104	197
Taxes receivable	204	94
Current assets held for sale	1,325	0
Regulatory assets	294	161
Prepaid expenses and other current assets	131	145
Total current assets	4,286	3,027
Property, Plant and Equipment, net:
Property, plant and equipment	39,631	40,396
Less: accumulated depreciation and amortization	10,252	10,543
Property, plant and equipment, net	29,379	29,853
Other Assets:
Goodwill	3,943	4,160
Regulatory assets	2,428	2,513
Other non-current assets	163	162
Total other assets	6,534	6,835
Total Assets	40,199	39,715
Current Liabilities:
Short-term borrowings	0	4
Accounts payable	753	917
Taxes accrued	193	291
Interest accrued	208	236
Customer deposits	97	111
Non-trading derivative liabilities	9	9
Current liabilities held for sale	224	0
Other current liabilities	394	510
Total current liabilities	3,430	3,864
Other Liabilities:
Deferred income taxes, net	4,295	4,079
Non-trading derivative liabilities	3	3
Benefit obligations	585	572
Regulatory liabilities	3,046	3,208
Other non-current liabilities	725	763
Total other liabilities	8,654	8,625
Total long-term debt, net	18,117	17,559
Commitments and Contingencies (Note 13)
Shareholders’ Equity:
Common stock	6	6
Additional paid-in capital	8,583	8,604
Retained earnings	1,442	1,092
Accumulated other comprehensive income	(33)	(35)
Total shareholders’ equity	9,998	9,667
Total Liabilities and Shareholders’ Equity	40,199	39,715
CERC
Current Assets:
Cash and cash equivalents	17	1
Accrued unbilled revenues	214	329
Materials and supplies	98	107
Natural gas and coal inventory	69	156
Taxes receivable	137	101
Current assets held for sale	1,230	0
Regulatory assets	291	161
Prepaid expenses and other current assets	30	55
Total current assets	2,466	1,309
Property, Plant and Equipment, net:
Property, plant and equipment	14,671	15,672
Less: accumulated depreciation and amortization	3,961	4,169
Property, plant and equipment, net	10,710	11,503
Other Assets:
Goodwill	1,461	1,583
Regulatory assets	790	850
Other non-current assets	51	51
Total other assets	2,302	2,484
Total Assets	15,478	15,296
Current Liabilities:
Short-term borrowings	0	4
Taxes accrued	118	145
Interest accrued	44	70
Customer deposits	81	95
Non-trading derivative liabilities	8	8
Current liabilities held for sale	224	0
Other current liabilities	232	274
Total current liabilities	1,090	1,087
Other Liabilities:
Deferred income taxes, net	1,370	1,246
Non-trading derivative liabilities	2	3
Benefit obligations	74	74
Regulatory liabilities	1,796	1,882
Other non-current liabilities	400	455
Total other liabilities	3,642	3,660
Total long-term debt, net	4,719	4,670
Commitments and Contingencies (Note 13)
Shareholders’ Equity:
Common stock	0	0
Additional paid-in capital	4,229	4,229
Retained earnings	1,783	1,634
Accumulated other comprehensive income	15	16
Total shareholders’ equity	6,027	5,879
Total Liabilities and Shareholders’ Equity	15,478	15,296
CERC \| Nonrelated Party
Current Assets:
Accounts receivable, less allowance for credit losses	343	356
Current Liabilities:
Accounts payable	271	392
CERC \| Affiliated Entity
Current Assets:
Accounts and notes receivable–affiliated companies	37	43
Current Liabilities:
Accounts and notes payable–affiliated companies	$ 112	$ 99

Condensed Consolidated Balanc_6

Condensed Consolidated Balance Sheets (Unaudited) - CERC (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Allowance for credit losses	$ 32	$ 27
Accrued unbilled revenues, allowance for credit losses	2	2
CERC
Allowance for credit losses	29	25
Accrued unbilled revenues, allowance for credit losses	$ 2	$ 1

Condensed Statements of Cons_13

Condensed Statements of Consolidated Cash Flows (Unaudited) - CERC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash Flows from Operating Activities:
Net income	$ 350	$ 325
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	363	319
Deferred income taxes	193	(13)
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	72	351
Inventory	93	95
Taxes receivable	(110)	13
Accounts payable	(70)	(323)
Net regulatory assets and liabilities	(145)	1,025
Other current assets and liabilities	(224)	(86)
Other non-current assets and liabilities	40	6
Other operating activities, net	(20)	2
Net cash provided by operating activities	538	1,713
Cash Flows from Investing Activities:
Capital expenditures	(845)	(1,123)
Other investing activities, net	1	(32)
Net cash used in investing activities	(844)	(1,155)
Cash Flows from Financing Activities:
Decrease in short-term borrowings, net	(4)	(11)
Proceeds from (payments of) commercial paper, net	157	(1,315)
Proceeds from long-term debt and term loans	398	3,026
Payments of long-term debt and term loan	(22)	(2,036)
Payment of debt issuance costs	(3)	(16)
Other financing activities, net	(27)	(23)
Net cash provided by (used in) financing activities	376	(519)
Net Increase in Cash, Cash Equivalents and Restricted Cash	70	39
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	109	91
Cash, Cash Equivalents and Restricted Cash at End of Period	179	130
CERC
Cash Flows from Operating Activities:
Net income	264	212
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	127	118
Deferred income taxes	106	21
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	21	233
Accounts receivable/payable–affiliated companies	18	(90)
Inventory	82	141
Taxes receivable	(36)	0
Accounts payable	(81)	(289)
Net regulatory assets and liabilities	(69)	1,136
Other current assets and liabilities	(53)	45
Other non-current assets and liabilities	12	3
Other operating activities, net	(13)	1
Net cash provided by operating activities	378	1,531
Cash Flows from Investing Activities:
Capital expenditures	(303)	(391)
Decrease (increase) in notes receivable–affiliated companies	1	(30)
Other investing activities, net	13	(2)
Net cash used in investing activities	(289)	(423)
Cash Flows from Financing Activities:
Decrease in short-term borrowings, net	(4)	(11)
Proceeds from (payments of) commercial paper, net	48	(805)
Proceeds from long-term debt and term loans	0	1,698
Payments of long-term debt and term loan	0	(1,775)
Dividends to parent	(115)	(204)
Payment of debt issuance costs	0	(9)
Other financing activities, net	(2)	(1)
Net cash provided by (used in) financing activities	(73)	(1,107)
Net Increase in Cash, Cash Equivalents and Restricted Cash	16	1
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	1	0
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 17	$ 1

Condensed Statements of Cons_14

Condensed Statements of Consolidated Changes in Equity (Unaudited) - CERC - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in-Capital	Retained Earnings	Accumulated Other Comprehensive Loss	CERC	CERC Common Stock	CERC Additional Paid-in-Capital	CERC Retained Earnings	CERC Accumulated Other Comprehensive Loss
Balance, beginning of period (in shares) at Dec. 31, 2022		630,000,000					1,000
Balance, beginning of period at Dec. 31, 2022		$ 6	$ 8,568	$ 709	$ (31)		$ 0	$ 3,729	$ 1,618	$ 16
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 325			325		$ 212			212
Dividend to parent									(204)
Other comprehensive loss					(1)					(1)
Balance, end of period (in shares) at Mar. 31, 2023		631,000,000					1,000
Balance, end of period at Mar. 31, 2023	$ 10,356	$ 6	8,558	1,034	(32)	5,370	$ 0	3,729	1,626	15
Balance, beginning of period (in shares) at Dec. 31, 2023	631,225,829	631,000,000					1,000
Balance, beginning of period at Dec. 31, 2023	$ 9,667	$ 6	8,604	1,092	(35)	5,879	$ 0	4,229	1,634	16
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 350			350		264			264
Dividend to parent									(115)
Other comprehensive loss					2					(1)
Balance, end of period (in shares) at Mar. 31, 2024	633,166,053	633,000,000					1,000
Balance, end of period at Mar. 31, 2024	$ 9,998	$ 6	$ 8,583	$ 1,442	$ (33)	$ 6,027	$ 0	$ 4,229	$ 1,783	$ 15

Background and Basis of Present

Background and Basis of Presentation	3 Months Ended
Background and Basis of Presentation	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Background and Basis of Presentation	Background and Basis of Presentation General. This combined Form 10-Q is filed separately by three registrants: CenterPoint Energy, Inc., CenterPoint Energy Houston Electric, LLC and CenterPoint Energy Resources Corp. Information contained herein relating to any individual registrant is filed by such registrant solely on its own behalf. Each registrant makes no representation as to information relating exclusively to the other Registrants or the subsidiaries of CenterPoint Energy other than itself or its subsidiaries. Except as discussed in Note 11 to the Registrants’ Interim Condensed Financial Statements, no registrant has an obligation in respect of any other Registrant’s debt securities, and holders of such debt securities should not consider the financial resources or results of operations of any Registrant other than the obligor in making a decision with respect to such securities. Basis of Presentation. Included in this combined Form 10-Q are the Interim Condensed Financial Statements of CenterPoint Energy, Houston Electric and CERC, which are referred to collectively as the Registrants. The Interim Condensed Financial Statements are unaudited, omit certain financial statement disclosures and should be read with the Registrants’ financial statements included in the Registrants’ combined annual report on Form 10-K for the year ended December 31, 2023. The Combined Notes to Interim Condensed Financial Statements apply to all Registrants and specific references to Houston Electric and CERC herein also pertain to CenterPoint Energy, unless otherwise indicated. The Interim Condensed Financial Statements reflect all normal and recurring adjustments that are, in the opinion of management, necessary to present fairly the financial position, results of operations and cash flows for the respective periods. Amounts reported in the Condensed Statements of Consolidated Income are not necessarily indicative of amounts expected for a full-year period due to the effects of, among other things, (a) seasonal fluctuations in demand for energy, (b) changes in energy commodity prices, (c) timing of maintenance and other expenditures and (d) acquisitions and dispositions of businesses, assets and other interests. Background . CenterPoint Energy, Inc. is a public utility holding company. On June 30, 2023, CenterPoint Energy completed the sale of its indirect subsidiary, Energy Systems Group, to an unaffiliated third party. On February 19, 2024, CenterPoint Energy, through its subsidiary CERC Corp., entered into the LAMS Asset Purchase Agreement to sell its Louisiana and Mississippi natural gas LDC businesses. The transaction is expected to close in the first quarter of 2025. For additional information, see Note 3. As of March 31, 2024, CenterPoint Energy’s operating subsidiaries were as follows: • Houston Electric owns and operates electric transmission and distribution facilities in the Texas gulf coast area that includes the city of Houston; • CERC Corp. (i) directly owns and operates natural gas distribution systems in Louisiana, Minnesota, Mississippi and Texas, (ii) indirectly, through Indiana Gas and VEDO, owns and operates natural gas distribution systems in Indiana and Ohio, respectively, and (iii) owns and operates permanent pipeline connections through interconnects with various interstate and intrastate pipeline companies through CEIP; and • SIGECO provides energy delivery services to electric and natural gas customers located in and near Evansville in southwestern Indiana and owns and operates electric generation assets to serve its electric customers and optimizes those assets in the wholesale power market. As of March 31, 2024, CenterPoint Energy’s reportable segments were Electric, Natural Gas, and Corporate and Other. Houston Electric and CERC each consist of a single reportable segment. For a description of CenterPoint Energy’s reportable segments, see Note 15. Principles of Consolidation. The accompanying Interim Condensed Financial Statements have been prepared in conformity with generally accepted accounting principles. The accounts of the Registrants and their wholly-owned and majority-owned and controlled subsidiaries are included in the Interim Condensed Financial Statements. All intercompany transactions and balances are eliminated in consolidation. As of March 31, 2024, CenterPoint Energy, Houston Electric and SIGECO had VIEs including the Bond Companies and the SIGECO Securitization Subsidiary, which are consolidated. The consolidated VIEs are wholly-owned, bankruptcy-remote, special purpose entities that were formed solely for the purpose of securitizing transition property or facilitating the securitization financing of qualified costs in the second quarter of 2023 associated with the completed retirement of SIGECO’s A.B. Brown coal generation facilities. CenterPoint Energy, through SIGECO, has a controlling financial interest in the SIGECO Securitization Subsidiary and is the VIE’s primary beneficiary. For further information, see Note 6. Creditors of CenterPoint Energy, Houston Electric and SIGECO have no recourse to any assets or revenues of the Bond Companies or the SIGECO Securitization Subsidiary, as applicable. The Securitization Bonds issued by these VIEs are payable only from and secured by transition or securitization property, as applicable, and the bondholders have no recourse to the general credit of CenterPoint Energy, Houston Electric or SIGECO. The preparation of the Registrants’ financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and 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.

New Accounting Pronouncements

New Accounting Pronouncements	3 Months Ended
New Accounting Pronouncements	Mar. 31, 2024
Accounting Standards Update and Change in Accounting Principle [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (“ASU 2023-07”). This ASU updates segment disclosure requirements through enhanced disclosures around significant segment expenses. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and for interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The Registrants are currently evaluating the impact of this ASU on their respective consolidated financial statements. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures (“ASU 2023-09”). This ASU enhances the transparency of income tax disclosures related to rate reconciliation and income taxes. ASU 2023-09 is effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The Registrants are currently evaluating the impact of this ASU on their respective consolidated financial statements. Management believes that all other recently adopted and recently issued accounting standards that are not yet effective will not have a material impact on the Registrants’ financial position, results of operations or cash flows upon adoption.

Held for Sale and Divestitures

Held for Sale and Divestitures (CenterPoint Energy and CERC)	3 Months Ended
	Mar. 31, 2024
Discontinued Operations and Disposal Groups [Abstract]
Held for Sale and Divestitures (CenterPoint Energy and CERC)	Held for Sale and Divestitures (CenterPoint Energy and CERC) Held for Sale. On February 19, 2024, CERC Corp. entered into the LAMS Asset Purchase Agreement, pursuant to which CERC Corp. has agreed to sell its Louisiana and Mississippi natural gas LDC businesses. The purchase price for the Louisiana and Mississippi natural gas LDC businesses is $1.2 billion and subject to adjustment as set forth in the LAMS Asset Purchase Agreement, including adjustments based on net working capital, regulatory assets and liabilities and capital expenditures at closing. The completion of the proposed transaction is subject to customary closing conditions, including (i) the expiration or termination of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, (ii) approval of the LPSC, (iii) approval of the MPSC, (iv) no Material Adverse Effect (as defined in the LAMS Asset Purchase Agreement) having occurred, and (v) customary closing conditions regarding the accuracy of the representations and warranties and compliance by the parties with the respective obligations under the LAMS Asset Purchase Agreement. The proposed transaction is not subject to a financing condition and is expected to close by the end of the first quarter of 2025, subject to satisfaction of the foregoing conditions. The businesses include approximately 12,000 miles of main pipeline in Louisiana and Mississippi serving more than 300,000 customers. The Louisiana and Mississippi natural gas LDC businesses are reflected in CenterPoint Energy’s Natural Gas reportable segment and CERC’s single reportable segment, as applicable. Filings were made on April 24, 2024 to the LPSC and on April 25, 2024 to the MPSC requesting approval of the transaction. In February 2024, certain assets and liabilities representing the Louisiana and Mississippi natural gas LDC businesses met the held for sale criteria. The sale will be considered an asset sale for tax purposes, requiring net deferred tax liabilities to be excluded from held for sale balances. The Registrants record assets and liabilities held for sale at the lower of their carrying value or their estimated fair value less cost to sell. Neither CenterPoint Energy nor CERC recognized any gains or losses upon classification of held for sale during the three months ended March 31, 2024. See Note 9 for further information about the allocation of goodwill to the businesses to be sold. The assets and liabilities of the Louisiana and Mississippi natural gas LDC businesses classified as held for sale in CenterPoint Energy’s and CERC’s Condensed Consolidated Balance Sheets, as applicable, included the following: March 31, 2024 CenterPoint Energy CERC (in millions) Receivables, net $ 33 $ 33 Accrued unbilled revenues 20 20 Natural gas inventory 1 1 Materials and supplies 13 13 Property, plant and equipment, net 984 984 Goodwill 217 122 Regulatory assets 55 55 Other 2 2 Total current assets held for sale $ 1,325 $ 1,230 Accounts payable 25 25 Customer deposits 14 14 Regulatory liabilities 94 94 Other 91 91 Total current liabilities held for sale $ 224 $ 224 Although the Louisiana and Mississippi natural gas LDC businesses met the held for sale criteria, their disposals do not represent a strategic shift for CenterPoint Energy and CERC as both will retain significant operations in, and will continue to invest in, their natural gas businesses. Therefore, the assets and liabilities associated with these transactions are not reflected as discontinued operations on CenterPoint Energy’s and CERC’s Condensed Statements of Consolidated Income, as applicable, and the December 31, 2023 Condensed Consolidated Balance Sheets were not required to be recast for assets held for sale. Since the depreciation on the Louisiana and Mississippi natural gas LDC businesses assets will continue to be reflected in revenues through customer rates until the expected closing of the transaction and will be reflected in the carryover basis of the rate-regulated assets once sold, CenterPoint Energy and CERC will continue to record depreciation on those assets through the expected closing of the transaction. The pre-tax income for the Louisiana and Mississippi Natural Gas businesses, excluding interest and corporate allocations, included in CenterPoint Energy’s and CERC’s Condensed Statements of Consolidated Income is as follows: Three Months Ended March 31, 2024 2023 (in millions) Income Before Income Taxes $ 41 $ 32 Divestiture of Energy Systems Group. On May 21, 2023, CenterPoint Energy, through its subsidiary Vectren Energy Services, entered into an Equity Purchase Agreement to sell all of the outstanding limited liability company interests of Energy Systems Group to ESG Holdings Group, for a purchase price of $157 million, subject to customary adjustments set forth in the Equity Purchase Agreement, including adjustments based on Energy Systems Group’s net working capital at closing, indebtedness, cash and cash equivalents and transaction expenses. The transaction closed on June 30, 2023, and CenterPoint Energy received $154 million in cash, subject to finalization of the purchase price adjustment. Additionally, as of March 31, 2024, CenterPoint Energy had a payable of approximately $2 million to ESG Holdings Group for working capital and other adjustments set forth in the Equity Purchase Agreement. In May 2023, certain assets and liabilities of Energy Systems Group met the held for sale criteria. The divestiture of Energy Systems Group reflects CenterPoint Energy’s continued strategic focus on its core utility businesses. The historical annual revenues, net income and total assets of Energy Systems Groups did not have a sufficient effect, quantitatively or qualitatively, on CenterPoint Energy’s financial results to be considered a strategic shift. Therefore, the income and expenses associated with Energy Systems Group were not reflected as discontinued operations on CenterPoint Energy’s Condensed Statements of Consolidated Income. Depreciation and amortization of long-lived assets ceased at the end of the quarter in which the held for sale criteria was met. Additionally, as a result of the completion of the sale of Energy Systems Group in June 2023, there were no assets or liabilities associated with Energy Systems Group classified as held for sale as of March 31, 2024. For a discussion of guarantees and product warranties related to Energy Systems Group prior to the sale, see Note 13(b). CenterPoint Energy recognized a loss on sale of approximately $13 million, including $3 million of transaction costs, during the year ended December 31, 2023, in connection with the closing of the sale of Energy Systems Group. Additionally, CenterPoint Energy recognized a current tax expense of $32 million during the year ended December 31, 2023, as a result of the cash taxes payable upon the closing of the sale. The pre-tax loss for Energy Systems Group, excluding interest and corporate allocations, included in CenterPoint Energy’s Condensed Statements of Consolidated Income is as follows: Three Months Ended March 31, 2023 (in millions) Loss from Continuing Operations Before Income Taxes $ 6

Revenue Recognition and Allowan

Revenue Recognition and Allowance for Credit Losses	3 Months Ended
Revenue Recognition and Allowance for Credit Losses	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Revenue Recognition and Allowance for Credit Losses	Revenue Recognition and Allowance for Credit Losses In accordance with ASC 606, Revenue from Contracts with Customers, revenue is recognized when a customer obtains control of promised goods or services. The amount of revenue recognized reflects the consideration to which the Registrants expect to be entitled to receive in exchange for these goods or services. ARPs are contracts between the utility and its regulators, not between the utility and a customer. The Registrants recognize ARP revenue as other revenues when the regulator-specified conditions for recognition have been met. Upon recovery of ARP revenue through incorporation in rates charged for utility service to customers, ARP revenue is reversed and recorded as revenue from contracts with customers. The recognition of ARP revenues and the reversal of ARP revenues upon recovery through rates charged for utility service may not occur in the same period. The following tables disaggregate revenues by reportable segment and major source: CenterPoint Energy Three Months Ended March 31, 2024 Electric Natural Gas Corporate Total (in millions) Revenue from contracts with customers $ 1,052 $ 1,541 $ 1 $ 2,594 Other (1) (3) 29 — 26 Total revenues $ 1,049 $ 1,570 $ 1 $ 2,620 Three Months Ended March 31, 2023 Electric Natural Gas Corporate Total (in millions) Revenue from contracts with customers $ 958 $ 1,752 $ 51 $ 2,761 Other (1) (6) 23 1 18 Total revenues $ 952 $ 1,775 $ 52 $ 2,779 (1) Primarily consists of income from ARPs and leases. Total lease income was $2 million for both the three months ended March 31, 2024 and 2023. Houston Electric Three Months Ended March 31, 2024 2023 (in millions) Revenue from contracts with customers $ 910 $ 803 Other (1) (9) (11) Total revenues $ 901 $ 792 (1) Primarily consists of income from ARPs and leases. Lease income was not significant for the three months ended March 31, 2024 and 2023. CERC Three Months Ended March 31, 2024 2023 (in millions) Revenue from contracts with customers $ 1,485 $ 1,700 Other (1) 27 17 Total revenues $ 1,512 $ 1,717 (1) Primarily consists of income from ARPs and leases. Lease income was not significant for the three months ended March 31, 2024 and 2023. Revenues from Contracts with Customers Electric (CenterPoint Energy and Houston Electric). Houston Electric distributes electricity to customers over time and customers consume the electricity when delivered. Indiana Electric generates, transmits and distributes electricity to customers over time and customers consume the electricity when delivered. Revenue, consisting of both volumetric and fixed tariff rates set by state regulators, such as the PUCT and the IURC, is recognized as electricity is delivered and represents amounts both billed and unbilled. Discretionary services requested by customers are provided at a point in time with control transferring upon the completion of the service. Revenue for discretionary services provided by Houston Electric is recognized upon completion of service based on the tariff rates set by the PUCT. Payments for electricity distribution and discretionary services are aggregated and received on a monthly basis. Houston Electric performs transmission services over time as a stand-ready obligation to provide a reliable network of transmission systems. Revenue is recognized upon time elapsed, and the monthly tariff rate set by the regulator. Payments are received on a monthly basis. Indiana Electric customers are billed monthly and payment terms, set by the regulator, require payment within a month of billing. Natural Gas (CenterPoint Energy and CERC). CenterPoint Energy and CERC distribute and transport natural gas to customers over time and customers consume the natural gas when delivered. Revenue, consisting of both volumetric and fixed tariff rates set by the state governing agency for that service area, is recognized as natural gas is delivered and represents amounts both billed and unbilled. Discretionary services requested by the customer are provided at a point in time with control transferring upon completion of the service. Revenue for discretionary services is recognized upon completion of service based on the tariff rates set by the applicable state regulator. Payments of natural gas distribution, transportation and discretionary services are aggregated and received on a monthly basis. Contract Balances. When the timing of delivery of service is different from the timing of the payments made by customers and when the right to consideration is conditioned on something other than the passage of time, the Registrants recognize a contract liability when customer payment precedes performance. Those customers that prepay are represented by contract liabilities until the performance obligations are satisfied. The Registrants’ contract liabilities are included in Accounts payable and Other current liabilities in their Condensed Consolidated Balance Sheets. The opening and closing balances of accounts receivable, other accrued unbilled revenues and contract liabilities from contracts with customers are as follows: CenterPoint Energy Accounts Receivable Other Accrued Unbilled Revenues Contract Liabilities (in millions) Opening balance as of December 31, 2023 $ 652 $ 516 $ 2 Closing balance as of March 31, 2024 656 392 3 Decrease $ 4 $ (124) $ 1 The amount of revenue recognized during the three months ended March 31, 2024 that was included in the opening contract liability was $1 million. The difference between the opening and closing balances of the contract liabilities primarily results from the timing difference between CenterPoint Energy’s performance and the customer’s payment. Houston Electric Accounts Receivable Other Accrued Unbilled Revenues Contract Liabilities (in millions) Opening balance as of December 31, 2023 $ 275 $ 142 $ 2 Closing balance as of March 31, 2024 250 122 3 Increase (decrease) $ (25) $ (20) $ 1 The amount of revenue recognized during the three months ended March 31, 2024 that was included in the opening contract liability was $1 million. The difference between the opening and closing balances of the contract liabilities primarily results from the timing difference between Houston Electric’s performance and the customer’s payment. CERC Accounts Receivable Other Accrued Unbilled Revenues (in millions) Opening balance as of December 31, 2023 $ 330 $ 329 Closing balance as of March 31, 2024 355 233 Decrease $ 25 $ (96) CERC does not have any opening or closing contract asset or contract liability balances. Remaining Performance Obligations (CenterPoint Energy). Following the completed sale of Energy Systems Group on June 30, 2023, CenterPoint Energy had no remaining performance obligations. Practical Expedients and Exemption. Sales taxes and other similar taxes collected from customers are excluded from the transaction price. For contracts for which revenue from the satisfaction of the performance obligations is recognized in the amount invoiced, the practical expedient was elected and revenue expected to be recognized on these contracts has not been disclosed. Allowance for Credit Losses CenterPoint Energy and CERC segregate financial assets that fall under the scope of Topic 326, primarily trade receivables due in one year or less, into portfolio segments based on shared risk characteristics, such as geographical location and regulatory environment, for evaluation of expected credit losses. Historical and current information, such as average write-offs, are applied to each portfolio segment to estimate the allowance for losses on uncollectible receivables. Additionally, the allowance for losses on uncollectible receivables is adjusted for reasonable and supportable forecasts of future economic conditions, which can include changing weather, commodity prices, regulations, and macroeconomic factors, among others. Houston Electric had no material changes in its methodology to recognize losses on financial assets that fall under the scope of Topic 326, primarily due to the nature of its customers and regulatory environment. For a discussion of regulatory deferrals, see Note 6 .

Employee Benefit Plans

Employee Benefit Plans	3 Months Ended
Employee Benefit Plans	Mar. 31, 2024
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans The Registrants’ net periodic cost, before considering amounts subject to overhead allocations for capital expenditure projects or for amounts subject to deferral for regulatory purposes, includes the following components relating to pension and postretirement benefits: Pension Benefits (CenterPoint Energy) Three Months Ended March 31, 2024 2023 (in millions) Service cost (1) $ 6 $ 6 Interest cost (2) 19 19 Expected return on plan assets (2) (19) (19) Amortization of net loss (2) 7 7 Settlement cost (2) (3) — 1 Net periodic cost $ 13 $ 14 (1) Amounts presented in the table above are included in Operation and maintenance expense in CenterPoint Energy’s Condensed Statements of Consolidated Income, net of amounts capitalized and regulatory deferrals. (2) Amounts presented in the table above are included in Other income, net in CenterPoint Energy’s Condensed Statements of Consolidated Income, net of regulatory deferrals. (3) Amounts presented represent a one-time, non-cash settlement cost, prior to regulatory deferrals, which are required when the total lump sum distributions or other settlements of plan benefit obligations during a plan year exceed the service cost and interest cost components of the net periodic cost for that year. Postretirement Benefits Three Months Ended March 31, 2024 2023 CenterPoint Energy Houston Electric CERC CenterPoint Energy Houston Electric CERC (in millions) Interest cost (1) $ 3 $ 1 $ 1 $ 3 $ 1 $ 1 Expected return on plan assets (1) (1) (1) — (1) (1) — Amortization of prior service cost (credit) (1) (1) (1) 1 — (1) 1 Amortization of net loss (1) (2) (1) (1) (2) (1) (1) Net periodic cost (benefit) $ (1) $ (2) $ 1 $ — $ (2) $ 1 (1) Amounts presented in the tables above are included in Other income (expense), net in each of the Registrants’ respective Condensed Statements of Consolidated Income, net of regulatory deferrals. The table below reflects the expected contributions to be made to the pension and postretirement benefit plans during 2024: CenterPoint Energy Houston Electric CERC (in millions) Expected contribution to pension plans during 2024 $ 9 $ — $ — Expected contribution to postretirement benefit plans in 2024 8 1 4 The table below reflects the contributions made to the pension and postretirement benefit plans during the period presented: Three Months Ended March 31, 2024 CenterPoint Energy Houston Electric CERC (in millions) Pension plans $ 2 $ — $ — Postretirement benefit plans 2 — 1

Regulatory Matters

Regulatory Matters	3 Months Ended
Regulatory Matters	Mar. 31, 2024
Regulated Operations [Abstract]
Regulatory Matters	Regulatory Matters Equity Return The Registrants are at times allowed by a regulator to defer an equity return as part of the recoverable carrying costs of a regulatory asset. A deferred equity return is capitalized for rate-making purposes, but it is not included in the Registrant’s regulatory assets on its Condensed Consolidated Balance Sheets. The allowed equity return is recognized in the Condensed Statements of Consolidated Income as it is recovered in rates. The recoverable allowed equity return not yet recognized by the Registrants is as follows: March 31, 2024 December 31, 2023 CenterPoint Energy (1) Houston Electric (2) CERC (3) CenterPoint Energy (1) Houston Electric (2) CERC (3) (in millions) Unrecognized equity return $ 204 $ 69 $ 73 $ 204 $ 75 $ 69 (1) In addition to the amounts described in (2) and (3) below, represents CenterPoint Energy’s allowed equity return on post in-service carrying cost generally associated with investments in Indiana. (2) Represents Houston Electric’s allowed equity return on its true-up balance of stranded costs, other changes and related interest resulting from the formerly integrated electric utilities prior to Texas deregulation to be recovered in rates through 2024 and certain TEEEF costs and storm restoration costs. (3) CERC’s allowed equity return on post in-service carrying cost associated with certain distribution facilities replacements expenditures in Texas and costs associated with investments in Indiana. The table below reflects the amount of allowed equity return recognized by each Registrant in its Condensed Statements of Consolidated Income: Three Months Ended March 31, 2024 2023 CenterPoint Energy Houston Electric CERC CenterPoint Energy Houston Electric CERC (in millions) Allowed equity return recognized $ 9 $ 8 $ 1 $ 8 $ 7 $ 1 February 2021 Winter Storm Event In February 2021, certain of the Registrants’ jurisdictions experienced an extreme and unprecedented winter weather event that resulted in prolonged freezing temperatures, which impacted their businesses. The February 2021 Winter Storm Event impacted wholesale prices of CenterPoint Energy’s and CERC’s natural gas purchases and their ability to serve customers in their Natural Gas service territories, including due to the reduction in available natural gas capacity and impacts to CenterPoint Energy’s and CERC’s natural gas supply portfolio activities, and the effects of weather on their systems and their ability to transport natural gas, among other things. The overall natural gas market, including the markets from which CenterPoint Energy and CERC sourced a significant portion of their natural gas for their operations, experienced significant impacts caused by the February 2021 Winter Storm Event, resulting in extraordinary increases in the cost of natural gas purchased by CenterPoint Energy and CERC of approximately $2 billion. CenterPoint Energy and CERC have completed recovery of natural gas costs in Mississippi, Indiana and Texas, and continue to recover the natural gas cost in Louisiana and Minnesota. As of March 31, 2024, CenterPoint Energy and CERC have each recorded current regulatory assets of $69 million and non-current regulatory assets of $104 million associated with the February 2021 Winter Storm Event. As of December 31, 2023, CenterPoint Energy and CERC had each recorded current regulatory assets of $86 million and non-current regulatory assets of $130 million associated with the February 2021 Winter Storm Event. On August 24, 2023, the LPSC Staff issued an audit report which recommends some prospective process changes to the gas supply bid process and did not recommend any disallowance of February 2021 Winter Storm Event gas costs incurred in Louisiana. Recovery of such costs remains subject to LPSC approval. On December 19, 2023, the LPSC issued an order which accepted and approved the audit report. As of both March 31, 2024 and December 31, 2023, as authorized by the PUCT, both CenterPoint Energy and Houston Electric recorded a regulatory asset of $8 million for bad debt expenses resulting from REPs’ default on their obligation to pay delivery charges to Houston Electric net of collateral. Additionally, both CenterPoint Energy and Houston Electric recorded a regulatory asset of $18 million and $17 million as of both March 31, 2024 and December 31, 2023, respectively, and have requested reimbursement of costs associated with the February 2021 Winter Storm Event in Houston Electric’s rate case. See Note 13(c) for further information regarding litigation related to the February 2021 Winter Storm Event. Texas Public Securitization The Texas Natural Gas Securitization Finance Corporation issued customer rate relief bonds in March 2023, and on March 23, 2023, CenterPoint Energy and CERC, collectively, received approximately $1.1 billion in cash proceeds from the issuance and sale of the state’s customer rate relief bonds. The proceeds from the state’s customer rate relief bonds included carrying costs incurred through August 2022. Incremental carrying costs incurred after August 2022 until the date the proceeds were received are recorded in a separate regulatory asset; the current CERC rate proceeding in Texas includes a request for recovery of this regulatory asset. As CenterPoint Energy and CERC have no future financial obligations for the repayment of the state’s customer rate relief bonds, the customer rate relief bonds are not recorded on CenterPoint Energy’s or CERC’s balance sheets. The $1.1 billion in cash proceeds from the state’s customer rate relief bonds is considered to be a government grant. The state’s customer rate relief bonds are backed in part by customer rate relief property, including customer rate relief charges, which are non-bypassable uniform monthly volumetric charges to be paid by all existing and future sales customers as a component of each regulated utility’s gas cost, separate from their base rate. CERC only acts as a collection agent, whose duties include management, servicing and administration of a portion of the customer rate relief property which is associated with the customer rate relief charge imposed on customers of CERC under the guidance and direction from the Railroad Commission. The Texas Natural Gas Securitization Finance Corporation, and not CenterPoint Energy or CERC, is the owner of the customer rate relief property. The assets of the Texas Natural Gas Securitization Finance Corporation are not available to pay creditors of CenterPoint Energy, CERC, or their affiliates. While the customer rate relief charges will be included by CERC in their monthly billings, the billing amount is established by the Railroad Commission. CERC will remit all customer rate relief charges collected to the financing entity set up by the Railroad Commission. Therefore, the collection and servicing of customer rate relief charges have no impact on the respective Condensed Statements of Consolidated Income of CenterPoint Energy or CERC. As U.S. generally accepted accounting principles have no specific accounting guidance for government grants or assistance, the cash proceeds from the state’s customer rate relief bonds were accounted for as a government grant by analogy to the grant model under IAS 20—Accounting for Government Grants and Disclosures of Government Assistance. CenterPoint Energy and CERC reflect the proceeds from the grant as a deduction to natural gas costs and recognized the $1.1 billion of cash proceeds from the state’s customer rate relief bonds within Utility natural gas expense on their respective Condensed Statements of Consolidated Income in the three months ended March 31, 2023, net of the recognition of natural gas cost related to relieving CenterPoint Energy and CERC’s regulatory assets related to the February 2021 Winter Storm Event in the same period. Indiana Electric Securitization of Generation Retirements (CenterPoint Energy) On January 4, 2023, the IURC issued an order in accordance with Indiana Senate Enrolled Act 386 authorizing the issuance of up to $350 million in securitization bonds to securitize qualified costs associated with the retirements of Indiana Electric’s A.B. Brown coal-fired generation facilities. Accordingly, CenterPoint Energy determined that the retirement of property, plant and equipment became probable upon the issuance of the order. No loss on abandonment was recognized in connection with issuance of the order as there was no disallowance of all or part of the cost of the abandoned property, plant and equipment. In the first quarter of 2023, upon receipt of the order, CenterPoint Energy reclassified property, plant and equipment to be recovered through securitization to a regulatory asset and such amounts continued to earn a full return until recovered through securitization. The SIGECO Securitization Subsidiary issued $341 million aggregate principal amount of the SIGECO Securitization Bonds on June 29, 2023. The SIGECO Securitization Subsidiary used a portion of the net proceeds from the issuance of the SIGECO Securitization Bonds to purchase the securitization property from SIGECO. No gain or loss was recognized. The SIGECO Securitization Bonds are secured by the securitization property, which includes the right to recover, through non-bypassable securitization charges payable by SIGECO’s retail electric customers, the qualified costs of SIGECO authorized by the IURC order. SIGECO has no payment obligations with respect to the SIGECO Securitization Bonds except to remit collections of securitization charges as set forth in a servicing agreement between SIGECO and the SIGECO Securitization Subsidiary. The non-bypassable securitization charges are subject to a true-up mechanism. Houston Electric TEEEF Pursuant to legislation passed in 2021, Houston Electric entered into two leases for TEEEF (mobile generation) which are detailed in Note 19. Houston Electric initially sought recovery of the lease costs and the applicable return as of December 31, 2021 under these lease agreements of approximately $200 million in its DCRF application filed with the PUCT on April 5, 2022, and subsequently amended on July 1, 2022, to show mobile generation in a separate Rider TEEEF. A final order was issued on April 5, 2023 approving a revenue requirement of $39 million that results in full recovery of costs requested but lengthens the amortization period for the short-term lease to be collected over 82.5 months. On May 25, 2023, the PUCT issued its order on rehearing which clarified some of the findings, but did not change the approval of TEEEF cost recovery. Additional motions for rehearing were filed and the PUCT issued an order on August 3, 2023 denying the motions for rehearing. The deadline for a party to file a judicial appeal of the PUCT’s decision was September 5, 2023, and no appeal was filed. As such, the PUCT’s decision on the first TEEEF filing is now final and non-appealable. On April 5, 2023, Houston Electric made its second TEEEF filing requesting recovery of TEEEF related costs incurred through December 31, 2022. Houston Electric requested a new annual revenue requirement of approximately $188 million u sing 78 months to amortize the related deferred costs for proposed rates beginning September 2023, a net increase in TEEEF revenues of approximately $149 million . On July 18, 2023, the PUCT referred the case to the State Office of Administrative Hearings and on August 28, 2023, the State Office of Administrative Hearings issued an Order setting interim rates to collect an annual revenue requirement at the filed amount. Interim rates became effective on September 1, 2023 and are subject to surcharge or refund if they differ from the final rates approved by the PUCT. On October 12, 2023, a joint motion to abate was filed because the parties reached an agreement in principle on all issues. The agreement in principle reduces the annual revenue requirement by approximately $35 million based on recovering the balance as of December 31, 2022 over a 102 month amortization period (instead of the 78 month period in the initial filing) and also allows for revised interim rates (to incorporate the agreement in principle and the initial interim rates that have been in place since September 1, 2023). The updated interim rates were implemented December 15, 2023. Pursuant to its order issued on February 1, 2024, the PUCT approved the agreement in principle. Houston Electric defers costs associated with the short-term and long-term leases that are probable of recovery and would otherwise be charged to expense in a regulatory asset, including allowed debt returns, and determined that such regulatory assets remain probable of recovery as of March 31, 2024. Right of use finance lease assets, such as assets acquired under the long-term leases, are evaluated for impairment under the long-lived asset impairment model by assessing if a capital disallowance from a regulator is probable through monitoring the outcome of rate cases and other proceedings. Houston Electric continues to monitor the on-going proceedings and has not recorded any impairments on its right of use assets in the year ended December 31, 2023 or the three months ended March 31, 2024. See Note 19 for further information.

Derivative Instruments

Derivative Instruments	3 Months Ended
Derivative Instruments	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments The Registrants are exposed to various market risks. These risks arise from transactions entered into in the normal course of business. The Registrants, from time to time, utilize derivative instruments such as swaps and options to mitigate the impact of changes in commodity prices, weather and interest rates on operating results and cash flows. (a) Non-Trading Activities Commodity Derivative Instruments (CenterPoint Energy and CERC). CenterPoint Energy and CERC, through the Indiana Utilities they respectively own, enter into certain derivative instruments to mitigate the effects of commodity price movements. Outstanding derivative instruments designated as economic hedges at the Indiana Utilities hedge long-term variable rate natural gas purchases. The Indiana Utilities have authority to refund and recover mark-to-market gains and losses associated with hedging natural gas purchases, and thus the gains and losses on derivatives are deferred in a regulatory liability or asset. All other financial instruments do not qualify or are not designated as cash flow or fair value hedges. Interest Rate Risk Derivative Instruments (CenterPoint Energy and Houston Electric). From time to time, the Registrants may enter into interest rate derivatives that are designated as economic or cash flow hedges. The objective of these hedges is to offset risk associated with interest rates borne by the Registrants in connection with an anticipated future fixed rate debt offering or other exposure to variable rate debt. Houston Electric and the Indiana Utilities have authority to refund and recover mark-to-market gains and losses associated with hedging financing activity, and thus the gains and losses on derivatives are deferred in a regulatory liability or asset. The table below summarizes CenterPoint Energy’s and Houston Electric’s outstanding interest rate hedging activity: March 31, 2024 December 31, 2023 Hedging Classification Notional Principal (in millions) CenterPoint Energy: Cash flow hedge (1) (2) 150 200 Houston Electric: Cash flow hedge (2) — 100 (1) Relates to interest rate derivative instruments at CenterPoint Energy with a termination date of December 31, 2029. The interest rate swap agreements were designated as cash flow hedges of forecasted transactions. CenterPoint Energy records all changes in the fair value of cash flow hedges in accumulated other comprehensive income (loss) until the underlying hedged transaction occurs, when it reclassifies that amount into earnings. (2) Relates to interest rate derivative instruments at Houston Electric with a termination date of June 28, 2024. The interest rate treasury lock agreements were designated as cash flow hedges of forecasted transactions. Houston Electric records all changes in the fair value of cash flow hedges to a regulatory asset or liability, which is amortized over the life of the associated debt being hedged. (b) Derivative Fair Values and Financial Statement Presentation CenterPoint Energy’s outstanding interest rate derivatives designated as cash flow hedges are included in current Non-trading derivative assets on CenterPoint Energy’s Condensed Consolidated Balance Sheets as of March 31, 2024. CenterPoint Energy’s interest rate derivatives designated as cash flow hedges were not material as of December 31, 2023 and were included in current Non-trading derivative liabilities on CenterPoint Energy’s Condensed Consolidated Balance Sheets. Houston Electric’s interest rate derivatives designated as cash flow hedges were not material as of December 31, 2023 and were included in Prepaid expenses and other current assets on Houston Electric’s Condensed Consolidated Balance Sheets. The following tables provide a balance sheet overview of CenterPoint Energy’s and CERC’s derivative assets and liabilities, while the last table provides a breakdown of the related income statement impacts. March 31, 2024 December 31, 2023 Balance Sheet Location Derivative Derivative Liabilities Derivative Derivative Liabilities CenterPoint Energy: (in millions) Derivatives designated as cash flow hedges: Interest rate derivatives Current Assets: Non-trading derivative assets $ 3 $ — $ — $ — Derivatives not designated as hedging instruments: Natural gas derivatives (1) Current Liabilities: Non-trading derivative liabilities $ — $ 9 $ — $ 9 Natural gas derivatives (1) Other Liabilities: Non-trading derivative liabilities — 3 — 3 Indexed debt securities derivative (2) Current Liabilities — 520 — 605 Total $ 3 $ 532 $ — $ 617 (1) Natural gas contracts are subject to master netting arrangements. This netting applies to all undisputed amounts due or past due. However, the mark-to-market fair value of each natural gas contract is in a liability position with no offsetting amounts as of March 31, 2024 and December 31, 2023, respectively. As of March 31, 2024 and December 31, 2023, the notional volume of natural gas derivatives were 20,712 MMBtu per day and 27,421 MMBtu per day, respectively. (2) Derivative component of the ZENS obligation that represents the ZENS holder’s option to receive the appreciated value of the reference shares at maturity and other payments to which they may be entitled. See Note 10 for further information. March 31, 2024 December 31, 2023 Balance Sheet Location Derivative Derivative Liabilities Derivative Derivative Liabilities CERC: (in millions) Derivatives not designated as hedging instruments: Natural gas derivatives (1) Current Liabilities: Non-trading derivative liabilities $ — $ 8 $ — $ 8 Natural gas derivatives (1) Other Liabilities: Non-trading derivative liabilities — 2 — 3 Total $ — $ 10 $ — $ 11 (1) Natural gas contracts are subject to master netting arrangements. This netting applies to all undisputed amounts due or past due. However, the mark-to-market fair value of each natural gas contract is in a liability position with no offsetting amounts as of March 31, 2024 and December 31, 2023, respectively. As of March 31, 2024 and December 31, 2023, the notional volume of natural gas derivatives were 17,753 MMBtu per day and 23,504 MMBtu per day, respectively. The table below provides the related income statement impacts of derivative activity for the periods presented: Three Months Ended March 31, Income Statement Location 2024 2023 CenterPoint Energy: (in millions) Derivatives not designated as hedging instruments: Indexed debt securities derivative (1) Gain (loss) on indexed debt securities $ 85 $ (39) (1) The indexed debt securities derivative is recorded at fair value and changes in the fair value are recorded in CenterPoint Energy’s Condensed Statements of Consolidated Income. Cash inflows and outflows associated with derivatives are included in operating activities on the statement of cash flows. (c) Credit Risk Contingent Features (CenterPoint Energy and CERC) Certain of CenterPoint Energy’s and CERC’s derivative instruments contain provisions that require CenterPoint Energy and CERC to maintain an investment grade credit rating on their respective long-term unsecured unsubordinated debt from S&P and Moody’s. If CenterPoint Energy’s or CERC’s debt were to fall below investment grade, it would be in violation of these provisions, and the counterparties to the derivative instruments could request immediate payment or additional collateral. The table below sets forth additional detail for the periods presented: March 31, 2024 December 31, 2023 CenterPoint Energy CERC CenterPoint Energy CERC (in millions) Aggregate fair value of derivatives containing material adverse change provisions in a net liability position $ 9 $ 8 $ 9 $ 8 Fair value of collateral already posted — — — — Additional collateral required to be posted if credit risk contingent features triggered 9 8 9 8

Fair Value Measurements

Fair Value Measurements	3 Months Ended
Fair Value Measurements	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Assets and liabilities that are recorded at fair value in the Registrants’ Condensed Consolidated Balance Sheets are categorized based upon the level of judgment associated with the inputs used to measure their value. Hierarchical levels, as defined below and directly related to the amount of subjectivity associated with the inputs to fair valuations of these assets and liabilities, are as follows: Level 1: Inputs are unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date. The types of assets carried at Level 1 fair value generally are exchange-traded derivatives and equity securities. Level 2: Inputs, other than quoted prices included in Level 1, are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices for similar instruments in active markets and inputs other than quoted prices that are observable for the asset or liability. Fair value assets and liabilities that are generally included in this category are derivatives with fair values based on inputs from actively quoted markets. A market approach is utilized to value the Registrants’ Level 2 natural gas derivative assets or liabilities. CenterPoint Energy’s Level 2 indexed debt securities derivative is valued using an option model and a discounted cash flow model, which uses projected dividends on the ZENS-Related Securities and a discount rate as observable inputs. Level 3: Inputs are unobservable for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. Unobservable inputs reflect the Registrants’ judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. The Registrants develop these inputs based on the best information available, including the Registrants’ own data. The Registrants determine the appropriate level for each financial asset and liability on a quarterly basis. The following tables present information about the Registrants’ assets and liabilities measured at fair value on a recurring basis as of March 31, 2024 and December 31, 2023 and indicate the fair value hierarchy of the valuation techniques utilized by the Registrants to determine such fair value. CenterPoint Energy March 31, 2024 December 31, 2023 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets (in millions) Equity securities $ 458 $ — $ — $ 458 $ 541 $ — $ — $ 541 Investments, including money market funds (1) 37 — — 37 31 — — 31 Interest rate derivatives — 3 — 3 — — — — Total assets $ 495 $ 3 $ — $ 498 $ 572 $ — $ — $ 572 Liabilities Indexed debt securities derivative $ — $ 520 $ — $ 520 $ — $ 605 $ — $ 605 Natural gas derivatives — 12 — 12 — 12 — 12 Total liabilities $ — $ 532 $ — $ 532 $ — $ 617 $ — $ 617 Houston Electric March 31, 2024 December 31, 2023 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets (in millions) Investments, including money market funds (1) $ 21 $ — $ — $ 21 $ 14 $ — $ — $ 14 Total assets $ 21 $ — $ — $ 21 $ 14 $ — $ — $ 14 CERC March 31, 2024 December 31, 2023 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets (in millions) Investments, including money market funds (1) $ 15 $ — $ — $ 15 $ 15 $ — $ — $ 15 Total assets $ 15 $ — $ — $ 15 $ 15 $ — $ — $ 15 Liabilities Natural gas derivatives $ — $ 10 $ — $ 10 $ — $ 11 $ — $ 11 Total liabilities $ — $ 10 $ — $ 10 $ — $ 11 $ — $ 11 (1) Amounts are included in Prepaid expenses and other current assets in the Condensed Consolidated Balance Sheets. Items Measured at Fair Value on a Nonrecurring Basis As a result of classifying the Louisiana and Mississippi natural gas LDC businesses as held for sale, CenterPoint Energy and CERC used a market approach consisting of contractual sales price adjusted for estimated working capital and other contractual purchase price adjustments to determine the fair value of the businesses classified as held for sale, which are Level 2 inputs. Neither CenterPoint Energy nor CERC recognized any gains or losses upon classification as held for sale during the three months ended March 31, 2024. See Note 3 for further information. Estimated Fair Value of Financial Instruments The fair values of cash and cash equivalents, investments in debt and equity securities measured at fair value and short-term borrowings are estimated to be approximately equivalent to carrying amounts and have been excluded from the table below. The carrying amounts of non-trading derivative assets and liabilities and CenterPoint Energy’s ZENS indexed debt securities derivative are stated at fair value and are excluded from the table below. The fair value of each debt instrument is determined by multiplying the principal amount of each debt instrument by a combination of historical trading prices and comparable issue data. These liabilities, which are not measured at fair value in the Registrants’ Condensed Consolidated Balance Sheets, but for which the fair value is disclosed, would be classified as Level 2 in the fair value hierarchy. March 31, 2024 December 31, 2023 CenterPoint Energy (1) Houston Electric (1) CERC CenterPoint Energy (1) Houston Electric (1) CERC Long-term debt, including current maturities (in millions) Carrying amount $ 19,145 $ 7,984 $ 4,719 $ 18,609 $ 7,587 $ 4,670 Fair value 18,020 7,115 4,599 17,804 6,917 4,627 (1) Includes Securitization Bonds, as applicable.

Goodwill (CenterPoint Energy an

Goodwill (CenterPoint Energy and CERC)	3 Months Ended
Goodwill (CenterPoint Energy and CERC)	Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill (CenterPoint Energy and CERC)	Goodwill (CenterPoint Energy and CERC) CenterPoint Energy’s goodwill by reportable segment as of both March 31, 2024 and December 31, 2023 is as follows: December 31, 2023 Held For Sale March 31, 2024 (in millions) Electric (1) $ 936 $ — $ 936 Natural gas (2) 2,920 217 2,703 Corporate and other 304 — 304 Total $ 4,160 $ 217 $ 3,943 (1) Amount presented is net of the accumulated goodwill impairment charge of $185 million recorded in 2020. (2) If a disposal group reflects a component of a reporting unit and meets the definition of a business, the goodwill within that reporting unit is allocated to the disposal group based on the relative fair value of the components representing a business that will be retained and disposed. As a result, goodwill attributable to the Louisiana and Mississippi natural gas LDC businesses to be disposed of is classified as held for sale as of March 31, 2024. CenterPoint Energy has not recognized any goodwill impairments within the Natural Gas reportable segment during the three months ended March 31, 2024. For further information, see Note 3. CERC’s goodwill as of both March 31, 2024 and December 31, 2023 is as follows: December 31, 2023 Held For Sale March 31, 2024 (in millions) Goodwill (1) $ 1,583 $ 122 $ 1,461 (1) In connection with the classification of the Louisiana and Mississippi natural gas LDC businesses as held for sale as of March 31, 2024 described above, goodwill attributable to CERC to be disposed of as part of the transaction is classified as held for sale as of March 31, 2024. CERC has not recognized any goodwill impairments during the three months ended March 31, 2024. For further information, see Note 3. CenterPoint Energy and CERC perform goodwill impairment tests at least annually and evaluate goodwill when events or changes in circumstances indicate that its carrying value may not be recoverable. The impairment evaluation for goodwill is performed by comparing the fair value of each reporting unit with the carrying amount of the reporting unit, including goodwill. The reporting units approximate the reportable segments, with the exception of Energy Systems Group, which was a separate reporting unit but was included in Corporate and Other at CenterPoint Energy. The estimated fair value of the reporting unit is primarily determined based on an income approach or a weighted combination of income and market approaches. If the carrying amount is in excess of the estimated fair value of the reporting unit, then the excess amount is recorded as an impairment charge, not to exceed the carrying amount of goodwill.

Equity Securities and Indexed D

Equity Securities and Indexed Debt Securities (ZENS) (CenterPoint Energy)	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Equity Securities and Indexed Debt Securities (ZENS) (CenterPoint Energy)	Equity Securities and Indexed Debt Securities (ZENS) (CenterPoint Energy) (a) Equity Securities Gains and losses on equity securities, net of transaction costs, are recorded in Gain (loss) on equity securities in CenterPoint Energy’s Condensed Statements of Consolidated Income. The following table presents unrealized gains (losses), net on equity securities owned by CenterPoint Energy for each period presented: Three Months Ended March 31, 2024 2023 (in millions) AT&T Common $ 9 $ 9 Charter Common (85) 16 WBD Common (7) 14 Other — (1) Total gains (losses) on equity securities, net $ (83) $ 38 CenterPoint Energy and its subsidiaries hold shares of certain securities detailed in the table below, which are classified as trading securities. Shares of AT&T Common, Charter Common and WBD Common are expected to be held to facilitate CenterPoint Energy’s ability to meet its obligation under the ZENS. The following table presents information on CenterPoint Energy’s equity securities for each period presented: Shares Held Carrying Value March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 (in millions) AT&T Common 10,212,945 10,212,945 $ 180 $ 171 Charter Common 872,503 872,503 254 339 WBD Common 2,470,685 2,470,685 21 28 Other 3 3 Total $ 458 $ 541 (b) ZENS In September 1999, CenterPoint Energy issued ZENS having an original principal amount of $1.0 billion of which $828 million remained outstanding as of March 31, 2024. Each ZENS is exchangeable at the holder’s option at any time for an amount of cash equal to 95% of the market value of the reference shares attributable to such note. The number and identity of the reference shares attributable to each ZENS are adjusted for certain corporate events. CenterPoint Energy’s reference shares for each ZENS consisted of the following: March 31, 2024 December 31, 2023 (in shares) AT&T Common 0.7185 0.7185 Charter Common 0.061382 0.061382 WBD Common 0.173817 0.173817 CenterPoint Energy pays interest on the ZENS at an annual rate of 2% plus the amount of any quarterly cash dividends paid in respect of the reference shares attributable to the ZENS. The principal amount of the ZENS is subject to increases or decreases to the extent that the annual yield from interest and cash dividends on the reference shares attributable to the ZENS is less than or more than 2.309%. The adjusted principal amount is defined in the ZENS instrument as “contingent principal.” As of March 31, 2024, the ZENS, having an original principal amount of $828 million and a contingent principal amount of $15 million, were outstanding and were exchangeable, at the option of the holders, for cash equal to 95% of the market value of the reference shares attributable to the ZENS.

Short-term Borrowings and Long-

Short-term Borrowings and Long-term Debt	3 Months Ended
Short-term Borrowings and Long-term Debt	Mar. 31, 2024
Debt Disclosure [Abstract]
Short-term Borrowings and Long-term Debt	Short-term Borrowings and Long-term Debt Inventory Financing. CenterPoint Energy’s and CERC’s Natural Gas businesses utilize third-party AMAs associated with their utility distribution service in Indiana, Louisiana, Minnesota, Mississippi and Texas. The AMAs have varying terms, the longest of which expires in 2029. Pursuant to the provisions of the agreements, CenterPoint Energy’s and CERC’s Natural Gas either sells natural gas to the asset manager and agrees to repurchase an equivalent amount of natural gas throughout the year at the same cost, or simply purchases its full natural gas requirements at each delivery point from the asset manager. Certain of these transactions are accounted for as an inventory financing. CenterPoint Energy and CERC had no outstanding obligations related to the AMAs as of March 31, 2024 and $4 million as of December 31, 2023, recorded in Short-term borrowings on CenterPoint Energy’s and CERC’s Condensed Consolidated Balance Sheets. Debt Issuance. In February 2024, CenterPoint Energy, through its wholly-owned subsidiary Houston Electric, issued $400 million aggregate principal amount of 5.15% general mortgage bonds due 2034. Total proceeds, net of transaction expenses and fees, were approximately $395 million, which will be used for general limited liability company purposes, including capital expenditures and working capital purposes. Convertible Senior Notes. Interest on the Convertible Notes is payable semiannually in arrears on February 15 and August 15 of each year, beginning on February 15, 2024. The Convertible Notes will mature on August 15, 2026, unless earlier converted or repurchased by CenterPoint Energy in accordance with their terms. Prior to the close of business on the business day immediately preceding May 15, 2026, the Convertible Notes are convertible only under certain conditions. On or after May 15, 2026 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders of the Convertible Notes may convert all or any portion of their Convertible Notes at any time at the conversion rate then in effect, irrespective of the conditions. CenterPoint Energy may not redeem the Convertible Notes prior to the maturity date and no sinking fund is provided for the Convertible Notes. Upon conversion of the Convertible Notes, CenterPoint Energy will pay cash up to the aggregate principal amount of the Convertible Notes to be converted and pay or deliver, as the case may be, cash, shares of Common Stock, or a combination of cash and shares of Common Stock, at CenterPoint Energy’s election, in respect of the remainder, if any, of CenterPoint Energy’s conversion obligation in excess of the aggregate principal amount of the Convertible Notes being converted. The conversion rate for the Convertible Notes is initially 27.1278 shares of Common Stock per $1,000 principal amount of Convertible Notes (equivalent to an initial conversion price of approximately $36.86 per share of Common Stock). The initial conversion price of the Convertible Notes represents a premium of approximately 25.0% over the last reported sale price of the Common Stock on the New York Stock Exchange on August 1, 2023. Initially, a maximum of 33,909,700 shares of Common Stock may be issued upon conversion of the Convertible Notes based on the initial maximum conversion rate of 33.9097 shares of Common Stock per $1,000 principal amount of Convertible Notes. The conversion rate will be subject to adjustment in some events (as described in the Convertible Notes Indenture) but will not be adjusted for any accrued and unpaid interest. In addition, following certain corporate events that occur prior to the maturity date of the Convertible Notes, CenterPoint Energy will, in certain circumstances, increase the conversion rate for a holder of Convertible Notes who elects to convert its Convertible Notes in connection with such a corporate event. If CenterPoint Energy undergoes a fundamental change (as described in the Convertible Notes Indenture), holders of the Convertible Notes may require CenterPoint Energy to repurchase for cash all or any portion of their Convertible Notes at a fundamental change repurchase price equal to 100% of the principal amount of the Convertible Notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date. The Convertible Notes are senior unsecured obligations of CenterPoint Energy and rank senior in right of payment to any of CenterPoint Energy’s indebtedness that is expressly subordinated in right of payment to the Convertible Notes; equal in right of payment to any of CenterPoint Energy’s unsecured indebtedness that is not so subordinated; effectively junior in right of payment to any of CenterPoint Energy’s secured indebtedness it may incur in the future to the extent of the value of the assets securing such future secured indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables but excluding intercompany obligations and liabilities of a type not required to be reflected on a balance sheet of such subsidiaries in accordance with generally accepted accounting principles) of CenterPoint Energy’s subsidiaries. Debt Redemption. In March 2024, CenterPoint Energy, through its wholly-owned subsidiary SIGECO, redeemed $22 million aggregate principal amount of SIGECO’s outstanding 3.50% first mortgage bonds due 2024 at a redemption price equal to 100% of the principal amount of the first mortgage bonds to be redeemed plus accrued and unpaid interest thereon. Credit Facilities . The Registrants had the following revolving credit facilities as of March 31, 2024: Execution Registrant Size of Draw Rate of SOFR plus (1) Financial Covenant Limit on Debt for Borrowed Money to Capital Ratio Debt for Borrowed Money to Capital Ratio as of March 31, 2024 (2) Termination Date (in millions) December 6, 2022 CenterPoint Energy $ 2,400 1.500% 65.0% (3) 59.6% December 6, 2027 December 6, 2022 CenterPoint Energy (4) 250 1.125% 65.0% 46.7% December 6, 2027 December 6, 2022 Houston Electric 300 1.250% 67.5% (3) 52.9% December 6, 2027 December 6, 2022 CERC 1,050 1.125% 65.0% 39.9% December 6, 2027 Total $ 4,000 (1) Based on credit ratings as of March 31, 2024. (2) As defined in the revolving credit facility agreements, excluding Securitization Bonds. (3) For CenterPoint Energy and Houston Electric, the financial covenant limit will temporarily increase to 70% if Houston Electric experiences damage from a natural disaster in its service territory and CenterPoint Energy certifies to the administrative agent that Houston Electric has incurred system restoration costs reasonably likely to exceed $100 million in a consecutive 12-month period, all or part of which Houston Electric intends to seek to recover through securitization financing. Such temporary increase in the financial covenant would be in effect from the date CenterPoint Energy delivers its certification until the earliest to occur of (i) the completion of the securitization financing, (ii) the first anniversary of CenterPoint Energy’s certification or (iii) the revocation of such certification. (4) This credit facility was issued by SIGECO. The Registrants, as well as the subsidiaries of CenterPoint Energy discussed above, were in compliance with all financial debt covenants as of March 31, 2024. The table below reflects the utilization of the Registrants’ respective revolving credit facilities: March 31, 2024 December 31, 2023 Registrant Loans Letters Commercial Weighted Average Interest Rate Loans Letters Commercial Weighted Average Interest Rate (in millions, except weighted average interest rate) CenterPoint Energy $ — $ — $ 1,145 5.49 % $ — $ — $ 1,036 5.54 % CenterPoint Energy (1) — — — — % — — — — % Houston Electric — — — — % — — — — % CERC — 1 532 5.47 % — 1 484 5.53 % Total $ — $ 1 $ 1,677 $ — $ 1 $ 1,520 (1) This credit facility was issued by SIGECO. (2) CenterPoint Energy’s and CERC’s outstanding commercial paper generally have maturities of up to 60 days and 30 days, respectively, and are backstopped by the respective issuer’s long-term revolving credit facility. Neither Houston Electric nor SIGECO has a commercial paper program. Liens. As of March 31, 2024, Houston Electric’s assets were subject to liens securing approximately $8 billion of general mortgage bonds outstanding under the General Mortgage, including approximately $68 million held in trust to secure pollution control bonds that mature in 2028 for which CenterPoint Energy is obligated. The general mortgage bonds that are held in trust to secure pollution control bonds are not reflected in Houston Electric’s consolidated financial statements because of the contingent nature of the obligations. Houston Electric may issue additional general mortgage bonds on the basis of retired bonds, 70% of property additions or cash deposited with the trustee. Houston Electric could issue approximately $4.6 billion of additional general mortgage bonds on the basis of retired bonds and 70% of property additions as of March 31, 2024. No first mortgage bonds are outstanding under the M&DOT, and Houston Electric is contractually obligated to not issue any additional first mortgage bonds under the M&DOT and is undertaking actions to release the lien of the M&DOT and terminate the M&DOT. As of March 31, 2024, SIGECO had approximately $825 million aggregate principal amount of first mortgage bonds outstanding. Generally, all of SIGECO’s real and tangible property is subject to the lien of SIGECO’s mortgage indenture which was amended and restated effective as of January 1, 2023. As of March 31, 2024, SIGECO was permitted to issue additional bonds under its mortgage indenture up to 70% of then currently unfunded property additions and approximately $966 million of additional first mortgage bonds could be issued on this basis.

Income Taxes

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Registrants reported the following effective tax rates: Three Months Ended March 31, 2024 2023 CenterPoint Energy (1) 18 % 19 % Houston Electric (2) 20 % 23 % CERC (3) 19 % 22 % (1) CenterPoint Energy’s lower effective tax rate for the three months ended March 31, 2024 compared to the same period ended March 31, 2023 was primarily due to the tax impacts of the state deferred remeasurement benefit of $25 million related to the Louisiana and Mississippi natural gas LDC businesses sale, which met the held for sale criteria in the first quarter of 2024 and is described further below. This was partially offset by the tax impacts of the valuation allowance of $21 million established against Louisiana and Mississippi NOLs, since those NOLs will not be utilized due to the Louisiana and Mississippi natural gas LDC businesses sale. See Note 3 for further details. (2) Houston Electric’s lower effective tax rate for the three months ended March 31, 2024 compared to the same period ended March 31, 2023 was primarily driven by a decrease in state income taxes and an increase in EDIT amortization. (3) CERC’s lower effective tax rate for the three months ended March 31, 2024 compared to the same period ended March 31, 2023 was primarily driven by the tax impacts of the state deferred remeasurement benefit of $24 million associated with the Louisiana and Mississippi natural gas LDC businesses sale meeting the held for sale criteria in the first quarter of 2024. For tax purposes, when the held for sale criteria is met, the CERC and unitary state apportionment rates must be updated to account for the sale and applied to the estimated post-sale net deferred tax liability. This impact was partially offset by the tax impacts of a valuation allowance of $21 million against Louisiana and Mississippi NOLs, since those NOLs will not be utilized due to the Louisiana and Mississippi natural gas LDC businesses sale. Additionally, state income tax expense has decreased as a result of higher revenues in states with lower tax rates. CenterPoint Energy reported a net uncertain tax liability, inclusive of interest and penalties, of $30 million as of March 31, 2024. The Registrants believe that it is reasonably possible that the Registrants will recognize a $3 million tax benefit, including penalties and interest, in the next 12 months as a result of a lapse of statutes on the 2020 Indiana state return. Tax Audits and Settlements . Tax years through 2018 and tax year 2021 have been audited and settled with the IRS for CenterPoint Energy. Tax years 2019-2020 remain open. For the 2021-2023 tax years, the Registrants are participants in the IRS’s Compliance Assurance Process. Vectren’s pre-Merger 2014-2019 tax years have been audited and settled with the IRS.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies (a) Purchase Obligations (CenterPoint Energy and CERC) Commitments include minimum purchase obligations related to CenterPoint Energy’s and CERC’s Natural Gas reportable segment and CenterPoint Energy’s Electric reportable segment. A purchase obligation is defined as an agreement to purchase goods or services that is enforceable and legally binding on the registrant and that specifies all significant terms, including: fixed or minimum quantities to be purchased; fixed, minimum or variable price provisions; and the approximate timing of the transaction. Contracts with minimum payment provisions have various quantity requirements and durations and are not classified as non-trading derivative assets and liabilities in CenterPoint Energy’s and CERC’s Condensed Consolidated Balance Sheets as of March 31, 2024 and December 31, 2023. These contracts meet an exception as “normal purchases contracts” or do not meet the definition of a derivative. Natural gas and coal supply commitments also include transportation contracts that do not meet the definition of a derivative. On February 1, 2023, Indiana Electric entered into an amended and restated BTA to purchase the 191 MW Posey Solar project for a fixed purchase price over the anticipated 35-year life. On February 7, 2023, Indiana Electric filed a CPCN with the IURC to approve the amended BTA. With the passage of the IRA, Indiana Electric can now pursue PTCs for solar projects. Indiana Electric filed the updated CPCN with a request that project costs, net of PTCs, be recovered in rate base, through base rates or the CECA mechanism, depending on which provides more timely recovery. On September 6, 2023, the IURC issued an order approving the CPCN. The Posey Solar project is expected to be placed in service in 2025. On January 11, 2023, the IURC issued an order approving the settlement agreement granting Indiana Electric a CPCN to purchase and acquire the 130 MW Pike County solar project through a BTA and approved the estimated cost. The IURC also designated the project as a clean energy project as well as approved the proposed levelized rate and associated ratemaking and accounting treatment. Due to inflationary pressures, the developer disclosed that costs have exceeded the agreed upon levels in the BTA. After negotiations, Indiana Electric and the developer were not able to agree upon updated pricing. As a result, on February 27, 2024, Indiana Electric provided notice that it was exercising its right to terminate the BTA, which terminated all further obligations of Indiana Electric with respect to the project. As of March 31, 2024, other than discussed below, minimum purchase obligations were approximately: CenterPoint Energy CERC Natural Gas Supply Electric Supply (1) Other (2) Natural Gas Supply (in millions) Remaining nine months of 2024 $ 427 $ 117 $ 117 $ 423 2025 596 461 59 592 2026 536 113 61 532 2027 466 105 17 462 2028 399 68 12 395 2029 386 66 1 382 2030 and beyond 1,392 696 306 1,373 (1) CenterPoint Energy’s undiscounted minimum payment obligations related to PPAs with commitments ranging from 15 years to 25 years and its purchase commitments under its BTA in Posey County, Indiana at the original contracted amount. (2) The undiscounted payment obligations relate primarily to technology hardware and software agreements. Excluded from the table above are estimates for cash outlays from other PPAs through Indiana Electric that do not have minimum thresholds but do require payment when energy is generated by the provider. Costs arising from certain of these commitments are pass-through costs, generally collected dollar-for-dollar from retail customers through regulator-approved cost recovery mechanisms. (b) Guarantees and Product Warranties (CenterPoint Energy) On May 21, 2023, CenterPoint Energy, through Vectren Energy Services, entered into the Equity Purchase Agreement to sell Energy Systems Group. The sale closed on June 30, 2023. See Note 3 for further information. In the normal course of business prior to the consummation of the transaction on June 30, 2023, CenterPoint Energy, primarily through Vectren, issued parent company level guarantees supporting Energy Systems Group ’s obligations. When Energy Systems Group was wholly owned by CenterPoint Energy, these guarantees did not represent incremental consolidated obligations, but rather, these guarantees represented guarantees of Energy Systems Group’s obligations to allow it to conduct business without posting other forms of assurance. For those obligations where potential exposure can be estimated, management estimates the maximum exposure under these guarantees to be approximately $489 million as of March 31, 2024 and expects the exposure to decrease pro rata. This exposure primarily relates to energy savings guarantees on federal energy savings performance contracts. Other parent company level guarantees, certain of which do not contain a cap on potential liability, were issued prior to the sale of Energy Systems Group in support of federal operations and maintenance projects for which a maximum exposure cannot be estimated based on the nature of the projects. Under the terms of the Equity Purchase Agreement, ESG Holdings Group must generally use reasonable best efforts to replace existing CenterPoint Energy guarantees with credit support provided by a party other than CenterPoint Energy as of and after the closing of the transaction. The Equity Purchase Agreement also requires certain protections to be provided for any damages incurred by CenterPoint Energy in relation to these guarantees not released by closing. No additional guarantees were provided by CenterPoint Energy in favor of Energy Systems Group subsequent to the closing of the sale on June 30, 2023. While there can be no assurance that performance under any of these parent company guarantees will not be required in the future, CenterPoint Energy considers the likelihood of a material amount being incurred as remote. CenterPoint Energy believes that, from Energy Systems Group ’s inception in 1994 to the closing of the sale of Energy Systems Group on June 30, 2023, Energy Systems Group had a history of generally meeting its performance obligations and energy savings guarantees and its installed products operated effectively. CenterPoint Energy recorded no amounts on its Condensed Consolidated Balance Sheets as of March 31, 2024 and December 31, 2023 related to its obligation under the outstanding guarantees. (c) Legal, Environmental and Other Matters Legal Matters Litigation Related to the February 2021 Winter Storm Event. Various legal proceedings are still pending against numerous entities with respect to the February 2021 Winter Storm Event, including against CenterPoint Energy, Utility Holding, Houston Electric, and CERC. Like other Texas energy companies and TDUs, CenterPoint Energy and Houston Electric have become involved in certain investigations, litigation and other regulatory and legal proceedings regarding their efforts to restore power during the storm and their compliance with NERC, ERCOT and PUCT rules and directives. Additionally, like other natural gas market participants, CERC has been named in litigation alleging gas market manipulation. CenterPoint Energy, Utility Holding, and Houston Electric, along with hundreds of other defendants (including ERCOT, power generation companies, other TDUs, natural gas producers, REPs, and other entities) have received claims and lawsuits filed by plaintiffs alleging wrongful death, personal injury, property damage and other injuries and damages. As of March 31, 2024, there are approximately 220 pending lawsuits that are consolidated in Texas state court in Harris County, Texas, as part of the MDL proceeding related to the February 2021 Winter Storm Event, and CenterPoint Energy and Houston Electric, along with numerous other entities, have been named as defendants in approximately 155 of those lawsuits. One of the lawsuits in the MDL is a putative class action on behalf of everyone who received electric power via ERCOT grid and sustained a power outage between February 10, 2021 and February 28, 2021. Additionally, Utility Holding is currently named as a defendant in one lawsuit in which CenterPoint Energy and Houston Electric are also named as defendants. The judge overseeing the MDL issued an initial case management order and stayed all proceedings and discovery. Per the case management order, the judge entertained dispositive motions in five representative or “bellwether” cases and, in late January 2023, issued rulings on them. In a subsequent opinion in an unrelated matter, the Texas Supreme Court held that ERCOT is entitled to sovereign immunity. This ruling will apply to claims against ERCOT in the MDL. The MDL judge also dismissed all claims against the natural gas defendants (which list of natural gas defendants incorrectly included Utility Holding) and the REP defendants and some causes of action against the other defendants. CenterPoint Energy expects that the claims against Utility Holding will ultimately be dismissed in light of the judge’s initial rulings. As to the TDU and generator defendants, the judge dismissed some causes of action but denied the motions to dismiss claims for negligence, gross negligence, and nuisance, which denial the TDU defendants and generator defendants asked the courts of appeals to overturn. On April 2, 2024, a three-judge panel of the Court of Appeals for the Fourteenth District of Texas issued an opinion in the TDU mandamus proceeding, granting in part and denying in part the TDUs’ mandamus request. In its opinion, the panel granted the TDUs’ mandamus request relating to the TDUs’ motion to dismiss the plaintiffs’ claims for negligence and negligent and strict liability nuisance and ordered those claims be dismissed. The panel denied the TDUs’ mandamus request relating to the TDUs’ motion to dismiss the plaintiffs’ gross negligence/intentional misconduct and intentional nuisance claims. The TDUs plan to file a mandamus petition to the Supreme Court of Texas, seeking dismissal of the remaining claims. In the generator mandamus proceeding pending in the Court of Appeals for the First District of Texas, the plaintiffs have asked the entire First Court of Appeals to rehear the panel’s decision granting the generators’ mandamus request. The MDL judge is allowing defendants (including Houston Electric) to file several additional motions on preliminary legal issues, and otherwise the cases remain stayed. CenterPoint Energy, Utility Holding, and Houston Electric intend to vigorously defend themselves against the claims raised. CenterPoint Energy and Houston Electric have also responded to inquiries from the Texas Attorney General and the Galveston County District Attorney’s Office, and various other regulatory and governmental entities also conducted inquiries, investigations and other reviews of the February 2021 Winter Storm Event and the efforts made by various entities to prepare for, and respond to, the event, including the electric generation shortfall issues. In February 2023, twelve lawsuits were filed in state district court in Harris County and Tom Green County, Texas, against dozens of gas market participants in Texas, including natural gas producers, processors, pipelines, marketers, sellers, traders, gas utilities, and financial institutions. Plaintiffs named CERC as a defendant, along with “CenterPoint Energy Services, Inc.,” incorrectly identifying it as CERC’s parent company (CenterPoint Energy previously divested CES). One lawsuit filed in Harris County is a putative class action on behalf of two classes of electric and natural gas customers (those who experienced a loss of electricity and/or natural gas, and those who were charged securitization-related surcharges on a utility bill or were otherwise charged higher rates for electricity and/or gas during the February 2021 Winter Storm Event), potentially including millions of class members. Two other lawsuits (one filed in Harris County and one in Tom Green County) are brought by an entity that purports to be an assignee of claims by tens of thousands of persons and entities that have assigned claims to the plaintiff. These, and nine other similar lawsuits filed in Harris County, generally allege that the defendants engaged in gas market manipulation and price gouging, including by intentionally withholding, suppressing, or diverting supplies of natural gas in connection with the February 2021 Winter Storm Event, Winter Storm Elliott, and other severe weather conditions, and through financial market manipulation. Plaintiffs allege that this manipulation impacted gas supply and prices as well as the market, supply, and price of electricity in Texas and caused blackouts and other damage. Plaintiffs assert claims for tortious interference with existing contract, private nuisance, and unjust enrichment, and allege a broad array of injuries and damages, including personal injury, property damage, and harm from certain costs being securitized and passed on to ratepayers. The lawsuits do not specify the amount of damages sought, but seek broad categories of actual, compensatory, statutory, consequential economic, and punitive damages; restitution and disgorgement; pre- and post-judgment interest; costs and attorneys’ fees; and other relief. As of March 31, 2024, most of the lawsuits have not been served, but the three cases in which defendants were served were tagged for transfer to the existing MDL proceeding referenced above. On February 2, 2024, CERC filed pleas to the jurisdiction in the three cases in which it was served; CERC also partially joined the defendants’ motions to dismiss and additional pleas to the jurisdiction. On April 2, 2024, plaintiffs in the three served cases filed amended petitions rather than responding to pleas to the jurisdiction, and motions to dismiss. Among other changes, plaintiffs in these three cases dismissed CenterPoint Energy Services, but maintained the same three causes of action as to the remaining defendants. CERC intends to vigorously defend itself against the claims raised, including by renewing jurisdictional challenges to the plaintiffs’ claims. The nine other similar lawsuits filed in Harris County have also been tagged for transfer to the MDL proceeding, but the defendants, including CERC, have not been served. These gas market cases are in addition to the 220 cases noted above regarding electric market issues. To date, there have not been demands, quantification, disclosure or discovery of damages by any party to any of the above legal matters that are sufficient to enable CenterPoint Energy and its subsidiaries to estimate exposure. Given that, as well as the preliminary nature of the proceedings, the numerosity of parties and complexity of issues involved, and the uncertainties of litigation, CenterPoint Energy and its subsidiaries are unable to predict the outcome or consequences of any of the foregoing matters or to estimate a range of potential losses. CenterPoint Energy and its subsidiaries have general and excess liability insurance policies that provide coverage for third party bodily injury and property damage claims. As CenterPoint Energy previously noted, given the nature of certain of the plaintiffs’ allegations, insurance coverage may not be available other than for third party bodily injury and property damage claims caused by an accident, and one of CenterPoint Energy’s insurers recently denied coverage for intentional injury as alleged by plaintiffs in the gas market cases. CenterPoint Energy and its subsidiaries intend to continue to pursue any and all available insurance coverage for all of these matters. Jefferson Parish . Several parishes and the State of Louisiana filed 42 suits under Louisiana’s State and Local Coastal Resources Management Act (SLCRMA) against hundreds of oil and gas companies seeking compensatory damages for contamination and erosion of the Louisiana coastline allegedly caused by historical oil and gas operations. One of the defendants in one of the lawsuits (filed in 2013 only by the Parish of Jefferson) is Primary Fuels, Inc., a predecessor company of CenterPoint Energy, which operated in Louisiana from 1983-1989. All 42 suits were removed to Louisiana federal courts twice and were stayed for several years pending the district courts’ consideration of various motions to remand and multiple appeals of remand orders. Recently, several cases involving other parishes that had been remanded to Louisiana state court have begun to resume proceedings in state court. However, as of March 31, 2024, the federal district court had not ruled on Jefferson Parish’s motion to remand to state court the lawsuit which includes Primary Fuels, Inc. among the defendants. Because of the procedurally preliminary nature of the proceedings, lack of information about both the scope of and damages for Jefferson Parish’s claim against Primary Fuels, Inc., the numerosity of parties and complexity of issues involved, and the uncertainties of litigation, CenterPoint Energy and its subsidiaries are unable to predict the outcome or consequences of this matter or to estimate a range of potential losses. CenterPoint Energy will continue to vigorously defend itself against the claims raised and pursue any and all available insurance coverage. Environmental Matters MGP Sites. CenterPoint Energy, CERC and their predecessors, including predecessors of Vectren, operated MGPs in the past. The costs CenterPoint Energy or CERC, as applicable, expect to incur to fulfill their respective obligations are estimated by management using assumptions based on actual costs incurred, the timing of expected future payments and inflation factors, among others. While CenterPoint Energy and CERC have recorded obligations for all costs which are probable and estimable, including amounts they are presently obligated to incur in connection with activities at these sites, it is possible that future events may require remedial activities which are not presently foreseen, and those costs may not be subject to PRP or insurance recovery. (i) Minnesota MGPs (CenterPoint Energy and CERC) . With respect to certain Minnesota MGP sites, CenterPoint Energy and CERC have completed state-ordered remediation and continue state-ordered monitoring and water treatment. CenterPoint Energy and CERC recorded a liability as reflected in the table below for continued monitoring and any future remediation required by regulators in Minnesota. (ii) Indiana MGPs (CenterPoint Energy and CERC) . In the Indiana Gas service territory, the existence, location and certain general characteristics of 26 gas manufacturing and storage sites have been identified for which CenterPoint Energy and CERC may have some remedial responsibility. A remedial investigation/feasibility study was completed at one of the sites under an agreed upon order between Indiana Gas and the IDEM, and a Record of Decision was issued by the IDEM in January 2000. The remaining sites have been submitted to the IDEM’s VRP. CenterPoint Energy has also identified its involvement in five manufactured gas plant sites in SIGECO’s service territory, all of which are currently enrolled in the IDEM’s VRP. CenterPoint Energy is currently conducting some level of remedial activities, including groundwater monitoring at certain sites. (iii) Other MGPs (CenterPoint Energy and CERC). In addition to the Minnesota and Indiana sites, the EPA and other regulators have investigated MGP sites that were owned or operated by CenterPoint Energy or CERC or may have been owned by one of their former affiliates. Total costs that may be incurred in connection with addressing these sites cannot be determined at this time. The estimated accrued costs are limited to CenterPoint Energy’s and CERC’s share of the remediation efforts and are therefore net of exposures of other PRPs. The estimated range of possible remediation costs for the sites for which CenterPoint Energy and CERC believe they may have responsibility was based on remediation continuing for the minimum time frame given in the table below: March 31, 2024 CenterPoint Energy CERC (in millions, except years) Amount accrued for remediation $ 13 $ 11 Minimum estimated remediation costs 8 7 Maximum estimated remediation costs 47 40 Minimum years of remediation 5 5 Maximum years of remediation 50 50 The cost estimates are based on studies of a site or industry average costs for remediation of sites of similar size. The actual remediation costs will depend on the number of sites to be remediated, the participation of other PRPs, if any, and the remediation methods used. CenterPoint Energy and CERC do not expect the ultimate outcome of these matters to have a material adverse effect on the financial condition, results of operations or cash flows of either CenterPoint Energy or CERC. Asbestos. Some facilities owned by the Registrants or their predecessors contain or have contained asbestos insulation and other asbestos-containing materials. The Registrants are from time to time named, along with numerous others, as defendants in lawsuits filed by a number of individuals who claim injury due to exposure to asbestos, and the Registrants anticipate that additional claims may be asserted in the future. Although their ultimate outcome cannot be predicted at this time, the Registrants do not expect these matters, either individually or in the aggregate, to have a material adverse effect on their financial condition, results of operations or cash flows. CCR Rule (CenterPoint Energy). In April 2015, the EPA finalized its CCR Rule, which regulates ash as non-hazardous material under the RCRA. The final rule allows beneficial reuse of ash, and the majority of the ash generated by Indiana Electric’s generating plants will continue to be reused. In July 2018, the EPA released its final CCR Rule Phase I Reconsideration which extended the deadline to October 31, 2020 for ceasing placement of ash in ponds that exceed groundwater protections standards or that fail to meet location restrictions. In August 2019, the EPA proposed additional “Part A” amendments to its CCR Rule with respect to beneficial reuse of ash and other materials. The Part A amendments were finalized in August 2020 and extended the deadline to cease placement of ash in ponds to April 11, 2021, discussed further below. The Part A amendments do not restrict Indiana Electric’s current beneficial reuse of its fly ash. Indiana Electric has three ash ponds, two at the F.B. Culley facility (Culley East and Culley West) and one at the A.B. Brown facility. Under the existing CCR Rule, Indiana Electric is required to perform integrity assessments, including ground water monitoring, at its F.B. Culley and A.B. Brown generating stations. The ground water studies were necessary to determine the remaining service life of the ponds and whether a pond must be retrofitted with liners or closed in place. Groundwater monitoring indicates potential groundwater impacts very close to Indiana Electric’s ash impoundments, and further analysis is ongoing. The CCR Rule required companies to complete location restriction determinations by October 18, 2018. Indiana Electric completed its evaluation and determined that one F.B. Culley pond (Culley East) and the A.B. Brown pond fail the aquifer placement location restriction. As a result of this failure, Indiana Electric was required to cease disposal of new ash in the ponds and commence closure of the ponds by April 11, 2021, unless approved for an extension. CenterPoint Energy filed timely extension requests available under the CCR Rule that would allow Indiana Electric to continue to use the ponds through October 15, 2023. On October 5, 2022, the EPA issued a proposed conditional approval of the Part A extension request for the A.B. Brown pond. Both the Culley East and A.B. Brown facilities have been taken out of service in a timely manner per the commitments made to the EPA in the extension requests filed for both ponds. On April 24, 2019, Indiana Electric received an order from the IURC approving recovery in rates of costs associated with the closure of the Culley West pond, which has already completed closure activities. On August 14, 2019, Indiana Electric filed its petition with the IURC for recovery of costs associated with the closure of the A.B. Brown ash pond, which would include costs associated with the excavation and recycling of ponded ash. This petition was subsequently approved by the IURC on May 13, 2020. On October 28, 2020, the IURC approved Indiana Electric’s ECA proceeding, which included the initiation of recovery of the federally mandated project costs. In July 2018, Indiana Electric filed a Complaint for Damages and Declaratory Relief against its insurers seeking reimbursement of defense, investigation and pond closure costs incurred to comply with the CCR Rule, and has since reached confidential settlement agreements with its insurers. The proceeds of these settlements will offset costs that have been and will be incurred to close the ponds. On November 1, 2022, Indiana Electric filed for a CPCN to recover federally mandated costs associated with closure of the Culley East Pond, its third and final ash pond. Indiana Electric sought accounting and ratemaking relief for the project, and on June 8, 2023, Indiana Electric filed a revised CPCN for recovery of the federally mandated ash pond costs. On February 7, 2024 the IURC approved the federally mandated costs, both incurred and projected, of $52 million in capital costs, plus an estimated $133 thousand in annual operation and maintenance expenses, for recovery through the ECA. As of March 31, 2024, CenterPoint Energy has recorded an approximate $117 million ARO, which represents the discounted value of future cash flow estimates to close the ponds at A.B. Brown and F.B. Culley. This estimate is subject to change due to the contractual arrangements; continued assessments of the ash, closure methods, and the timing of closure; implications of Indiana Electric’s generation transition plan; changing environmental regulations; and proceeds received from the settlements in the aforementioned insurance proceeding. In addition to these AROs, Indiana Electric also anticipates equipment purchases of between $60 million and $80 million to complete the A.B. Brown closure project. On May 18, 2023, the EPA issued a proposed revision to the CCR Rule that could potentially expand the scope of units regulated under the federal CCR Rule (CCR Legacy Rule). The CCR Legacy Rule seeks to include legacy CCR surface impoundments (inactive surface impoundments at inactive generating facilities) as well as new “CCR management units” at active or inactive facilities otherwise subject to federal CCR regulations. On April 25, 2024, the EPA released its final Hazardous and Solid Waste Management System; Disposal of Coal Combustion Residuals from Electric Utilities; Legacy CCR Surface Impoundments rule. CenterPoint Energy is currently evaluating the effects of the rule and expects that the rule will require CenterPoint Energy to conduct additional CCR investigations. Clean Water Act Permitting of Groundwater and Power Plant Discharges . In April 2020, the U.S. Supreme Court issued an opinion providing that indirect discharges via groundwater or other non-point sources are subject to permitting and liability under the Clean Water Act when they are the functional equivalent of a direct discharge. On November 27, 2023, the EPA published draft guidance regarding the application of the “functional equivalent” analysis as related to permitting of certain discharges through groundwater to surface waters. The Registrants are evaluating the extent to which this decision and the proposed EPA guidance will affect Clean Water Act permitting requirements and/or liability for their operations. In 2015, the EPA finalized revisions to the existing steam electric wastewater discharge standards which set more stringent wastewater discharge limits and effectively prohibited further wet disposal of coal ash in ash ponds. In February 2019, the IURC approved Indiana Electric’s Effluent Limitation Guidelines Compliance Plan for its F.B. Culley Generating Station, which was completed in compliance with the requirements of the Effluent Limitation Guidelines. On April 25, 2024, the EPA released its final Supplemental Effluent Limitation Guidelines and Standards for the Steam Electric Generating Point Source Category. CenterPoint Energy is currently evaluating the effects of this rule. Other Environmental. From time to time, the Registrants identify the presence of environmental contaminants during operations or on property where their predecessors have conducted operations. Other such sites involving contaminants may be identified in the future. The Registrants have and expect to continue to remediate any identified sites consistent with state and federal legal obligations. From time to time, the Registrants have received notices, and may receive notices in the future, from regulatory authorities or others regarding status as a PRP in connection with sites found to require remediation due to the presence of environmental contaminants. In addition, the Registrants have been, or may be, named from time to time as defendants in litigation related to such sites. Although the ultimate outcome of such matters cannot be predicted at this time, the Registrants do not expect these matters, either individually or in the aggregate, to have a material adverse effect on their financial condition, results of operations or cash flows. Other Proceedings The Registrants are involved in other legal, environmental, tax and regulatory proceedings before various courts, regulatory commissions and governmental agencies regarding matters arising in the ordinary course of business. From time to time, the Registrants are also defendants in legal proceedings with respect to claims brought by various plaintiffs against broad groups of participants in the energy industry. Some of these proceedings involve substantial amounts. The Registrants regularly analyze current information and, as necessary, provide accruals for probable and reasonably estimable liabilities on the eventual disposition of these matters. The Registrants do not expect the disposition of these matters to have a material adverse effect on the Registrants’ financial condition, results of operations or cash flows.

Earnings Per Share (CenterPoint

Earnings Per Share (CenterPoint Energy)	3 Months Ended
Earnings Per Share (CenterPoint Energy)	Mar. 31, 2024
Earnings Per Share [Abstract]
Earnings Per Share (CenterPoint Energy)	Earnings Per Share (CenterPoint Energy) Basic earnings per common share is computed by dividing income available to common shareholders by the weighted average number of common shares outstanding during the period. Participating securities are excluded from weighted average number of common shares outstanding in the computation of basic earnings per common share. Diluted earnings per common share is computed by dividing income available to common shareholders by the weighted average number of common shares outstanding, including all potentially dilutive common shares, if the effect of such common shares is dilutive. Diluted earnings per common share reflects the dilutive effect of potential common shares from share-based awards. The dilutive effect of restricted stock is computed using the if-converted method, which assumes conversion of the restricted stock at the beginning of the period. The dilutive effect of restricted stock is computed using the treasury stock method, as applicable, which includes the incremental shares that would be hypothetically vested in excess of the number of shares assumed to be hypothetically repurchased with the assumed proceeds. Diluted earnings per common share will also reflect the dilutive effect of potential common shares from the conversion of the Convertible Notes. Convertible debt in which the principal amount must be settled in cash is excluded from the calculation of diluted earnings per common share. There would be no interest expense adjustment to the numerator for the cash-settled portion of the Convertible Notes because that portion will always be settled in cash. The conversion spread value in shares will be included in diluted earnings per common share using the if-converted method if the convertible debt is in the money. The denominator of diluted earnings per common share is determined by dividing the conversion spread value of the share-settled portion of the Convertible Notes as of the reporting date by the average share price over the reporting period. For the three months ended March 31, 2024, the convertible debt was not in the money; therefore, no incremental shares were assumed converted or included in the diluted earnings per share calculation below. For further details about the Convertible Notes, see Note 11 . The following table reconciles numerators and denominators of CenterPoint Energy’s basic and diluted earnings per common share. Three Months Ended March 31, 2024 2023 (in millions, except per share and share amounts) Numerator: Net income $ 350 $ 325 Less: Preferred stock dividend requirement (Note 18) — 12 Income available to common shareholders - basic and diluted $ 350 $ 313 Denominator: Weighted average common shares outstanding - basic 632,228,000 630,309,000 Plus: Incremental shares from assumed conversions: Restricted stock 1,742,000 2,742,000 Weighted average common shares outstanding - diluted 633,970,000 633,051,000 Earnings Per Common Share: Basic Earnings Per Common Share $ 0.55 $ 0.50 Diluted Earnings Per Common Share $ 0.55 $ 0.49

Reportable Segments

Reportable Segments	3 Months Ended
Reportable Segments	Mar. 31, 2024
Segment Reporting [Abstract]
Reportable Segments	Reportable Segments The Registrants’ determination of reportable segments considers the strategic operating units under which its CODM manages sales, allocates resources and assesses performance of various products and services to wholesale or retail customers in differing regulatory environments. Each Registrant’s CODM views net income as the measure of profit or loss for the reportable segments. As of March 31, 2024, reportable segments by Registrant were as follows: CenterPoint Energy • CenterPoint Energy’s Electric reportable segment consists of electric transmission and distribution services in the Texas gulf coast area in the ERCOT region and electric transmission and distribution services primarily to southwestern Indiana and includes power generation and wholesale power operations in the MISO region. • CenterPoint Energy’s Natural Gas reportable segment consists of (i) intrastate natural gas sales to, and natural gas transportation and distribution for residential, commercial, industrial and institutional customers in Indiana, Louisiana, Minnesota, Mississippi, Ohio and Texas; and (ii) permanent pipeline connections through interconnects with various interstate and intrastate pipeline companies through CEIP. • CenterPoint Energy’s Corporate and Other category consists of energy performance contracting and sustainable infrastructure services through Energy Systems Group through June 30, 2023, the date of the sale of Energy Systems Group, and corporate operations which support all of the business operations of CenterPoint Energy. CenterPoint Energy’s Corporate and Other also includes office buildings and other real estate used for business operations. Houston Electric • Houston Electric’s single reportable segment consists of electric transmission services to transmission service customers in the ERCOT region and distribution services to REPs serving the Texas gulf coast area that includes the city of Houston. CERC • CERC’s single reportable segment following the Restructuring consisted of (i) intrastate natural gas sales to, and natural gas transportation and distribution for, residential, commercial, industrial and institutional customers in Indiana, Louisiana, Minnesota, Mississippi, Ohio and Texas; and (ii) permanent pipeline connections through interconnects with various interstate and intrastate pipeline companies through CEIP. Financial data for reportable segments is as follows: CenterPoint Energy Three Months Ended March 31, 2024 2023 Revenues from Net Income (Loss) Revenues from Net Income (in millions) Electric $ 1,049 (1) $ 121 $ 952 (1) $ 123 Natural Gas 1,570 283 1,775 234 Corporate and Other 1 (54) 52 (32) Consolidated $ 2,620 $ 350 $ 2,779 $ 325 Total Assets March 31, 2024 December 31, 2023 (in millions) Electric $ 21,688 $ 21,089 Natural Gas 17,611 17,429 Corporate and Other, net of eliminations (1) 900 1,197 Consolidated $ 40,199 $ 39,715 (1) Total assets included pension and other postemployment-related regulatory assets of $379 million and $385 million as of March 31, 2024 and December 31, 2023, respectively. Houston Electric Houston Electric consists of a single reportable segment; therefore, a tabular reportable segment presentation has not been included. CERC CERC consists of a single reportable segment; therefore, a tabular reportable segment presentation has not been included.

Supplemental Disclosure of Cash

Supplemental Disclosure of Cash Flow Information	3 Months Ended
Supplemental Disclosure of Cash Flow Information	Mar. 31, 2024
Supplemental Cash Flow Elements [Abstract]
Supplemental Disclosure of Cash Flow Information	Supplemental Disclosure of Cash Flow and Balance Sheet Information Supplemental Disclosure of Cash Flow Information The table below provides supplemental disclosure of cash flow information: Three Months Ended March 31, 2024 2023 CenterPoint Energy Houston Electric CERC CenterPoint Energy Houston Electric CERC (in millions) Cash Payments/Receipts: Interest, net of capitalized interest $ 228 $ 59 $ 76 $ 191 $ 78 $ 58 Income tax refunds, net (12) — — (1) — — Non-cash transactions: Accounts payable related to capital expenditures 195 149 59 270 178 85 ROU assets obtained in exchange for lease liabilities (1) — — — 1 1 — (1) Excludes ROU assets obtained through prepayment of the lease liabilities. See Note 19. The table below provides a reconciliation of cash, cash equivalents and restricted cash reported in the Condensed Consolidated Balance Sheets to the amount reported in the Condensed Statements of Consolidated Cash Flows: March 31, 2024 December 31, 2023 CenterPoint Energy Houston Electric CERC CenterPoint Energy Houston Electric CERC (in millions) Cash and cash equivalents (1) $ 161 $ 109 $ 17 $ 90 $ 76 $ 1 Restricted cash included in Prepaid expenses and other current assets (2) 18 13 — 19 13 — Total cash, cash equivalents and restricted cash shown in Condensed Statements of Consolidated Cash Flows $ 179 $ 122 $ 17 $ 109 $ 89 $ 1 (1) Cash and cash equivalents related to VIEs as of March 31, 2024 and December 31, 2023 included $132 million and $90 million, respectively, at CenterPoint Energy and $109 million and $76 million, respectively, at Houston Electric. (2) Restricted cash primarily related to accounts established by CenterPoint Energy and Houston Electric in connection with the issuance of the Securitization Bonds to collateralize the Securitization Bonds that were issued in these financing transactions. These restricted cash accounts are not available for withdrawal until the maturity of the Securitization Bonds. Supplemental Disclosure of Balance Sheet Information Included in other current liabilities on CERC’s Consolidated Balance Sheets as of March 31, 2024 and December 31, 2023 was $65 million and $118 million, respectively, of credits related to customers on budget billing programs. Included in other current liabilities on Houston Electric’s Consolidated Balance Sheets as of March 31, 2024 and December 31, 2023 was $50 million and $47 million, respectively, of accrued contributions in aid of construction.

Related Party Transactions (Hou

Related Party Transactions (Houston Electric and CERC)	3 Months Ended
Related Party Transactions (Houston Electric and CERC)	Mar. 31, 2024
Related Party Transactions [Abstract]
Related Party Transactions (Houston Electric and CERC)	Related Party Transactions (Houston Electric and CERC) Houston Electric and CERC participate in CenterPoint Energy’s money pool through which they can borrow or invest on a short-term basis. Funding needs are aggregated and external borrowing or investing is based on the net cash position. The net funding requirements of the CenterPoint Energy money pool are expected to be met with borrowings under CenterPoint Energy’s revolving credit facility or the sale of CenterPoint Energy’s commercial paper. The table below summarizes CenterPoint Energy money pool activity: March 31, 2024 December 31, 2023 Houston Electric CERC Houston Electric CERC (in millions, except interest rates) Money pool investments (borrowings) (1) $ 573 $ — $ 238 $ 1 Weighted average interest rate 5.55 % — % 5.59 % 5.59 % (1) Included in Accounts and notes receivable (payable)–affiliated companies on Houston Electric’s and CERC’s respective Condensed Consolidated Balance Sheets, as applicable. CenterPoint Energy provides some corporate services to Houston Electric and CERC. The costs of services have been charged directly to Houston Electric and CERC using methods that management believes are reasonable. These methods include usage rates, dedicated asset assignment and proportionate corporate formulas based on operating expenses, assets, gross margin, employees and a composite of assets, gross margin and employees. Houston Electric provides certain services to CERC. These services are billed at actual cost, either directly or as an allocation and include fleet services, shop services, geographic services, surveying and right-of-way services, radio communications, data circuit management and field operations. Additionally, CERC provides certain services to Houston Electric. These services are billed at actual cost, either directly or as an allocation and include line locating and other miscellaneous services. These charges are not necessarily indicative of what would have been incurred had Houston Electric and CERC not been affiliates. Amounts charged for these services were as follows and are included primarily in Operation and maintenance expenses on the Condensed Statements of Consolidated Income: Three Months Ended March 31, 2024 2023 Houston Electric CERC Houston Electric CERC (in millions) Corporate service charges $ 35 $ 51 $ 35 $ 50 Net affiliate service charges (billings) (1) 1 (3) 3 The table below presents transactions among Houston Electric, CERC and their parent, Utility Holding: Three Months Ended March 31, 2024 2023 Houston Electric CERC Houston Electric CERC (in millions) Cash dividends paid to parent $ 36 $ 115 $ 51 $ 204 Cash contribution from parent 230 — 650 —

Equity

Equity	3 Months Ended
Equity	Mar. 31, 2024
Equity [Abstract]
Equity	Equity Dividends Declared and Paid (CenterPoint Energy) CenterPoint Energy declared and paid dividends on its Common Stock as follows during the periods indicated below: Dividends Declared Per Share Dividends Paid Per Share Three Months Ended March 31, Three Months Ended March 31, 2024 2023 2024 2023 Common Stock $ — $ — $ 0.200 $ 0.190 Series A Preferred Stock (1) — — — 30.625 (1) All of the outstanding shares of Series A Preferred Stock were redeemed during September 2023 as further described below. Equity Distribution Agreement (CenterPoint Energy) On January 10, 2024, CenterPoint Energy entered into an Equity Distribution Agreement with certain financial institutions with respect to the offering and sale from time to time of shares of Common Stock, having an aggregate gross sales price of up to $500 million. Sales of Common Stock may be made by any method permitted by applicable law and deemed to be an “at the market offering” as defined in Rule 415 of the Securities Act of 1933, as amended. CenterPoint Energy may also enter into one or more forward sales agreements pursuant to master forward confirmations. The offer and sale of Common Stock under the Equity Distribution Agreement will terminate upon the earliest of (1) the sale of all Common Stock subject to the Equity Distribution Agreement, (2) termination of the Equity Distribution Agreement, or (3) May 17, 2026. During the quarter ended March 31, 2024, CenterPoint Energy issued 133,405 shares of Common Stock through the ATM Managers under the Equity Distribution Agreement, representing aggregate cash proceeds of $3 million, which is net of compensation paid by CenterPoint Energy to the ATM Managers of less than $1 million. As of March 31, 2024, CenterPoint Energy had not entered into any forward sale agreements under the program. Additionally, as of March 31, 2024, CenterPoint Energy had $496 million of capacity available under the program. For information regarding issuances under the program subsequent to March 31, 2024, see Note 20. Income Allocated to Series A Preferred Shareholders (CenterPoint Energy) Three Months Ended March 31, 2024 2023 (in millions) Series A Preferred Stock (1) $ — $ 12 Total income allocated to preferred shareholders $ — $ 12 (1) All of the outstanding shares of Series A Preferred Stock were redeemed during September 2023 as further described below. Series A Preferred Stock Redemption (CenterPoint Energy) On September 1, 2023, CenterPoint Energy redeemed 800,000 shares of CenterPoint Energy’s Series A Preferred Stock, in whole for cash at a redemption price of $1,000 per share, plus any accumulated and unpaid dividends thereon to, but excluding, the redemption date. Accumulated Other Comprehensive Income (Loss) Changes in accumulated comprehensive income (loss) are as follows: Three Months Ended March 31, 2024 2023 CenterPoint Energy CERC CenterPoint Energy CERC (in millions) Beginning Balance $ (35) $ 16 $ (31) $ 16 Other comprehensive income (loss) before reclassifications: Remeasurement of pension and other postretirement plans (2) — — — Net deferred gain from cash flow hedges 3 — — — Prior service cost (1) — — (1) (1) Actuarial losses (1) 1 (1) — — Other comprehensive income (loss) 2 (1) (1) (1) Ending Balance $ (33) $ 15 $ (32) $ 15 (1) Amounts are included in the computation of net periodic cost and are reflected in Other income, net in each of the Registrants’ respective Condensed Statements of Consolidated Income.

Leases

Leases	3 Months Ended
Leases	Mar. 31, 2024
Leases [Abstract]
Leases	Leases In 2021, Houston Electric entered into a temporary short-term lease and long-term leases for mobile generation. The short-term lease agreement allowed Houston Electric to take delivery of TEEEF assets on a short-term basis with an initial term ending on September 30, 2022 and extended until December 31, 2022. At such time, the short-term lease agreement expired and all mobile generation assets were leased under the long-term lease agreement. Per Houston Electric’s short-term lease accounting policy election, a ROU asset and lease liability are not reflected on Houston Electric’s Condensed Consolidated Balance Sheets. Expenses associated with the short-term lease, including carrying costs, are deferred to a regulatory asset and totaled, net of amounts recovered in rates, $98 million and $100 million as of March 31, 2024 and December 31, 2023, respectively. The long-term lease agreement includes up to 505 MW of TEEEF, all of which was delivered as of December 31, 2022, triggering lease commencement at delivery, with an initial term ending in 2029 for all TEEEF leases. These assets were previously available under the short-term lease agreement. Houston Electric derecognized the finance lease liability when the extinguishment criteria in Topic 405 - Liabilities was achieved. Per the terms of the agreement, lease payments are due and made in full by Houston Electric upon taking possession of the asset, relieving substantially all of the associated finance lease liability at that time. The remaining finance lease liability associated with the commenced long-term TEEEF agreement was not significant as of March 31, 2024 and December 31, 2023 and relates to removal costs that will be incurred at the end of the lease term. As of March 31, 2024, Houston Electric has secured a first lien on the assets leased under the prepayment agreement, except for assets with lease payments totaling $92 million. The $92 million prepayment is being held in an escrow account, not controlled by Houston Electric, and the funds will be released when a first lien can be secured for Houston Electric. Expenses associated with the long-term lease, including depreciation expense on the right of use asset and carrying costs, are deferred to a regulatory asset and totaled, net of amounts recovered in rates, $131 million and $124 million as of March 31, 2024 and December 31, 2023, respectively. The long-term lease agreement contains a termination clause that can be exercised in the event of material adverse regulatory actions. If the right to terminate is elected, subject to the satisfaction of certain conditions, 75% of Houston Electric’s prepaid lease costs that are attributable to the period from the effective date of termination to the end of the lease term would be refunded. In December 2022, the long-term lease agreement was amended to include a disallowance reimbursement clause that can be exercised in the event that any regulatory proceeding or settlement agreement results in a disallowance of Houston Electric’s recovery of deferred costs under either the long-term lease agreement, short-term lease agreement or any other quantifiable adverse financial impact to Houston Electric. The disallowance reimbursement clause expired on December 31, 2023 and Houston Electric can no longer seek relief in the event of an unfavorable regulatory ruling. For further discussion of the regulatory impacts, see Note 6. Houston Electric will also incur variable costs throughout the lease term for the operation and maintenance of the generators. Lease costs, including variable and ROU asset amortization costs, are deferred to Regulatory assets as incurred as a recoverable cost under the 2021 Texas legislation. See Note 6 for further information regarding recovery of these deferred costs. The components of lease cost, included in Operation and maintenance expense on the Registrants’ respective Condensed Statements of Consolidated Income, are as follows: Three Months Ended March 31, 2024 2023 CenterPoint Energy Houston CERC CenterPoint Energy Houston CERC (in millions) Operating lease cost $ 1 $ 1 $ — $ 2 $ 1 $ — Short-term lease cost 2 2 — — (1) — Total lease cost (1) $ 3 $ 3 $ — $ 2 $ — $ — (1) CenterPoint Energy and Houston Electric defer finance lease costs for TEEEF to Regulatory assets for recovery rather than to Depreciation and Amortization in the Condensed Statements of Consolidated Income. The components of lease income were as follows: Three Months Ended March 31, 2024 2023 CenterPoint Energy Houston CERC CenterPoint Energy Houston CERC (in millions) Operating lease income $ 2 $ — $ 1 $ 2 $ — $ 1 Total lease income $ 2 $ — $ 1 $ 2 $ — $ 1 Supplemental balance sheet information related to leases was as follows: March 31, 2024 December 31, 2023 CenterPoint Energy Houston CERC CenterPoint Energy Houston CERC (in millions, except lease term and discount rate) Assets: Operating ROU assets (1) $ 12 $ 5 $ 4 $ 13 $ 6 $ 4 Finance ROU assets (2) 502 502 — 526 526 — Total leased assets $ 514 $ 507 $ 4 $ 539 $ 532 $ 4 Liabilities: Current operating lease liability (3) $ 3 $ 1 $ 1 $ 3 $ 1 $ 1 Non-current operating lease liability (4) 9 4 3 10 5 3 Total leased liabilities (5) $ 12 $ 5 $ 4 $ 13 $ 6 $ 4 Weighted-average remaining lease term (in years) - operating leases 4.5 3.6 2.9 4.7 3.9 3.1 Weighted-average discount rate - operating leases 4.15 % 4.09 % 3.62 % 4.13 % 4.09 % 3.60 % Weighted-average remaining lease term (in years) - finance leases 5.3 5.3 — 5.5 5.5 — Weighted-average discount rate - finance leases 3.60 % 3.60 % — 3.60 % 3.60 % — (1) Reported within Other assets (2) Reported within Property, Plant and Equipment (3) Reported within Current other liabilities (4) Reported within Other liabilities (5) Finance lease liabilities were not significant as of March 31, 2024 or December 31, 2023 and are reported within Other long-term debt in the Registrants’ respective Condensed Consolidated Balance Sheets when applicable. As of March 31, 2024, finance lease liabilities were not significant to the Registrants. As of March 31, 2024, maturities of operating lease liabilities were as follows: CenterPoint Houston CERC (in millions) Remainder of 2024 $ 3 $ 2 $ 2 2025 3 2 1 2026 3 1 1 2027 2 1 — 2028 1 — — 2029 1 — — 2030 and beyond 1 — — Total lease payments 14 6 4 Less: Interest 2 1 — Present value of lease liabilities $ 12 $ 5 $ 4 As of March 31, 2024, future minimum finance lease payments to be received were not significant to the Registrants. As of March 31, 2024, maturities of undiscounted operating lease payments to be received are as follows: CenterPoint Houston CERC (in millions) Remainder of 2024 $ 5 $ — $ 3 2025 7 1 5 2026 7 — 5 2027 7 — 5 2028 7 — 5 2029 7 — 6 2030 and beyond 166 — 164 Total lease payments to be received $ 206 $ 1 $ 193 Other information related to leases is as follows: Three Months Ended March 31, 2024 2023 CenterPoint Houston CERC CenterPoint Houston CERC (in millions) Operating cash flows from operating leases included in the measurement of lease liabilities $ 1 $ — $ — $ 2 $ — $ — Financing cash flows from finance leases included in the measurement of lease liabilities — — — — — — See Note 16 for information on ROU assets obtained in exchange for operating lease liabilities.

Subsequent Events (CenterPoint

Subsequent Events (CenterPoint Energy)	3 Months Ended
Subsequent Events (CenterPoint Energy)	Mar. 31, 2024
Subsequent Events [Abstract]
Subsequent Events (CenterPoint Energy)	Subsequent Events (CenterPoint Energy) Equity Distribution Agreement (CenterPoint Energy) In April 2024, CenterPoint Energy issued an additional 6,525,300 shares of Common Stock through the ATM Managers under the Equity Distribution Agreement, with aggregate cash proceeds of $182 million, which is net of compensation paid by CenterPoint Energy to the ATM Managers of $2 million. As of April 30, 2024, CenterPoint Energy has $313 million of capacity available under the program. CenterPoint Energy has not entered into any forward sale agreements under the program. Dividend Declarations(CenterPoint Energy) Equity Instrument Declaration Date Record Date Payment Date Per Share Common Stock April 26, 2024 May 16, 2024 June 13, 2024 $ 0.2000

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Millions	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net income	$ 350	$ 325

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Background and Basis of Prese_2

Background and Basis of Presentation (Policies)	3 Months Ended
Background and Basis of Presentation (Policies)	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation. Included in this combined Form 10-Q are the Interim Condensed Financial Statements of CenterPoint Energy, Houston Electric and CERC, which are referred to collectively as the Registrants. The Interim Condensed Financial Statements are unaudited, omit certain financial statement disclosures and should be read with the Registrants’ financial statements included in the Registrants’ combined annual report on Form 10-K for the year ended December 31, 2023. The Combined Notes to Interim Condensed Financial Statements apply to all Registrants and specific references to Houston Electric and CERC herein also pertain to CenterPoint Energy, unless otherwise indicated. The Interim Condensed Financial Statements reflect all normal and recurring adjustments that are, in the opinion of management, necessary to present fairly the financial position, results of operations and cash flows for the respective periods. Amounts reported in the Condensed Statements of Consolidated Income are not necessarily indicative of amounts expected for a full-year period due to the effects of, among other things, (a) seasonal fluctuations in demand for energy, (b) changes in energy commodity prices, (c) timing of maintenance and other expenditures and (d) acquisitions and dispositions of businesses, assets and other interests. Background . CenterPoint Energy, Inc. is a public utility holding company. On June 30, 2023, CenterPoint Energy completed the sale of its indirect subsidiary, Energy Systems Group, to an unaffiliated third party. On February 19, 2024, CenterPoint Energy, through its subsidiary CERC Corp., entered into the LAMS Asset Purchase Agreement to sell its Louisiana and Mississippi natural gas LDC businesses. The transaction is expected to close in the first quarter of 2025. For additional information, see Note 3. The preparation of the Registrants’ financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and 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.
Principles of Consolidation	Principles of Consolidation. The accompanying Interim Condensed Financial Statements have been prepared in conformity with generally accepted accounting principles. The accounts of the Registrants and their wholly-owned and majority-owned and controlled subsidiaries are included in the Interim Condensed Financial Statements. All intercompany transactions and balances are eliminated in consolidation. As of March 31, 2024, CenterPoint Energy, Houston Electric and SIGECO had VIEs including the Bond Companies and the SIGECO Securitization Subsidiary, which are consolidated. The consolidated VIEs are wholly-owned, bankruptcy-remote, special purpose entities that were formed solely for the purpose of securitizing transition property or facilitating the securitization financing of qualified costs in the second quarter of 2023 associated with the completed retirement of SIGECO’s A.B. Brown coal generation facilities. CenterPoint Energy, through SIGECO, has a controlling financial interest in the SIGECO Securitization Subsidiary and is the VIE’s primary beneficiary. For further information, see Note 6. Creditors of CenterPoint Energy, Houston Electric and SIGECO have no recourse to any assets or revenues of the Bond Companies or the SIGECO Securitization Subsidiary, as applicable. The Securitization Bonds issued by these VIEs are payable only from and secured by transition or securitization property, as applicable, and the bondholders have no recourse to the general credit of CenterPoint Energy, Houston Electric or SIGECO.
New Accounting Pronouncements	In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (“ASU 2023-07”). This ASU updates segment disclosure requirements through enhanced disclosures around significant segment expenses. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and for interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The Registrants are currently evaluating the impact of this ASU on their respective consolidated financial statements. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures (“ASU 2023-09”). This ASU enhances the transparency of income tax disclosures related to rate reconciliation and income taxes. ASU 2023-09 is effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The Registrants are currently evaluating the impact of this ASU on their respective consolidated financial statements. Management believes that all other recently adopted and recently issued accounting standards that are not yet effective will not have a material impact on the Registrants’ financial position, results of operations or cash flows upon adoption.
Revenues from Contract with Customers	In accordance with ASC 606, Revenue from Contracts with Customers, revenue is recognized when a customer obtains control of promised goods or services. The amount of revenue recognized reflects the consideration to which the Registrants expect to be entitled to receive in exchange for these goods or services. ARPs are contracts between the utility and its regulators, not between the utility and a customer. The Registrants recognize ARP revenue as other revenues when the regulator-specified conditions for recognition have been met. Upon recovery of ARP revenue through incorporation in rates charged for utility service to customers, ARP revenue is reversed and recorded as revenue from contracts with customers. The recognition of ARP revenues and the reversal of ARP revenues upon recovery through rates charged for utility service may not occur in the same period. Revenues from Contracts with Customers Electric (CenterPoint Energy and Houston Electric). Houston Electric distributes electricity to customers over time and customers consume the electricity when delivered. Indiana Electric generates, transmits and distributes electricity to customers over time and customers consume the electricity when delivered. Revenue, consisting of both volumetric and fixed tariff rates set by state regulators, such as the PUCT and the IURC, is recognized as electricity is delivered and represents amounts both billed and unbilled. Discretionary services requested by customers are provided at a point in time with control transferring upon the completion of the service. Revenue for discretionary services provided by Houston Electric is recognized upon completion of service based on the tariff rates set by the PUCT. Payments for electricity distribution and discretionary services are aggregated and received on a monthly basis. Houston Electric performs transmission services over time as a stand-ready obligation to provide a reliable network of transmission systems. Revenue is recognized upon time elapsed, and the monthly tariff rate set by the regulator. Payments are received on a monthly basis. Indiana Electric customers are billed monthly and payment terms, set by the regulator, require payment within a month of billing. Natural Gas (CenterPoint Energy and CERC). CenterPoint Energy and CERC distribute and transport natural gas to customers over time and customers consume the natural gas when delivered. Revenue, consisting of both volumetric and fixed tariff rates set by the state governing agency for that service area, is recognized as natural gas is delivered and represents amounts both billed and unbilled. Discretionary services requested by the customer are provided at a point in time with control transferring upon completion of the service. Revenue for discretionary services is recognized upon completion of service based on the tariff rates set by the applicable state regulator. Payments of natural gas distribution, transportation and discretionary services are aggregated and received on a monthly basis. Contract Balances. When the timing of delivery of service is different from the timing of the payments made by customers and when the right to consideration is conditioned on something other than the passage of time, the Registrants recognize a contract liability when customer payment precedes performance. Those customers that prepay are represented by contract liabilities until the performance obligations are satisfied. The Registrants’ contract liabilities are included in Accounts payable and Other current liabilities in their Condensed Consolidated Balance Sheets.
Allowance for Credit Losses	Allowance for Credit Losses CenterPoint Energy and CERC segregate financial assets that fall under the scope of Topic 326, primarily trade receivables due in one year or less, into portfolio segments based on shared risk characteristics, such as geographical location and regulatory environment, for evaluation of expected credit losses. Historical and current information, such as average write-offs, are applied to each portfolio segment to estimate the allowance for losses on uncollectible receivables. Additionally, the allowance for losses on uncollectible receivables is adjusted for reasonable and supportable forecasts of future economic conditions, which can include changing weather, commodity prices, regulations, and macroeconomic factors, among others. Houston Electric had no material changes in its methodology to recognize losses on financial assets that fall under the scope of
Fair Value Measurements	Assets and liabilities that are recorded at fair value in the Registrants’ Condensed Consolidated Balance Sheets are categorized based upon the level of judgment associated with the inputs used to measure their value. Hierarchical levels, as defined below and directly related to the amount of subjectivity associated with the inputs to fair valuations of these assets and liabilities, are as follows: Level 1: Inputs are unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date. The types of assets carried at Level 1 fair value generally are exchange-traded derivatives and equity securities. Level 2: Inputs, other than quoted prices included in Level 1, are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices for similar instruments in active markets and inputs other than quoted prices that are observable for the asset or liability. Fair value assets and liabilities that are generally included in this category are derivatives with fair values based on inputs from actively quoted markets. A market approach is utilized to value the Registrants’ Level 2 natural gas derivative assets or liabilities. CenterPoint Energy’s Level 2 indexed debt securities derivative is valued using an option model and a discounted cash flow model, which uses projected dividends on the ZENS-Related Securities and a discount rate as observable inputs. Level 3: Inputs are unobservable for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. Unobservable inputs reflect the Registrants’ judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. The Registrants develop these inputs based on the best information available, including the Registrants’ own data. The Registrants determine the appropriate level for each financial asset and liability on a quarterly basis.
Earnings Per Share	Basic earnings per common share is computed by dividing income available to common shareholders by the weighted average number of common shares outstanding during the period. Participating securities are excluded from weighted average number of common shares outstanding in the computation of basic earnings per common share. Diluted earnings per common share is computed by dividing income available to common shareholders by the weighted average number of common shares outstanding, including all potentially dilutive common shares, if the effect of such common shares is dilutive. Diluted earnings per common share reflects the dilutive effect of potential common shares from share-based awards. The dilutive effect of restricted stock is computed using the if-converted method, which assumes conversion of the restricted stock at the beginning of the period. The dilutive effect of restricted stock is computed using the treasury stock method, as applicable, which includes the incremental shares that would be hypothetically vested in excess of the number of shares assumed to be hypothetically repurchased with the assumed proceeds. Diluted earnings per common share will also reflect the dilutive effect of potential common shares from the conversion of the Convertible Notes. Convertible debt in which the principal amount must be settled in cash is excluded from the calculation of diluted earnings per common share. There would be no interest expense adjustment to the numerator for the cash-settled portion of the Convertible Notes because that portion will always be settled in cash. The conversion spread value in shares will be included in diluted earnings per common share using the if-converted method if the convertible debt is in the money. The denominator of diluted earnings per common share is determined by dividing the conversion spread value of the share-settled portion of the Convertible Notes as of the reporting date by the average share price over the reporting period. For the three months ended March 31, 2024, the convertible debt was not in the money; therefore, no incremental shares were assumed converted or included in the diluted earnings per share calculation below. For further details about the Convertible Notes, see Note 11 .

Held for Sale and Divestiture_2

Held for Sale and Divestitures (CenterPoint Energy and CERC) (Tables)	3 Months Ended
	Mar. 31, 2024
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Disposal Groups, Including Discontinued Operations	The assets and liabilities of the Louisiana and Mississippi natural gas LDC businesses classified as held for sale in CenterPoint Energy’s and CERC’s Condensed Consolidated Balance Sheets, as applicable, included the following: March 31, 2024 CenterPoint Energy CERC (in millions) Receivables, net $ 33 $ 33 Accrued unbilled revenues 20 20 Natural gas inventory 1 1 Materials and supplies 13 13 Property, plant and equipment, net 984 984 Goodwill 217 122 Regulatory assets 55 55 Other 2 2 Total current assets held for sale $ 1,325 $ 1,230 Accounts payable 25 25 Customer deposits 14 14 Regulatory liabilities 94 94 Other 91 91 Total current liabilities held for sale $ 224 $ 224 The pre-tax income for the Louisiana and Mississippi Natural Gas businesses, excluding interest and corporate allocations, included in CenterPoint Energy’s and CERC’s Condensed Statements of Consolidated Income is as follows: Three Months Ended March 31, 2024 2023 (in millions) Income Before Income Taxes $ 41 $ 32 The pre-tax loss for Energy Systems Group, excluding interest and corporate allocations, included in CenterPoint Energy’s Condensed Statements of Consolidated Income is as follows: Three Months Ended March 31, 2023 (in millions) Loss from Continuing Operations Before Income Taxes $ 6

Revenue Recognition and Allow_2

Revenue Recognition and Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The following tables disaggregate revenues by reportable segment and major source: CenterPoint Energy Three Months Ended March 31, 2024 Electric Natural Gas Corporate Total (in millions) Revenue from contracts with customers $ 1,052 $ 1,541 $ 1 $ 2,594 Other (1) (3) 29 — 26 Total revenues $ 1,049 $ 1,570 $ 1 $ 2,620 Three Months Ended March 31, 2023 Electric Natural Gas Corporate Total (in millions) Revenue from contracts with customers $ 958 $ 1,752 $ 51 $ 2,761 Other (1) (6) 23 1 18 Total revenues $ 952 $ 1,775 $ 52 $ 2,779 (1) Primarily consists of income from ARPs and leases. Total lease income was $2 million for both the three months ended March 31, 2024 and 2023. Houston Electric Three Months Ended March 31, 2024 2023 (in millions) Revenue from contracts with customers $ 910 $ 803 Other (1) (9) (11) Total revenues $ 901 $ 792 (1) Primarily consists of income from ARPs and leases. Lease income was not significant for the three months ended March 31, 2024 and 2023. CERC Three Months Ended March 31, 2024 2023 (in millions) Revenue from contracts with customers $ 1,485 $ 1,700 Other (1) 27 17 Total revenues $ 1,512 $ 1,717 (1) Primarily consists of income from ARPs and leases. Lease income was not significant for the three months ended March 31, 2024 and 2023.
Schedule of Contract with Customer, Contract Asset, Contract Liability and Receivable	The opening and closing balances of accounts receivable, other accrued unbilled revenues and contract liabilities from contracts with customers are as follows: CenterPoint Energy Accounts Receivable Other Accrued Unbilled Revenues Contract Liabilities (in millions) Opening balance as of December 31, 2023 $ 652 $ 516 $ 2 Closing balance as of March 31, 2024 656 392 3 Decrease $ 4 $ (124) $ 1 The amount of revenue recognized during the three months ended March 31, 2024 that was included in the opening contract liability was $1 million. The difference between the opening and closing balances of the contract liabilities primarily results from the timing difference between CenterPoint Energy’s performance and the customer’s payment. Houston Electric Accounts Receivable Other Accrued Unbilled Revenues Contract Liabilities (in millions) Opening balance as of December 31, 2023 $ 275 $ 142 $ 2 Closing balance as of March 31, 2024 250 122 3 Increase (decrease) $ (25) $ (20) $ 1 The amount of revenue recognized during the three months ended March 31, 2024 that was included in the opening contract liability was $1 million. The difference between the opening and closing balances of the contract liabilities primarily results from the timing difference between Houston Electric’s performance and the customer’s payment. CERC Accounts Receivable Other Accrued Unbilled Revenues (in millions) Opening balance as of December 31, 2023 $ 330 $ 329 Closing balance as of March 31, 2024 355 233 Decrease $ 25 $ (96) CERC does not have any opening or closing contract asset or contract liability balances.

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	3 Months Ended
Employee Benefit Plans (Tables)	Mar. 31, 2024
Retirement Benefits [Abstract]
Schedule of Net Benefit Costs	The Registrants’ net periodic cost, before considering amounts subject to overhead allocations for capital expenditure projects or for amounts subject to deferral for regulatory purposes, includes the following components relating to pension and postretirement benefits: Pension Benefits (CenterPoint Energy) Three Months Ended March 31, 2024 2023 (in millions) Service cost (1) $ 6 $ 6 Interest cost (2) 19 19 Expected return on plan assets (2) (19) (19) Amortization of net loss (2) 7 7 Settlement cost (2) (3) — 1 Net periodic cost $ 13 $ 14 (1) Amounts presented in the table above are included in Operation and maintenance expense in CenterPoint Energy’s Condensed Statements of Consolidated Income, net of amounts capitalized and regulatory deferrals. (2) Amounts presented in the table above are included in Other income, net in CenterPoint Energy’s Condensed Statements of Consolidated Income, net of regulatory deferrals. (3) Amounts presented represent a one-time, non-cash settlement cost, prior to regulatory deferrals, which are required when the total lump sum distributions or other settlements of plan benefit obligations during a plan year exceed the service cost and interest cost components of the net periodic cost for that year. Postretirement Benefits Three Months Ended March 31, 2024 2023 CenterPoint Energy Houston Electric CERC CenterPoint Energy Houston Electric CERC (in millions) Interest cost (1) $ 3 $ 1 $ 1 $ 3 $ 1 $ 1 Expected return on plan assets (1) (1) (1) — (1) (1) — Amortization of prior service cost (credit) (1) (1) (1) 1 — (1) 1 Amortization of net loss (1) (2) (1) (1) (2) (1) (1) Net periodic cost (benefit) $ (1) $ (2) $ 1 $ — $ (2) $ 1 (1) Amounts presented in the tables above are included in Other income (expense), net in each of the Registrants’ respective Condensed Statements of Consolidated Income, net of regulatory deferrals.
Schedule of Benefit Plan Contributions	The table below reflects the expected contributions to be made to the pension and postretirement benefit plans during 2024: CenterPoint Energy Houston Electric CERC (in millions) Expected contribution to pension plans during 2024 $ 9 $ — $ — Expected contribution to postretirement benefit plans in 2024 8 1 4 The table below reflects the contributions made to the pension and postretirement benefit plans during the period presented: Three Months Ended March 31, 2024 CenterPoint Energy Houston Electric CERC (in millions) Pension plans $ 2 $ — $ — Postretirement benefit plans 2 — 1

Regulatory Matters (Tables)

Regulatory Matters (Tables)	3 Months Ended
Regulatory Matters (Tables)	Mar. 31, 2024
Regulated Operations [Abstract]
Schedule of Allowed Equity Return Not Recognized	The recoverable allowed equity return not yet recognized by the Registrants is as follows: March 31, 2024 December 31, 2023 CenterPoint Energy (1) Houston Electric (2) CERC (3) CenterPoint Energy (1) Houston Electric (2) CERC (3) (in millions) Unrecognized equity return $ 204 $ 69 $ 73 $ 204 $ 75 $ 69 (1) In addition to the amounts described in (2) and (3) below, represents CenterPoint Energy’s allowed equity return on post in-service carrying cost generally associated with investments in Indiana. (2) Represents Houston Electric’s allowed equity return on its true-up balance of stranded costs, other changes and related interest resulting from the formerly integrated electric utilities prior to Texas deregulation to be recovered in rates through 2024 and certain TEEEF costs and storm restoration costs. (3) CERC’s allowed equity return on post in-service carrying cost associated with certain distribution facilities replacements expenditures in Texas and costs associated with investments in Indiana.
Schedule of Amount Allowed Equity Return Recognized in Period	The table below reflects the amount of allowed equity return recognized by each Registrant in its Condensed Statements of Consolidated Income: Three Months Ended March 31, 2024 2023 CenterPoint Energy Houston Electric CERC CenterPoint Energy Houston Electric CERC (in millions) Allowed equity return recognized $ 9 $ 8 $ 1 $ 8 $ 7 $ 1

Derivative Instruments (Tables)

Derivative Instruments (Tables)	3 Months Ended
Derivative Instruments (Tables)	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional Amounts of Outstanding Derivative Positions	The table below summarizes CenterPoint Energy’s and Houston Electric’s outstanding interest rate hedging activity: March 31, 2024 December 31, 2023 Hedging Classification Notional Principal (in millions) CenterPoint Energy: Cash flow hedge (1) (2) 150 200 Houston Electric: Cash flow hedge (2) — 100 (1) Relates to interest rate derivative instruments at CenterPoint Energy with a termination date of December 31, 2029. The interest rate swap agreements were designated as cash flow hedges of forecasted transactions. CenterPoint Energy records all changes in the fair value of cash flow hedges in accumulated other comprehensive income (loss) until the underlying hedged transaction occurs, when it reclassifies that amount into earnings. (2) Relates to interest rate derivative instruments at Houston Electric with a termination date of June 28, 2024. The interest rate treasury lock agreements were designated as cash flow hedges of forecasted transactions. Houston Electric records all changes in the fair value of cash flow hedges to a regulatory asset or liability, which is amortized over the life of the associated debt being hedged.
Schedule of Fair Value of Derivative Instruments	The following tables provide a balance sheet overview of CenterPoint Energy’s and CERC’s derivative assets and liabilities, while the last table provides a breakdown of the related income statement impacts. March 31, 2024 December 31, 2023 Balance Sheet Location Derivative Derivative Liabilities Derivative Derivative Liabilities CenterPoint Energy: (in millions) Derivatives designated as cash flow hedges: Interest rate derivatives Current Assets: Non-trading derivative assets $ 3 $ — $ — $ — Derivatives not designated as hedging instruments: Natural gas derivatives (1) Current Liabilities: Non-trading derivative liabilities $ — $ 9 $ — $ 9 Natural gas derivatives (1) Other Liabilities: Non-trading derivative liabilities — 3 — 3 Indexed debt securities derivative (2) Current Liabilities — 520 — 605 Total $ 3 $ 532 $ — $ 617 (1) Natural gas contracts are subject to master netting arrangements. This netting applies to all undisputed amounts due or past due. However, the mark-to-market fair value of each natural gas contract is in a liability position with no offsetting amounts as of March 31, 2024 and December 31, 2023, respectively. As of March 31, 2024 and December 31, 2023, the notional volume of natural gas derivatives were 20,712 MMBtu per day and 27,421 MMBtu per day, respectively. (2) Derivative component of the ZENS obligation that represents the ZENS holder’s option to receive the appreciated value of the reference shares at maturity and other payments to which they may be entitled. See Note 10 for further information. March 31, 2024 December 31, 2023 Balance Sheet Location Derivative Derivative Liabilities Derivative Derivative Liabilities CERC: (in millions) Derivatives not designated as hedging instruments: Natural gas derivatives (1) Current Liabilities: Non-trading derivative liabilities $ — $ 8 $ — $ 8 Natural gas derivatives (1) Other Liabilities: Non-trading derivative liabilities — 2 — 3 Total $ — $ 10 $ — $ 11 (1)
Schedule of Income Statement Impact of Derivative Activity	The table below provides the related income statement impacts of derivative activity for the periods presented: Three Months Ended March 31, Income Statement Location 2024 2023 CenterPoint Energy: (in millions) Derivatives not designated as hedging instruments: Indexed debt securities derivative (1) Gain (loss) on indexed debt securities $ 85 $ (39) (1) The indexed debt securities derivative is recorded at fair value and changes in the fair value are recorded in CenterPoint Energy’s Condensed Statements of Consolidated Income. Cash inflows and outflows associated with derivatives are included in operating activities on the statement of cash flows. (c) Credit Risk Contingent Features (CenterPoint Energy and CERC) Certain of CenterPoint Energy’s and CERC’s derivative instruments contain provisions that require CenterPoint Energy and CERC to maintain an investment grade credit rating on their respective long-term unsecured unsubordinated debt from S&P and Moody’s. If CenterPoint Energy’s or CERC’s debt were to fall below investment grade, it would be in violation of these provisions, and the counterparties to the derivative instruments could request immediate payment or additional collateral. The table below sets forth additional detail for the periods presented: March 31, 2024 December 31, 2023 CenterPoint Energy CERC CenterPoint Energy CERC (in millions) Aggregate fair value of derivatives containing material adverse change provisions in a net liability position $ 9 $ 8 $ 9 $ 8 Fair value of collateral already posted — — — — Additional collateral required to be posted if credit risk contingent features triggered 9 8 9 8

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
Fair Value Measurements (Tables)	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on a Recurring Basis	The following tables present information about the Registrants’ assets and liabilities measured at fair value on a recurring basis as of March 31, 2024 and December 31, 2023 and indicate the fair value hierarchy of the valuation techniques utilized by the Registrants to determine such fair value. CenterPoint Energy March 31, 2024 December 31, 2023 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets (in millions) Equity securities $ 458 $ — $ — $ 458 $ 541 $ — $ — $ 541 Investments, including money market funds (1) 37 — — 37 31 — — 31 Interest rate derivatives — 3 — 3 — — — — Total assets $ 495 $ 3 $ — $ 498 $ 572 $ — $ — $ 572 Liabilities Indexed debt securities derivative $ — $ 520 $ — $ 520 $ — $ 605 $ — $ 605 Natural gas derivatives — 12 — 12 — 12 — 12 Total liabilities $ — $ 532 $ — $ 532 $ — $ 617 $ — $ 617 Houston Electric March 31, 2024 December 31, 2023 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets (in millions) Investments, including money market funds (1) $ 21 $ — $ — $ 21 $ 14 $ — $ — $ 14 Total assets $ 21 $ — $ — $ 21 $ 14 $ — $ — $ 14 CERC March 31, 2024 December 31, 2023 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets (in millions) Investments, including money market funds (1) $ 15 $ — $ — $ 15 $ 15 $ — $ — $ 15 Total assets $ 15 $ — $ — $ 15 $ 15 $ — $ — $ 15 Liabilities Natural gas derivatives $ — $ 10 $ — $ 10 $ — $ 11 $ — $ 11 Total liabilities $ — $ 10 $ — $ 10 $ — $ 11 $ — $ 11 (1) Amounts are included in Prepaid expenses and other current assets in the Condensed Consolidated Balance Sheets.
Schedule of Estimated Fair Value of Financial Instruments, Debt Instruments	The fair values of cash and cash equivalents, investments in debt and equity securities measured at fair value and short-term borrowings are estimated to be approximately equivalent to carrying amounts and have been excluded from the table below. The carrying amounts of non-trading derivative assets and liabilities and CenterPoint Energy’s ZENS indexed debt securities derivative are stated at fair value and are excluded from the table below. The fair value of each debt instrument is determined by multiplying the principal amount of each debt instrument by a combination of historical trading prices and comparable issue data. These liabilities, which are not measured at fair value in the Registrants’ Condensed Consolidated Balance Sheets, but for which the fair value is disclosed, would be classified as Level 2 in the fair value hierarchy. March 31, 2024 December 31, 2023 CenterPoint Energy (1) Houston Electric (1) CERC CenterPoint Energy (1) Houston Electric (1) CERC Long-term debt, including current maturities (in millions) Carrying amount $ 19,145 $ 7,984 $ 4,719 $ 18,609 $ 7,587 $ 4,670 Fair value 18,020 7,115 4,599 17,804 6,917 4,627 (1) Includes Securitization Bonds, as applicable.

Goodwill (CenterPoint Energy _2

Goodwill (CenterPoint Energy and CERC) (Tables)	3 Months Ended
Goodwill (CenterPoint Energy and CERC) (Tables)	Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	CenterPoint Energy’s goodwill by reportable segment as of both March 31, 2024 and December 31, 2023 is as follows: December 31, 2023 Held For Sale March 31, 2024 (in millions) Electric (1) $ 936 $ — $ 936 Natural gas (2) 2,920 217 2,703 Corporate and other 304 — 304 Total $ 4,160 $ 217 $ 3,943 (1) Amount presented is net of the accumulated goodwill impairment charge of $185 million recorded in 2020. (2) If a disposal group reflects a component of a reporting unit and meets the definition of a business, the goodwill within that reporting unit is allocated to the disposal group based on the relative fair value of the components representing a business that will be retained and disposed. As a result, goodwill attributable to the Louisiana and Mississippi natural gas LDC businesses to be disposed of is classified as held for sale as of March 31, 2024. CenterPoint Energy has not recognized any goodwill impairments within the Natural Gas reportable segment during the three months ended March 31, 2024. For further information, see Note 3. CERC’s goodwill as of both March 31, 2024 and December 31, 2023 is as follows: December 31, 2023 Held For Sale March 31, 2024 (in millions) Goodwill (1) $ 1,583 $ 122 $ 1,461 (1) In connection with the classification of the Louisiana and Mississippi natural gas LDC businesses as held for sale as of March 31, 2024 described above, goodwill attributable to CERC to be disposed of as part of the transaction is classified as held for sale as of March 31, 2024. CERC has not recognized any goodwill impairments during the three months ended March 31, 2024. For further information, see Note 3.

Equity Securities and Indexed_2

Equity Securities and Indexed Debt Securities (ZENS) (CenterPoint Energy) (Tables)	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Schedule of Gain (Loss) on Securities	Gains and losses on equity securities, net of transaction costs, are recorded in Gain (loss) on equity securities in CenterPoint Energy’s Condensed Statements of Consolidated Income. The following table presents unrealized gains (losses), net on equity securities owned by CenterPoint Energy for each period presented: Three Months Ended March 31, 2024 2023 (in millions) AT&T Common $ 9 $ 9 Charter Common (85) 16 WBD Common (7) 14 Other — (1) Total gains (losses) on equity securities, net $ (83) $ 38
Schedule of Debt Securities, Trading, and Equity Securities, FV-NI	CenterPoint Energy and its subsidiaries hold shares of certain securities detailed in the table below, which are classified as trading securities. Shares of AT&T Common, Charter Common and WBD Common are expected to be held to facilitate CenterPoint Energy’s ability to meet its obligation under the ZENS. The following table presents information on CenterPoint Energy’s equity securities for each period presented: Shares Held Carrying Value March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 (in millions) AT&T Common 10,212,945 10,212,945 $ 180 $ 171 Charter Common 872,503 872,503 254 339 WBD Common 2,470,685 2,470,685 21 28 Other 3 3 Total $ 458 $ 541
Schedule of Indexed Debt Securities and Marketable Securities	CenterPoint Energy’s reference shares for each ZENS consisted of the following: March 31, 2024 December 31, 2023 (in shares) AT&T Common 0.7185 0.7185 Charter Common 0.061382 0.061382 WBD Common 0.173817 0.173817

Short-term Borrowings and Lon_2

Short-term Borrowings and Long-term Debt (Tables)	3 Months Ended
Short-term Borrowings and Long-term Debt (Tables)	Mar. 31, 2024
Debt Disclosure [Abstract]
Schedule of Line of Credit Facilities	The Registrants had the following revolving credit facilities as of March 31, 2024: Execution Registrant Size of Draw Rate of SOFR plus (1) Financial Covenant Limit on Debt for Borrowed Money to Capital Ratio Debt for Borrowed Money to Capital Ratio as of March 31, 2024 (2) Termination Date (in millions) December 6, 2022 CenterPoint Energy $ 2,400 1.500% 65.0% (3) 59.6% December 6, 2027 December 6, 2022 CenterPoint Energy (4) 250 1.125% 65.0% 46.7% December 6, 2027 December 6, 2022 Houston Electric 300 1.250% 67.5% (3) 52.9% December 6, 2027 December 6, 2022 CERC 1,050 1.125% 65.0% 39.9% December 6, 2027 Total $ 4,000 (1) Based on credit ratings as of March 31, 2024. (2) As defined in the revolving credit facility agreements, excluding Securitization Bonds. (3) For CenterPoint Energy and Houston Electric, the financial covenant limit will temporarily increase to 70% if Houston Electric experiences damage from a natural disaster in its service territory and CenterPoint Energy certifies to the administrative agent that Houston Electric has incurred system restoration costs reasonably likely to exceed $100 million in a consecutive 12-month period, all or part of which Houston Electric intends to seek to recover through securitization financing. Such temporary increase in the financial covenant would be in effect from the date CenterPoint Energy delivers its certification until the earliest to occur of (i) the completion of the securitization financing, (ii) the first anniversary of CenterPoint Energy’s certification or (iii) the revocation of such certification. (4) This credit facility was issued by SIGECO. The table below reflects the utilization of the Registrants’ respective revolving credit facilities: March 31, 2024 December 31, 2023 Registrant Loans Letters Commercial Weighted Average Interest Rate Loans Letters Commercial Weighted Average Interest Rate (in millions, except weighted average interest rate) CenterPoint Energy $ — $ — $ 1,145 5.49 % $ — $ — $ 1,036 5.54 % CenterPoint Energy (1) — — — — % — — — — % Houston Electric — — — — % — — — — % CERC — 1 532 5.47 % — 1 484 5.53 % Total $ — $ 1 $ 1,677 $ — $ 1 $ 1,520 (1) This credit facility was issued by SIGECO. (2) CenterPoint Energy’s and CERC’s outstanding commercial paper generally have maturities of up to 60 days and 30 days, respectively, and are backstopped by the respective issuer’s long-term revolving credit facility. Neither Houston Electric nor SIGECO has a commercial paper program.

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
Income Taxes (Tables)	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation	The Registrants reported the following effective tax rates: Three Months Ended March 31, 2024 2023 CenterPoint Energy (1) 18 % 19 % Houston Electric (2) 20 % 23 % CERC (3) 19 % 22 % (1) CenterPoint Energy’s lower effective tax rate for the three months ended March 31, 2024 compared to the same period ended March 31, 2023 was primarily due to the tax impacts of the state deferred remeasurement benefit of $25 million related to the Louisiana and Mississippi natural gas LDC businesses sale, which met the held for sale criteria in the first quarter of 2024 and is described further below. This was partially offset by the tax impacts of the valuation allowance of $21 million established against Louisiana and Mississippi NOLs, since those NOLs will not be utilized due to the Louisiana and Mississippi natural gas LDC businesses sale. See Note 3 for further details. (2) Houston Electric’s lower effective tax rate for the three months ended March 31, 2024 compared to the same period ended March 31, 2023 was primarily driven by a decrease in state income taxes and an increase in EDIT amortization. (3) CERC’s lower effective tax rate for the three months ended March 31, 2024 compared to the same period ended March 31, 2023 was primarily driven by the tax impacts of the state deferred remeasurement benefit of $24 million associated with the Louisiana and Mississippi natural gas LDC businesses sale meeting the held for sale criteria in the first quarter of 2024. For tax purposes, when the held for sale criteria is met, the CERC and unitary state apportionment rates must be updated to account for the sale and applied to the estimated post-sale net deferred tax liability. This impact was partially offset by the tax impacts of a valuation allowance of $21 million against Louisiana and Mississippi NOLs, since those NOLs will not be utilized due to the Louisiana and Mississippi natural gas LDC businesses sale. Additionally, state income tax expense has decreased as a result of higher revenues in states with lower tax rates.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
Commitments and Contingencies (Tables)	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Schedule of Long-term Purchase Commitment	As of March 31, 2024, other than discussed below, minimum purchase obligations were approximately: CenterPoint Energy CERC Natural Gas Supply Electric Supply (1) Other (2) Natural Gas Supply (in millions) Remaining nine months of 2024 $ 427 $ 117 $ 117 $ 423 2025 596 461 59 592 2026 536 113 61 532 2027 466 105 17 462 2028 399 68 12 395 2029 386 66 1 382 2030 and beyond 1,392 696 306 1,373 (1) CenterPoint Energy’s undiscounted minimum payment obligations related to PPAs with commitments ranging from 15 years to 25 years and its purchase commitments under its BTA in Posey County, Indiana at the original contracted amount. (2) The undiscounted payment obligations relate primarily to technology hardware and software agreements.
Schedule of Environmental Loss Contingencies by Site	Total costs that may be incurred in connection with addressing these sites cannot be determined at this time. The estimated accrued costs are limited to CenterPoint Energy’s and CERC’s share of the remediation efforts and are therefore net of exposures of other PRPs. The estimated range of possible remediation costs for the sites for which CenterPoint Energy and CERC believe they may have responsibility was based on remediation continuing for the minimum time frame given in the table below: March 31, 2024 CenterPoint Energy CERC (in millions, except years) Amount accrued for remediation $ 13 $ 11 Minimum estimated remediation costs 8 7 Maximum estimated remediation costs 47 40 Minimum years of remediation 5 5 Maximum years of remediation 50 50

Earnings Per Share (CenterPoi_2

Earnings Per Share (CenterPoint Energy) (Tables)	3 Months Ended
Earnings Per Share (CenterPoint Energy) (Tables)	Mar. 31, 2024
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table reconciles numerators and denominators of CenterPoint Energy’s basic and diluted earnings per common share. Three Months Ended March 31, 2024 2023 (in millions, except per share and share amounts) Numerator: Net income $ 350 $ 325 Less: Preferred stock dividend requirement (Note 18) — 12 Income available to common shareholders - basic and diluted $ 350 $ 313 Denominator: Weighted average common shares outstanding - basic 632,228,000 630,309,000 Plus: Incremental shares from assumed conversions: Restricted stock 1,742,000 2,742,000 Weighted average common shares outstanding - diluted 633,970,000 633,051,000 Earnings Per Common Share: Basic Earnings Per Common Share $ 0.55 $ 0.50 Diluted Earnings Per Common Share $ 0.55 $ 0.49

Reportable Segments (Tables)

Reportable Segments (Tables)	3 Months Ended
Reportable Segments (Tables)	Mar. 31, 2024
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Financial data for reportable segments is as follows: CenterPoint Energy Three Months Ended March 31, 2024 2023 Revenues from Net Income (Loss) Revenues from Net Income (in millions) Electric $ 1,049 (1) $ 121 $ 952 (1) $ 123 Natural Gas 1,570 283 1,775 234 Corporate and Other 1 (54) 52 (32) Consolidated $ 2,620 $ 350 $ 2,779 $ 325 Total Assets March 31, 2024 December 31, 2023 (in millions) Electric $ 21,688 $ 21,089 Natural Gas 17,611 17,429 Corporate and Other, net of eliminations (1) 900 1,197 Consolidated $ 40,199 $ 39,715 (1) Total assets included pension and other postemployment-related regulatory assets of $379 million and $385 million as of March 31, 2024 and December 31, 2023, respectively.

Supplemental Disclosure of Ca_2

Supplemental Disclosure of Cash Flow Information (Tables)	3 Months Ended
Supplemental Disclosure of Cash Flow Information (Tables)	Mar. 31, 2024
Supplemental Cash Flow Elements [Abstract]
Schedule of Cash Flow, Supplemental Disclosures	The table below provides supplemental disclosure of cash flow information: Three Months Ended March 31, 2024 2023 CenterPoint Energy Houston Electric CERC CenterPoint Energy Houston Electric CERC (in millions) Cash Payments/Receipts: Interest, net of capitalized interest $ 228 $ 59 $ 76 $ 191 $ 78 $ 58 Income tax refunds, net (12) — — (1) — — Non-cash transactions: Accounts payable related to capital expenditures 195 149 59 270 178 85 ROU assets obtained in exchange for lease liabilities (1) — — — 1 1 — (1) Excludes ROU assets obtained through prepayment of the lease liabilities. See Note 19. The table below provides a reconciliation of cash, cash equivalents and restricted cash reported in the Condensed Consolidated Balance Sheets to the amount reported in the Condensed Statements of Consolidated Cash Flows: March 31, 2024 December 31, 2023 CenterPoint Energy Houston Electric CERC CenterPoint Energy Houston Electric CERC (in millions) Cash and cash equivalents (1) $ 161 $ 109 $ 17 $ 90 $ 76 $ 1 Restricted cash included in Prepaid expenses and other current assets (2) 18 13 — 19 13 — Total cash, cash equivalents and restricted cash shown in Condensed Statements of Consolidated Cash Flows $ 179 $ 122 $ 17 $ 109 $ 89 $ 1 (1) Cash and cash equivalents related to VIEs as of March 31, 2024 and December 31, 2023 included $132 million and $90 million, respectively, at CenterPoint Energy and $109 million and $76 million, respectively, at Houston Electric. (2) Restricted cash primarily related to accounts established by CenterPoint Energy and Houston Electric in connection with the issuance of the Securitization Bonds to collateralize the Securitization Bonds that were issued in these financing transactions. These restricted cash accounts are not available for withdrawal until the maturity of the Securitization Bonds. Supplemental Disclosure of Balance Sheet Information Included in other current liabilities on CERC’s Consolidated Balance Sheets as of March 31, 2024 and December 31, 2023 was $65 million and $118 million, respectively, of credits related to customers on budget billing programs. Included in other current liabilities on Houston Electric’s Consolidated Balance Sheets as of March 31, 2024 and December 31, 2023 was $50 million and $47 million, respectively, of accrued contributions in aid of construction.

Related Party Transactions (H_2

Related Party Transactions (Houston Electric and CERC) (Tables)	3 Months Ended
	Mar. 31, 2024
Related Party Transactions [Abstract]
Schedule of Money Pool Investment and Borrowing	The table below summarizes CenterPoint Energy money pool activity: March 31, 2024 December 31, 2023 Houston Electric CERC Houston Electric CERC (in millions, except interest rates) Money pool investments (borrowings) (1) $ 573 $ — $ 238 $ 1 Weighted average interest rate 5.55 % — % 5.59 % 5.59 % (1) Included in Accounts and notes receivable (payable)–affiliated companies on Houston Electric’s and CERC’s respective Condensed Consolidated Balance Sheets, as applicable.
Schedule of Related Party Transactions	Amounts charged for these services were as follows and are included primarily in Operation and maintenance expenses on the Condensed Statements of Consolidated Income: Three Months Ended March 31, 2024 2023 Houston Electric CERC Houston Electric CERC (in millions) Corporate service charges $ 35 $ 51 $ 35 $ 50 Net affiliate service charges (billings) (1) 1 (3) 3 The table below presents transactions among Houston Electric, CERC and their parent, Utility Holding: Three Months Ended March 31, 2024 2023 Houston Electric CERC Houston Electric CERC (in millions) Cash dividends paid to parent $ 36 $ 115 $ 51 $ 204 Cash contribution from parent 230 — 650 —

Equity (Tables)

Equity (Tables)	3 Months Ended
Equity (Tables)	Mar. 31, 2024
Equity [Abstract]
Schedule of Dividends Declared	Dividends Declared and Paid (CenterPoint Energy) CenterPoint Energy declared and paid dividends on its Common Stock as follows during the periods indicated below: Dividends Declared Per Share Dividends Paid Per Share Three Months Ended March 31, Three Months Ended March 31, 2024 2023 2024 2023 Common Stock $ — $ — $ 0.200 $ 0.190 Series A Preferred Stock (1) — — — 30.625 (1) All of the outstanding shares of Series A Preferred Stock were redeemed during September 2023 as further described below. Dividend Declarations(CenterPoint Energy) Equity Instrument Declaration Date Record Date Payment Date Per Share Common Stock April 26, 2024 May 16, 2024 June 13, 2024 $ 0.2000
Schedule of Dividend Requirement on Preferred Stock	Income Allocated to Series A Preferred Shareholders (CenterPoint Energy) Three Months Ended March 31, 2024 2023 (in millions) Series A Preferred Stock (1) $ — $ 12 Total income allocated to preferred shareholders $ — $ 12 (1) All of the outstanding shares of Series A Preferred Stock were redeemed during September 2023 as further described below. Series A Preferred Stock Redemption (CenterPoint Energy) On September 1, 2023, CenterPoint Energy redeemed 800,000 shares of CenterPoint Energy’s Series A Preferred Stock, in whole for cash at a redemption price of $1,000 per share, plus any accumulated and unpaid dividends thereon to, but excluding, the redemption date.
Schedule of Accumulated Other Comprehensive Income (Loss)	Changes in accumulated comprehensive income (loss) are as follows: Three Months Ended March 31, 2024 2023 CenterPoint Energy CERC CenterPoint Energy CERC (in millions) Beginning Balance $ (35) $ 16 $ (31) $ 16 Other comprehensive income (loss) before reclassifications: Remeasurement of pension and other postretirement plans (2) — — — Net deferred gain from cash flow hedges 3 — — — Prior service cost (1) — — (1) (1) Actuarial losses (1) 1 (1) — — Other comprehensive income (loss) 2 (1) (1) (1) Ending Balance $ (33) $ 15 $ (32) $ 15 (1) Amounts are included in the computation of net periodic cost and are reflected in Other income, net in each of the Registrants’ respective Condensed Statements of Consolidated Income.

Leases (Tables)

Leases (Tables)	3 Months Ended
Leases (Tables)	Mar. 31, 2024
Leases [Abstract]
Schedule of Lease Cost	The components of lease cost, included in Operation and maintenance expense on the Registrants’ respective Condensed Statements of Consolidated Income, are as follows: Three Months Ended March 31, 2024 2023 CenterPoint Energy Houston CERC CenterPoint Energy Houston CERC (in millions) Operating lease cost $ 1 $ 1 $ — $ 2 $ 1 $ — Short-term lease cost 2 2 — — (1) — Total lease cost (1) $ 3 $ 3 $ — $ 2 $ — $ — (1) CenterPoint Energy and Houston Electric defer finance lease costs for TEEEF to Regulatory assets for recovery rather than to Depreciation and Amortization in the Condensed Statements of Consolidated Income.
Schedule of Operating Lease Income	The components of lease income were as follows: Three Months Ended March 31, 2024 2023 CenterPoint Energy Houston CERC CenterPoint Energy Houston CERC (in millions) Operating lease income $ 2 $ — $ 1 $ 2 $ — $ 1 Total lease income $ 2 $ — $ 1 $ 2 $ — $ 1
Schedule of Supplemental Balance Sheet Information Related To Leases	Supplemental balance sheet information related to leases was as follows: March 31, 2024 December 31, 2023 CenterPoint Energy Houston CERC CenterPoint Energy Houston CERC (in millions, except lease term and discount rate) Assets: Operating ROU assets (1) $ 12 $ 5 $ 4 $ 13 $ 6 $ 4 Finance ROU assets (2) 502 502 — 526 526 — Total leased assets $ 514 $ 507 $ 4 $ 539 $ 532 $ 4 Liabilities: Current operating lease liability (3) $ 3 $ 1 $ 1 $ 3 $ 1 $ 1 Non-current operating lease liability (4) 9 4 3 10 5 3 Total leased liabilities (5) $ 12 $ 5 $ 4 $ 13 $ 6 $ 4 Weighted-average remaining lease term (in years) - operating leases 4.5 3.6 2.9 4.7 3.9 3.1 Weighted-average discount rate - operating leases 4.15 % 4.09 % 3.62 % 4.13 % 4.09 % 3.60 % Weighted-average remaining lease term (in years) - finance leases 5.3 5.3 — 5.5 5.5 — Weighted-average discount rate - finance leases 3.60 % 3.60 % — 3.60 % 3.60 % — (1) Reported within Other assets (2) Reported within Property, Plant and Equipment (3) Reported within Current other liabilities (4) Reported within Other liabilities (5) Finance lease liabilities were not significant as of March 31, 2024 or December 31, 2023 and are reported within Other long-term debt in the Registrants’ respective Condensed Consolidated Balance Sheets when applicable.
Schedule of Operating Lease Liability Maturity	As of March 31, 2024, finance lease liabilities were not significant to the Registrants. As of March 31, 2024, maturities of operating lease liabilities were as follows: CenterPoint Houston CERC (in millions) Remainder of 2024 $ 3 $ 2 $ 2 2025 3 2 1 2026 3 1 1 2027 2 1 — 2028 1 — — 2029 1 — — 2030 and beyond 1 — — Total lease payments 14 6 4 Less: Interest 2 1 — Present value of lease liabilities $ 12 $ 5 $ 4
Schedule of Operating Lease Payments to be Received	As of March 31, 2024, maturities of undiscounted operating lease payments to be received are as follows: CenterPoint Houston CERC (in millions) Remainder of 2024 $ 5 $ — $ 3 2025 7 1 5 2026 7 — 5 2027 7 — 5 2028 7 — 5 2029 7 — 6 2030 and beyond 166 — 164 Total lease payments to be received $ 206 $ 1 $ 193
Schedule of Other Information Related To Leases	Other information related to leases is as follows: Three Months Ended March 31, 2024 2023 CenterPoint Houston CERC CenterPoint Houston CERC (in millions) Operating cash flows from operating leases included in the measurement of lease liabilities $ 1 $ — $ — $ 2 $ — $ — Financing cash flows from finance leases included in the measurement of lease liabilities — — — — — —

Subsequent Events (Tables)

Subsequent Events (Tables)	3 Months Ended
Subsequent Events (Tables)	Mar. 31, 2024
Subsequent Events [Abstract]
Schedule of Dividends Declared	Dividends Declared and Paid (CenterPoint Energy) CenterPoint Energy declared and paid dividends on its Common Stock as follows during the periods indicated below: Dividends Declared Per Share Dividends Paid Per Share Three Months Ended March 31, Three Months Ended March 31, 2024 2023 2024 2023 Common Stock $ — $ — $ 0.200 $ 0.190 Series A Preferred Stock (1) — — — 30.625 (1) All of the outstanding shares of Series A Preferred Stock were redeemed during September 2023 as further described below. Dividend Declarations(CenterPoint Energy) Equity Instrument Declaration Date Record Date Payment Date Per Share Common Stock April 26, 2024 May 16, 2024 June 13, 2024 $ 0.2000

Background and Basis of Prese_3

Background and Basis of Presentation (Details)	Mar. 31, 2024 registrant
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of registrants	3

Held for Sale and Divestiture_3

Held for Sale and Divestitures (CenterPoint Energy and CERC) - Narrative (Details) - Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations numberOfCustomer in Thousands, mi in Thousands, $ in Millions		12 Months Ended
	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2024 USD ($)	Feb. 19, 2024 USD ($) numberOfCustomer mi	May 21, 2023 USD ($)
Energy Systems Group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity purchase agreement, purchase price					$ 157
Proceeds from divestitures	$ 154
Adjustments on working capital			$ 2
Loss (gain) on divestitures		$ 13
Transaction costs		3
Current tax expense of divestiture		$ 32
Louisiana and Mississippi Regulated Natural Gas LDC Businesses \| CERC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price				$ 1,200
Miles of pipeline (in miles) \| mi				12
Number of customers (more than) \| numberOfCustomer				300

Held for Sale and Divestiture_4

Held for Sale and Divestitures (CenterPoint Energy and CERC) - Asset and Liabilities Held for Sale (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current assets held for sale	$ 1,325	$ 0
Total current liabilities held for sale	224	0
CERC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current assets held for sale	1,230	0
Total current liabilities held for sale	224	$ 0
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations \| Louisiana and Mississippi Regulated Natural Gas LDC Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables, net	33
Accrued unbilled revenues	20
Natural gas inventory	1
Materials and supplies	13
Property, plant and equipment, net	984
Goodwill	217
Regulatory assets	55
Other	2
Total current assets held for sale	1,325
Accounts payable	25
Customer deposits	14
Regulatory liabilities	94
Other	91
Total current liabilities held for sale	224
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations \| Louisiana and Mississippi Regulated Natural Gas LDC Businesses \| CERC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables, net	33
Accrued unbilled revenues	20
Natural gas inventory	1
Materials and supplies	13
Property, plant and equipment, net	984
Goodwill	122
Regulatory assets	55
Other	2
Total current assets held for sale	1,230
Accounts payable	25
Customer deposits	14
Regulatory liabilities	94
Other	91
Total current liabilities held for sale	$ 224

Held for Sale and Divestiture_5

Held for Sale and Divestitures (CenterPoint Energy and CERC) - Pre Tax Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) Before Income Taxes	$ 428	$ 403
CERC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) Before Income Taxes	324	272
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations \| Louisiana and Mississippi Regulated Natural Gas LDC Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) Before Income Taxes	41	32
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations \| Louisiana and Mississippi Regulated Natural Gas LDC Businesses \| CERC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) Before Income Taxes	41	$ 32
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations \| Energy Systems Group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) Before Income Taxes	$ 6

Revenue Recognition and Allow_3

Revenue Recognition and Allowance for Credit Losses - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue from contracts	$ 2,594	$ 2,761
Other	26	18
Total	2,620	2,779
Lease income	2	2
Houston Electric
Disaggregation of Revenue [Line Items]
Revenue from contracts	910	803
Other	(9)	(11)
Total	901	792
CERC
Disaggregation of Revenue [Line Items]
Revenue from contracts	1,485	1,700
Other	27	17
Total	1,512	1,717
Electric
Disaggregation of Revenue [Line Items]
Revenue from contracts	1,052	958
Other	(3)	(6)
Total	1,049	952
Natural Gas
Disaggregation of Revenue [Line Items]
Revenue from contracts	1,541	1,752
Other	29	23
Total	1,570	1,775
Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue from contracts	1	51
Other	0	1
Total	$ 1	$ 52

Revenue Recognition and Allow_4

Revenue Recognition and Allowance for Credit Losses - Schedule of Contract Assets and Liabilities (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Accounts Receivable
Opening balance as of December 31, 2023	$ 652
Closing balance as of March 31, 2024	656
Increase (decrease) in accounts receivable	4
Other Accrued Unbilled Revenues
Opening balance as of December 31, 2023	516
Closing balance as of March 31, 2024	392
Increase (decrease) in other accrued unbilled revenues	(124)
Contract Liabilities
Opening balance as of December 31, 2023	2
Closing balance as of March 31, 2024	3
Increase (decrease) in contract liabilities	1
Revenue recognized included in the opening contract liability for the period	1
Houston Electric
Accounts Receivable
Opening balance as of December 31, 2023	275
Closing balance as of March 31, 2024	250
Increase (decrease) in accounts receivable	(25)
Other Accrued Unbilled Revenues
Opening balance as of December 31, 2023	142
Closing balance as of March 31, 2024	122
Increase (decrease) in other accrued unbilled revenues	(20)
Contract Liabilities
Opening balance as of December 31, 2023	2
Closing balance as of March 31, 2024	3
Increase (decrease) in contract liabilities	1
Revenue recognized included in the opening contract liability for the period	1
CERC
Accounts Receivable
Opening balance as of December 31, 2023	330
Closing balance as of March 31, 2024	355
Increase (decrease) in accounts receivable	25
Other Accrued Unbilled Revenues
Opening balance as of December 31, 2023	329
Closing balance as of March 31, 2024	233
Increase (decrease) in other accrued unbilled revenues	$ (96)

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended
Employee Benefit Plans (Details) - USD ($) $ in Millions	Mar. 31, 2024	Mar. 31, 2023
Pension plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6	$ 6
Interest cost	19	19
Expected return on plan assets	(19)	(19)
Amortization of net loss	7	7
Settlement cost (benefit)	0	1
Net periodic cost (benefit)	13	14
Total contributions expected in current year	9
Total contributions to the plans during the period	2
Pension plans \| Houston Electric
Defined Benefit Plan Disclosure [Line Items]
Total contributions expected in current year	0
Total contributions to the plans during the period	0
Pension plans \| CERC
Defined Benefit Plan Disclosure [Line Items]
Total contributions expected in current year	0
Total contributions to the plans during the period	0
Postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Interest cost	3	3
Expected return on plan assets	(1)	(1)
Amortization of prior service cost (credit)	(1)	0
Amortization of net loss	(2)	(2)
Net periodic cost (benefit)	(1)	0
Total contributions expected in current year	8
Total contributions to the plans during the period	2
Postretirement benefit plans \| Houston Electric
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1	1
Expected return on plan assets	(1)	(1)
Amortization of prior service cost (credit)	(1)	(1)
Amortization of net loss	(1)	(1)
Net periodic cost (benefit)	(2)	(2)
Total contributions expected in current year	1
Total contributions to the plans during the period	0
Postretirement benefit plans \| CERC
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1	1
Expected return on plan assets	0	0
Amortization of prior service cost (credit)	1	1
Amortization of net loss	(1)	(1)
Net periodic cost (benefit)	1	$ 1
Total contributions expected in current year	4
Total contributions to the plans during the period	$ 1

Regulatory Matters - Schedule o

Regulatory Matters - Schedule of Allowed Equity Return Recognized (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Public Utilities, General Disclosures [Line Items]
Unrecognized equity return	$ 204		$ 204
Allowed equity return recognized	9	$ 8
Houston Electric
Public Utilities, General Disclosures [Line Items]
Unrecognized equity return	69		75
Allowed equity return recognized	8	7
CERC
Public Utilities, General Disclosures [Line Items]
Unrecognized equity return	73		$ 69
Allowed equity return recognized	$ 1	$ 1

Regulatory Matters - Narrative

Regulatory Matters - Narrative (Details) $ in Millions				12 Months Ended
Regulatory Matters - Narrative (Details) $ in Millions	Oct. 12, 2023 USD ($)	Apr. 05, 2023 USD ($)	Mar. 23, 2023 USD ($)	Dec. 31, 2021 lease	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 29, 2023 USD ($)	Jan. 04, 2023 USD ($)	Jul. 01, 2022 USD ($)
Regulatory Assets [Line Items]
Regulatory assets current					$ 294	$ 161
Regulatory assets noncurrent					2,428	2,513
Public Utility Commission of Texas
Regulatory Assets [Line Items]
Regulatory assets					8	8
IURC
Regulatory Assets [Line Items]
Regulatory asset, issued								$ 350
CERC
Regulatory Assets [Line Items]
Regulatory assets current					291	161
Regulatory assets noncurrent					790	850
Houston Electric
Regulatory Assets [Line Items]
Regulatory assets noncurrent					725	752
Number of leases entered into \| lease				2
Houston Electric \| Public Utility Commission of Texas
Regulatory Assets [Line Items]
Regulatory assets					8	8
Houston Electric \| Public Utility Commission Of Texas \| TEEEF Lease One
Regulatory Assets [Line Items]
Recovery of deferred costs sought									$ 200
Regulatory asset, revenue requirement amount		$ 39
Regulatory asset, amortization period		82 months 15 days
Houston Electric \| Public Utility Commission Of Texas \| TEEEF Lease Two
Regulatory Assets [Line Items]
Regulatory asset, amortization period	102 months	78 months
Regulatory asset, annual revenue requirement amount		$ 188
Regulatory asset, lease, incremental revenue requirement increase		$ 149
Regulatory asset, revenue requirement amount reduction	$ 35
SIGECO \| Subsidiaries
Regulatory Assets [Line Items]
Regulatory asset, issued							$ 341
February 2021 Winter Storm
Regulatory Assets [Line Items]
Regulatory assets current					69
February 2021 Winter Storm \| Operation and maintenance expense
Regulatory Assets [Line Items]
Regulatory assets					18	17
February 2021 Winter Storm \| CERC
Regulatory Assets [Line Items]
Regulatory assets current					69
Regulatory assets noncurrent					104
February 2021 Winter Storm \| Houston Electric \| Operation and maintenance expense
Regulatory Assets [Line Items]
Regulatory assets					18	17
February 2021 Winter Storm Event
Regulatory Assets [Line Items]
Regulatory asset, approximate total gas cost					2,000
Regulatory assets current						86
Regulatory assets noncurrent					$ 104	130
February 2021 Winter Storm Event \| CERC
Regulatory Assets [Line Items]
Regulatory assets current						86
Regulatory assets noncurrent						$ 130
February 2021 Winter Storm Event \| Customer Rate Relief Bond Financing
Regulatory Assets [Line Items]
Cash proceeds received from government grants			$ 1,100
February 2021 Winter Storm Event \| Customer Rate Relief Bond Financing \| CERC
Regulatory Assets [Line Items]
Cash proceeds received from government grants			$ 1,100

Derivative Instruments - Intere

Derivative Instruments - Interest Rate Hedging and Weather Hedges (Details) - Interest rate derivatives - Cash Flow Hedge - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Economic hedge	$ 150	$ 200
Houston Electric
Derivative [Line Items]
Economic hedge	$ 0	$ 100

Derivative Instruments - Schedu

Derivative Instruments - Schedule of Derivative Activity (Details) $ in Millions			3 Months Ended
	Mar. 31, 2024 USD ($) MMBTU	Dec. 31, 2023 USD ($) MMBTU	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Liability	$ 532	$ 617	$ 532
Derivative assets	3	0	3
Derivative, Credit Risk Related Contingent Features [Abstract]
Aggregate fair value of derivatives containing material adverse change provisions in a net liability position	9	9	9
Fair value of collateral already posted	0	0	0
Additional collateral required to be posted if credit risk contingent features triggered	9	9	9
CERC
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Liability	10	11	10
Derivative assets	0	0	0
Derivative, Credit Risk Related Contingent Features [Abstract]
Aggregate fair value of derivatives containing material adverse change provisions in a net liability position	8	8	8
Fair value of collateral already posted	0	0	0
Additional collateral required to be posted if credit risk contingent features triggered	$ 8	$ 8	8
Indexed debt securities derivative \| Gains (Losses) in Other Income (Expense)
Income Statement Impact of Derivative Activity [Abstract]
Gain (loss) on derivative instruments not designated as hedging instruments			85	$ (39)
Energy Related Derivative \| Derivatives not designated as hedging instruments:
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative gross volume (in MMBtu) \| MMBTU	20,712	27,421
Energy Related Derivative \| Derivatives not designated as hedging instruments: \| CERC
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative gross volume (in MMBtu) \| MMBTU	17,753	23,504
Current Assets: Non-trading derivative assets \| Interest rate derivatives \| Derivatives designated as cash flow hedges: \| Cash Flow Hedge
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value	$ 3	$ 0	3
Derivative Liabilities Fair Value	0	0	0
Current Liabilities \| Indexed debt securities derivative \| Derivatives not designated as hedging instruments:
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value	0	0	0
Derivative Liabilities Fair Value	520	605	520
Current Liabilities \| Energy Related Derivative \| Derivatives not designated as hedging instruments:
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value	0	0	0
Derivative Liabilities Fair Value	9	9	9
Current Liabilities \| Energy Related Derivative \| Derivatives not designated as hedging instruments: \| CERC
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value	0	0	0
Derivative Liabilities Fair Value	8	8	8
Other Liabilities: Non-trading derivative liabilities \| Energy Related Derivative \| Derivatives not designated as hedging instruments:
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value	0	0	0
Derivative Liabilities Fair Value	3	3	3
Other Liabilities: Non-trading derivative liabilities \| Energy Related Derivative \| Derivatives not designated as hedging instruments: \| CERC
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value	0	0	0
Derivative Liabilities Fair Value	$ 2	$ 3	$ 2

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Assets and Liabilities Measured On Recurring Basis (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Liabilities
Derivative Liability	$ 532	$ 617
CERC
Liabilities
Derivative Liability	10	11
Fair Value, Recurring
Assets
Equity securities	458	541
Investments, including money market funds	37	31
Interest rate derivatives	3	0
Total assets	498	572
Liabilities
Total liabilities	532	617
Fair Value, Recurring \| Houston Electric
Assets
Investments, including money market funds	21	14
Total assets	21	14
Fair Value, Recurring \| CERC
Assets
Investments, including money market funds	15	15
Total assets	15	15
Liabilities
Total liabilities	10	11
Fair Value, Recurring \| Indexed debt securities derivative
Liabilities
Derivative Liability	520	605
Fair Value, Recurring \| Energy Related Derivative
Liabilities
Derivative Liability	12	12
Fair Value, Recurring \| Energy Related Derivative \| CERC
Liabilities
Derivative Liability	10	11
Level 1 \| Fair Value, Recurring
Assets
Equity securities	458	541
Investments, including money market funds	37	31
Interest rate derivatives	0	0
Total assets	495	572
Liabilities
Total liabilities	0	0
Level 1 \| Fair Value, Recurring \| Houston Electric
Assets
Investments, including money market funds	21	14
Total assets	21	14
Level 1 \| Fair Value, Recurring \| CERC
Assets
Investments, including money market funds	15	15
Total assets	15	15
Liabilities
Total liabilities	0	0
Level 1 \| Fair Value, Recurring \| Indexed debt securities derivative
Liabilities
Derivative Liability	0	0
Level 1 \| Fair Value, Recurring \| Energy Related Derivative
Liabilities
Derivative Liability	0	0
Level 1 \| Fair Value, Recurring \| Energy Related Derivative \| CERC
Liabilities
Derivative Liability	0	0
Level 2 \| Fair Value, Recurring
Assets
Equity securities	0	0
Investments, including money market funds	0	0
Interest rate derivatives	3	0
Total assets	3	0
Liabilities
Total liabilities	532	617
Level 2 \| Fair Value, Recurring \| Houston Electric
Assets
Investments, including money market funds	0	0
Total assets	0	0
Level 2 \| Fair Value, Recurring \| CERC
Assets
Investments, including money market funds	0	0
Total assets	0	0
Liabilities
Total liabilities	10	11
Level 2 \| Fair Value, Recurring \| Indexed debt securities derivative
Liabilities
Derivative Liability	520	605
Level 2 \| Fair Value, Recurring \| Energy Related Derivative
Liabilities
Derivative Liability	12	12
Level 2 \| Fair Value, Recurring \| Energy Related Derivative \| CERC
Liabilities
Derivative Liability	10	11
Level 3 \| Fair Value, Recurring
Assets
Equity securities	0	0
Investments, including money market funds	0	0
Interest rate derivatives	0	0
Total assets	0	0
Liabilities
Total liabilities	0	0
Level 3 \| Fair Value, Recurring \| Houston Electric
Assets
Investments, including money market funds	0	0
Total assets	0	0
Level 3 \| Fair Value, Recurring \| CERC
Assets
Investments, including money market funds	0	0
Total assets	0	0
Liabilities
Total liabilities	0	0
Level 3 \| Fair Value, Recurring \| Indexed debt securities derivative
Liabilities
Derivative Liability	0	0
Level 3 \| Fair Value, Recurring \| Energy Related Derivative
Liabilities
Derivative Liability	0	0
Level 3 \| Fair Value, Recurring \| Energy Related Derivative \| CERC
Liabilities
Derivative Liability	$ 0	$ 0

Fair Value Measurements - Sch_2

Fair Value Measurements - Schedule of Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Carrying amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	$ 19,145	$ 18,609
Carrying amount \| Houston Electric
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	7,984	7,587
Carrying amount \| CERC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	4,719	4,670
Fair value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	18,020	17,804
Fair value \| Houston Electric
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	7,115	6,917
Fair value \| CERC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	$ 4,599	$ 4,627

Goodwill (CenterPoint Energy _3

Goodwill (CenterPoint Energy and CERC) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 4,160
Held For Sale	217
Goodwill, ending balance	3,943
CERC
Goodwill [Roll Forward]
Goodwill, beginning balance	1,583
Held For Sale	122
Goodwill, ending balance	1,461
Electric
Goodwill [Roll Forward]
Goodwill, beginning balance	936
Held For Sale	0
Goodwill, ending balance	936
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Accumulated goodwill impairment charge		$ 185
Natural Gas
Goodwill [Roll Forward]
Goodwill, beginning balance	2,920
Held For Sale	217
Goodwill, ending balance	2,703
Corporate and Other
Goodwill [Roll Forward]
Goodwill, beginning balance	304
Held For Sale	0
Goodwill, ending balance	$ 304

Equity Securities and Indexed_3

Equity Securities and Indexed Debt Securities (ZENS) (CenterPoint Energy) - Schedule of Gain (Loss) On Equity Securities (CenterPoint Energy) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Debt and Equity Securities, FV-NI [Line Items]
Gain (loss) on equity securities	$ (83)	$ 38
AT&T Common
Debt and Equity Securities, FV-NI [Line Items]
Gain (loss) on equity securities	9	9
Charter Common
Debt and Equity Securities, FV-NI [Line Items]
Gain (loss) on equity securities	(85)	16
WBD Common
Debt and Equity Securities, FV-NI [Line Items]
Gain (loss) on equity securities	(7)	14
Other
Debt and Equity Securities, FV-NI [Line Items]
Gain (loss) on equity securities	$ 0	$ (1)

Equity Securities and Indexed_4

Equity Securities and Indexed Debt Securities (ZENS) (CenterPoint Energy) - Narrative (Details) - Subordinated Debt, ZENS, Due 2029 - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Sep. 30, 1999
Debt and Equity Securities, FV-NI [Line Items]
Outstanding debt balance	$ 828
Debt instrument, face amount		$ 1,000
Subordinated note cash exchangeable percentage of fair value (as a percent)	95%
ZENS annual interest rate (as a percent)	2%
Target annual yield on reference shares (as a percent)	2.309%
Contingent principal amount of ZENS	$ 15

Equity Securities and Indexed_5

Equity Securities and Indexed Debt Securities (ZENS) (CenterPoint Energy) - Schedule of Securities Classified as Trading (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt and Equity Securities, FV-NI [Line Items]
Carrying Value	$ 458	$ 541
AT&T Common
Debt and Equity Securities, FV-NI [Line Items]
Balance of investment owned (in shares)	10,212,945	10,212,945
Carrying Value	$ 180	$ 171
Charter Common
Debt and Equity Securities, FV-NI [Line Items]
Balance of investment owned (in shares)	872,503	872,503
Carrying Value	$ 254	$ 339
WBD Common
Debt and Equity Securities, FV-NI [Line Items]
Balance of investment owned (in shares)	2,470,685	2,470,685
Carrying Value	$ 21	$ 28
Other
Debt and Equity Securities, FV-NI [Line Items]
Carrying Value	$ 3	$ 3

Equity Securities and Indexed_6

Equity Securities and Indexed Debt Securities (ZENS) (CenterPoint Energy) - Schedule of Reference Shares (Details) - Subordinated Debt, ZENS, Due 2029 - shares	Mar. 31, 2024	Dec. 31, 2023
AT&T Common
Debt and Equity Securities, FV-NI [Line Items]
Number of shares referenced in exchangeable subordinated note (in shares)	0.7185	0.7185
Charter Common
Debt and Equity Securities, FV-NI [Line Items]
Number of shares referenced in exchangeable subordinated note (in shares)	0.061382	0.061382
WBD Common
Debt and Equity Securities, FV-NI [Line Items]
Number of shares referenced in exchangeable subordinated note (in shares)	0.173817	0.173817

Short-term Borrowings and Lon_3

Short-term Borrowings and Long-term Debt - Narrative (Details) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended
	Aug. 01, 2023 $ / shares	Feb. 29, 2024 USD ($)	Mar. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Debt instrument, convertible, conversion ratio	27.1278
Conversion price percentage	25%
Maximum
Debt Instrument [Line Items]
Debt instrument, convertible, conversion ratio			33.9097
Debt instrument, convertible, number of equity instruments (in shares) \| shares			33,909,700
Convertible Debt
Debt Instrument [Line Items]
Debt instrument, convertible, conversion price (in dollar per shares) \| $ / shares	$ 36.86
Debt instrument, redemption price (as a percent)	100%
First Mortgage Bonds 3.50% Due 2024 \| SIGECO
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			3.50%
Debt instrument, redemption price, principal amount redeemed			$ 22
Debt instrument, redemption price, percentage of principal amount redeemed			100%
Houston Electric \| General Mortgage Bonds
Debt Instrument [Line Items]
Secured debt			$ 8,000
General mortgage bonds used as collateral			$ 68
Percentage of property additions			70%
Additional first mortgage bonds and general mortgage bonds that could be issued			$ 4,600
Percentage of property additions (as a percent)			70%
Houston Electric \| General Mortgage Bonds 5.15% Due 2034 \| General Mortgage Bonds
Debt Instrument [Line Items]
Debt instrument, face amount		$ 400
Debt instrument, interest rate, stated percentage		5.15%
Proceeds from issuance of long-term debt and capital securities, net		$ 395
SIGECO \| First Mortgage Bonds
Debt Instrument [Line Items]
Secured debt			$ 825
Additional first mortgage bonds and general mortgage bonds that could be issued			$ 966
Percentage of property additions (as a percent)			70%
Third Party AMAs
Debt Instrument [Line Items]
Inventory financings			$ 0	$ 4
Third Party AMAs \| CERC
Debt Instrument [Line Items]
Inventory financings			$ 0	$ 4

Short-term Borrowings and Lon_4

Short-term Borrowings and Long-term Debt - Schedule of Revolving Credit Facilities (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Debt Instrument [Line Items]
Aggregate principal amount	$ 4,000
SIGECO
Debt Instrument [Line Items]
Aggregate principal amount	250
Houston Electric
Debt Instrument [Line Items]
Aggregate principal amount	300
CERC
Debt Instrument [Line Items]
Aggregate principal amount	$ 1,050
Line of Credit \| Maximum
Debt Instrument [Line Items]
Percentage on limitation of debt to total capitalization under covenant amended (in hundredths) (as a percent)	70%
Line of Credit \| SIGECO
Debt Instrument [Line Items]
Ratio of indebtedness to net capital (as a percent)	0.650
Percentage on limitation of debt to total capitalization under covenant (as a percent)	46.70%
Line of Credit \| Houston Electric
Debt Instrument [Line Items]
Ratio of indebtedness to net capital (as a percent)	0.675
Percentage on limitation of debt to total capitalization under covenant (as a percent)	52.90%
Line of Credit \| Houston Electric \| Maximum
Debt Instrument [Line Items]
Percentage on limitation of debt to total capitalization under covenant amended (in hundredths) (as a percent)	70%
Line of Credit \| CERC
Debt Instrument [Line Items]
Ratio of indebtedness to net capital (as a percent)	0.650
Percentage on limitation of debt to total capitalization under covenant (as a percent)	39.90%
Line of Credit \| SOFR Plus \| SIGECO
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	1.125%
Line of Credit \| SOFR Plus \| Houston Electric
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	1.25%
Line of Credit \| SOFR Plus \| CERC
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	1.125%
Parent Company
Debt Instrument [Line Items]
Aggregate principal amount	$ 2,400
Parent Company \| Line of Credit
Debt Instrument [Line Items]
Ratio of indebtedness to net capital (as a percent)	0.650
Percentage on limitation of debt to total capitalization under covenant (as a percent)	59.60%
Restoration Cost Expected Cost	$ 100
Consecutive period for system restoration costs to exceed $100 million (in months)	12 months
Parent Company \| Line of Credit \| SOFR Plus
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	1.50%

Short-term Borrowings and Lon_5

Short-term Borrowings and Long-term Debt - Schedule of Utilization of Credit Facilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
CERC
Debt Instrument [Line Items]
Number of days until commercial paper maturity (in days)	30 days
Loans
Debt Instrument [Line Items]
Long-term line of credit	$ 0	$ 0
Loans \| CenterPoint Energy
Debt Instrument [Line Items]
Long-term line of credit	0	0
Loans \| SIGECO
Debt Instrument [Line Items]
Long-term line of credit	0	0
Loans \| Houston Electric
Debt Instrument [Line Items]
Long-term line of credit	0	0
Loans \| CERC
Debt Instrument [Line Items]
Long-term line of credit	0	0
Letters of Credit
Debt Instrument [Line Items]
Long-term line of credit	1	1
Letters of Credit \| CenterPoint Energy
Debt Instrument [Line Items]
Long-term line of credit	0	0
Letters of Credit \| SIGECO
Debt Instrument [Line Items]
Long-term line of credit	0	0
Letters of Credit \| Houston Electric
Debt Instrument [Line Items]
Long-term line of credit	0	0
Letters of Credit \| CERC
Debt Instrument [Line Items]
Long-term line of credit	1	1
Commercial Paper
Debt Instrument [Line Items]
Long-term line of credit	1,677	1,520
Commercial Paper \| CenterPoint Energy
Debt Instrument [Line Items]
Long-term line of credit	$ 1,145	$ 1,036
Weighted Average Interest Rate	5.49%	5.54%
Number of days until commercial paper maturity (in days)	60 days
Commercial Paper \| SIGECO
Debt Instrument [Line Items]
Long-term line of credit	$ 0	$ 0
Weighted Average Interest Rate	0%	0%
Commercial Paper \| Houston Electric
Debt Instrument [Line Items]
Long-term line of credit	$ 0	$ 0
Weighted Average Interest Rate	0%	0%
Commercial Paper \| CERC
Debt Instrument [Line Items]
Long-term line of credit	$ 532	$ 484
Weighted Average Interest Rate	5.47%	5.53%

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Mar. 31, 2024	Mar. 31, 2023
Income Tax Contingency [Line Items]
Effective income tax rate (as a percent)	18%	19%
Deferred remeasurement benefit	$ 25
Interest and penalties on uncertain tax liability	30
Change in valuation allowance, income tax benefit	21
Increase in unrecognized tax benefits is reasonably possible as a result of a lapse in statutes	$ 3
Houston Electric
Income Tax Contingency [Line Items]
Effective income tax rate (as a percent)	20%	23%
CERC
Income Tax Contingency [Line Items]
Effective income tax rate (as a percent)	19%	22%
Deferred remeasurement benefit	$ 24
Change in valuation allowance, income tax benefit	$ 21

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details)		3 Months Ended
Commitments and Contingencies - Narrative (Details)	Feb. 01, 2023 MW	Mar. 31, 2024 USD ($) lawsuit ashPond insurer gasManufacturingAndStorageSite formerAffiliate Defendant	Feb. 07, 2024 USD ($)	Nov. 19, 2023 lawsuit	Feb. 28, 2023 lawsuit class	Jan. 11, 2023 MW
Long-Term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted \| $		$ 489,000,000
Guarantor obligations, additional guarantee In relation to maximum exposure \| $		$ 0
Number of owned coal ash ponds \| ashPond		3
F.B. Culley
Long-Term Purchase Commitment [Line Items]
Number of owned coal ash ponds \| ashPond		2
A.B. Brown
Long-Term Purchase Commitment [Line Items]
Number of owned coal ash ponds \| ashPond		1
F.B. Culley East
Long-Term Purchase Commitment [Line Items]
Number of owned coal ash ponds \| ashPond		1
Accounting and ratemaking project relief, approved capital costs \| $			$ 52,000,000
Accounting and ratemaking project relief, approved annual O & M expenses \| $			$ 133,000
Indiana Gas Service Territory
Long-Term Purchase Commitment [Line Items]
Environmental remediation number of sites with potential remedial responsibility \| gasManufacturingAndStorageSite		26
Environmental remediation investigation studies agreed upon number of sites \| gasManufacturingAndStorageSite		1
SIGECO
Long-Term Purchase Commitment [Line Items]
Environmental remediation number of sites with potential remedial responsibility \| gasManufacturingAndStorageSite		5
Minnesota and Indiana
Long-Term Purchase Commitment [Line Items]
Environmental remediation, number of sites sites owned or operated by bormer affiliate \| formerAffiliate		1
Loss from Catastrophes
Long-Term Purchase Commitment [Line Items]
Pending lawsuits					12
Loss from Catastrophes \| Harris County
Long-Term Purchase Commitment [Line Items]
Pending lawsuits					9
Uninsured Risk
Long-Term Purchase Commitment [Line Items]
Loss contingency, number of insurers \| insurer		1
CERC \| Indiana Gas Service Territory
Long-Term Purchase Commitment [Line Items]
Environmental remediation number of sites with potential remedial responsibility \| gasManufacturingAndStorageSite		26
Indiana Electric
Long-Term Purchase Commitment [Line Items]
Asset retirement obligation \| $		$ 117,000,000
Indiana Electric \| Minimum
Long-Term Purchase Commitment [Line Items]
Estimated capital expenditure to clean ash ponds \| $		60,000,000
Indiana Electric \| Maximum
Long-Term Purchase Commitment [Line Items]
Estimated capital expenditure to clean ash ponds \| $		$ 80,000,000
Litigation Related to the February 2021 Winter Storm Event \| Pending Litigation
Long-Term Purchase Commitment [Line Items]
Pending lawsuits		220
February 2021 Winter Storm Event \| Pending Litigation \| CenterPoint Energy, Houston Electric and Other Entities
Long-Term Purchase Commitment [Line Items]
Loss contingency, pending claims, number of lawsuits named as defendant		155
Multi District Litigation \| February 2021 Putative Class Action
Long-Term Purchase Commitment [Line Items]
Pending lawsuits		1
Multi District Litigation \| February 2021 Putative Class Action \| Utility Holding, LLC
Long-Term Purchase Commitment [Line Items]
Pending lawsuits		1
Multi District Litigation \| Cases Transferred to the Multi District Litigation (MDL)
Long-Term Purchase Commitment [Line Items]
Pending lawsuits		3		9
Bellwether Cases \| Pending Litigation
Long-Term Purchase Commitment [Line Items]
Pending lawsuits		5
Harris County vs. CERC - Putative \| Loss from Catastrophes
Long-Term Purchase Commitment [Line Items]
Pending lawsuits					1
Number of classes of electric and natural gas customers \| class					2
Other Texas Lawsuits Brought By Assignee vs. Company \| Loss from Catastrophes
Long-Term Purchase Commitment [Line Items]
Pending lawsuits					2
Other Texas Lawsuits Brought By Assignee vs. Company \| Loss from Catastrophes \| Harris County
Long-Term Purchase Commitment [Line Items]
Pending lawsuits					1
Other Texas Lawsuits Brought By Assignee vs. Company \| Loss from Catastrophes \| Tom Green County
Long-Term Purchase Commitment [Line Items]
Pending lawsuits					1
Jefferson Parish and the State of Louisiana Under the SCLRMA \| Pending Litigation
Long-Term Purchase Commitment [Line Items]
Pending lawsuits		42
Jefferson Parish and the State of Louisiana Under the SCLRMA \| Suits Remanded to Louisiana Federal Couts
Long-Term Purchase Commitment [Line Items]
Pending lawsuits		42
Jefferson Parish \| Pending Litigation \| Predecessor Company, Primary Fuels, Inc.
Long-Term Purchase Commitment [Line Items]
Loss contingency, pending claims, number of lawsuits named as defendant \| Defendant		1
Loss contingency, number of defendants		1
Posey Solar
Long-Term Purchase Commitment [Line Items]
Solar array generating capacity (in MW) \| MW	191
Solar array assets, useful life	35 years
Pike Solar
Long-Term Purchase Commitment [Line Items]
Solar array generating capacity (in MW) \| MW						130

Commitments and Contingencies_2

Commitments and Contingencies - Schedule of Undiscounted Minimum Purchase Obligations (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Natural Gas Supply
Other Commitments [Line Items]
Remaining nine months of 2024	$ 427
2025	596
2026	536
2027	466
2028	399
2029	386
2030 and beyond	1,392
Electric Supply
Other Commitments [Line Items]
Remaining nine months of 2024	117
2025	461
2026	113
2027	105
2028	68
2029	66
2030 and beyond	696
Other
Other Commitments [Line Items]
Remaining nine months of 2024	117
2025	59
2026	61
2027	17
2028	12
2029	1
2030 and beyond	$ 306
Other \| Capital Addition Purchase Commitments \| Minimum
Other Commitments [Line Items]
Undiscounted minimum payment obligation, term	15 years
Other \| Capital Addition Purchase Commitments \| Maximum
Other Commitments [Line Items]
Undiscounted minimum payment obligation, term	25 years
Natural Gas Supply \| CERC
Other Commitments [Line Items]
Remaining nine months of 2024	$ 423
2025	592
2026	532
2027	462
2028	395
2029	382
2030 and beyond	$ 1,373

Commitments and Contingencies_3

Commitments and Contingencies - Schedule of Estimated Accrued Costs (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Minnesota and Indiana Gas Service Territories
Loss Contingencies [Line Items]
Liability recorded for environmental loss contingencies	$ 13
Minnesota and Indiana Gas Service Territories \| Minimum
Loss Contingencies [Line Items]
Estimated remediation costs	$ 8
Years to resolve contingency	5 years
Minnesota and Indiana Gas Service Territories \| Maximum
Loss Contingencies [Line Items]
Estimated remediation costs	$ 47
Years to resolve contingency	50 years
Minnesota Service Territory \| CERC
Loss Contingencies [Line Items]
Liability recorded for environmental loss contingencies	$ 11
Minnesota Service Territory \| CERC \| Minimum
Loss Contingencies [Line Items]
Estimated remediation costs	$ 7
Years to resolve contingency	5 years
Minnesota Service Territory \| CERC \| Maximum
Loss Contingencies [Line Items]
Estimated remediation costs	$ 40
Years to resolve contingency	50 years

Earnings Per Share (CenterPoi_3

Earnings Per Share (CenterPoint Energy) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator:
Net income	$ 350	$ 325
Less: Preferred stock dividend requirement (Note 18)	0	12
Income available to common shareholders - basic	350	313
Income available to common shareholders -diluted	$ 350	$ 313
Denominator:
Weighted average common shares outstanding - basic (in shares)	632,228	630,309
Plus: Incremental shares from assumed conversions:
Weighted average common shares outstanding - diluted (in shares)	633,970	633,051
Earnings Per Common Share:
Basic Earnings Per Common Share (in dollars per share)	$ 0.55	$ 0.50
Diluted Earnings (Loss) Per Common Share
Diluted Earnings Per Common Share (in dollars per share)	$ 0.55	$ 0.49
Restricted stock
Plus: Incremental shares from assumed conversions:
Restricted stock (in shares)	1,742	2,742

Reportable Segments (Details)

Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended
Reportable Segments (Details) - USD ($) $ in Millions	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 2,620	$ 2,779
Net income	350	325
Total Assets	40,199		$ 39,715
Natural Gas
Segment Reporting Information [Line Items]
Revenues	1,570	1,775
Corporate and Other
Segment Reporting Information [Line Items]
Revenues	1	52
Corporate and Other \| Pension and Other Postretirement Plans Costs
Segment Reporting Information [Line Items]
Regulatory assets	379		385
Operating Segments \| Electric
Segment Reporting Information [Line Items]
Revenues	1,049	952
Net income	121	123
Total Assets	21,688		21,089
Operating Segments \| Natural Gas
Segment Reporting Information [Line Items]
Revenues	1,570	1,775
Net income	283	234
Total Assets	17,611		17,429
Operating Segments \| Corporate and Other
Segment Reporting Information [Line Items]
Revenues	1	52
Net income	(54)	$ (32)
Total Assets	$ 900		$ 1,197

Supplemental Disclosure of Ca_3

Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Condensed Financial Statements, Captions [Line Items]
Interest, net of capitalized interest	$ 228	$ 191
Income tax refunds, net	(12)	(1)
Accounts payable related to capital expenditures	195	270
ROU assets obtained in exchange for lease liabilities	0	1
Cash and cash equivalents	$ 161		$ 90
Restricted Cash and Cash Equivalents, Statement of Financial Position [Extensible Enumeration]	Prepaid expenses and other current assets		Prepaid expenses and other current assets
Restricted cash included in Prepaid expenses and other current assets (2)	$ 18		$ 19
Total cash, cash equivalents and restricted cash shown in Condensed Statements of Consolidated Cash Flows	179	130	109	$ 91
Bond Companies and Securitization Bond Company
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	132		90
Houston Electric
Condensed Financial Statements, Captions [Line Items]
Interest, net of capitalized interest	59	78
Income tax refunds, net	0	0
Accounts payable related to capital expenditures	149	178
ROU assets obtained in exchange for lease liabilities	0	1
Cash and cash equivalents	109		76
Restricted cash included in Prepaid expenses and other current assets (2)	13		13
Total cash, cash equivalents and restricted cash shown in Condensed Statements of Consolidated Cash Flows	122	124	89	88
Houston Electric \| Other Current Liabilities
Condensed Financial Statements, Captions [Line Items]
Contributions in aid of construction	50		47
Houston Electric \| Bond Companies
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	109		76
CERC
Condensed Financial Statements, Captions [Line Items]
Interest, net of capitalized interest	76	58
Income tax refunds, net	0	0
Accounts payable related to capital expenditures	59	85
ROU assets obtained in exchange for lease liabilities	0	0
Cash and cash equivalents	17		1
Restricted cash included in Prepaid expenses and other current assets (2)	0		0
Total cash, cash equivalents and restricted cash shown in Condensed Statements of Consolidated Cash Flows	17	$ 1	1	$ 0
CERC \| Credits Related to Customers on Budget Billing Programs
Condensed Financial Statements, Captions [Line Items]
Contract with customer, liability, current, budget billing programs	$ 65		$ 118

Related Party Transactions (H_3

Related Party Transactions (Houston Electric and CERC) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Houston Electric
Related Party Transaction [Line Items]
Money pool investments (borrowings)	$ 573		$ 238
Cash dividends paid to parent	36	$ 51
Houston Electric \| Additional Paid-in-Capital
Related Party Transaction [Line Items]
Contribution from parent	230	650
Houston Electric \| Operation and maintenance expense
Related Party Transaction [Line Items]
Net affiliate service charges (billings)	(1)	(3)
Houston Electric \| Operation and maintenance expense \| CenterPoint Energy
Related Party Transaction [Line Items]
Corporate service charges	$ 35	35
Houston Electric \| Investments
Related Party Transaction [Line Items]
Weighted average interest rate	5.55%		5.59%
CERC
Related Party Transaction [Line Items]
Money pool investments (borrowings)	$ 0		$ 1
Cash dividends paid to parent	115	204
CERC \| Additional Paid-in-Capital
Related Party Transaction [Line Items]
Contribution from parent	0	0
CERC \| Operation and maintenance expense
Related Party Transaction [Line Items]
Net affiliate service charges (billings)	1	3
CERC \| Operation and maintenance expense \| CenterPoint Energy
Related Party Transaction [Line Items]
Corporate service charges	$ 51	$ 50
CERC \| Investments
Related Party Transaction [Line Items]
Weighted average interest rate	0%		5.59%

Equity (Details)

Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Preferred Stock Dividends and Other Adjustments [Abstract]
Preferred stock dividend requirement	$ 0	$ 12
Total income allocated to preferred shareholders	0	12
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(35)	(31)
Net deferred gain from cash flow hedges	3	0
Prior service cost	0	(1)
Actuarial losses	1	0
Other comprehensive income (loss)	2	(1)
Ending Balance	(33)	(32)
CERC
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	16	16
Net deferred gain from cash flow hedges	0	0
Prior service cost	0	(1)
Actuarial losses	(1)	0
Other comprehensive income (loss)	(1)	(1)
Ending Balance	15	15
Other Pension, Postretirement and Supplemental Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Remeasurement of pension and other postretirement plans	(2)	0
Other Pension, Postretirement and Supplemental Plans \| CERC
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Remeasurement of pension and other postretirement plans	$ 0	$ 0
Common Stock
Class of Stock [Line Items]
Common stock, dividends declared per share (in dollars per share)	$ 0	$ 0
Common Stock dividends paid per share (in dollars per share)	0.200	0.190
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, dividends declared (in dollars per share)	0	0
Preferred stock dividends paid per share (in dollars per share)	$ 0	$ 30.625
Preferred Stock Dividends and Other Adjustments [Abstract]
Preferred stock dividend requirement	$ 0	$ 12

Equity - Narrative (Details)

Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended	3 Months Ended
	Jan. 10, 2024	Sep. 01, 2023	Apr. 30, 2024	Mar. 31, 2024
At The Market Member
Class of Stock [Line Items]
Issuances of common stock (in shares)				133,405
Sale of Stock, Capacity Available Under Program				$ 496
Cash proceeds				3
Payments of Stock Issuance Costs				$ 1
At The Market Member \| Subsequent Event
Class of Stock [Line Items]
Sale of Stock, Capacity Available Under Program			$ 313
Cash proceeds			182
Payments of Stock Issuance Costs			$ 2
Series A Preferred Stock
Class of Stock [Line Items]
Redemption of Series A Preferred Stock (in shares)		800,000
Preferred stock redemption price (per share)		$ 1,000
Maximum \| Common Stock \| At The Market Member
Class of Stock [Line Items]
Sale of stock, consideration expected to be received on transaction	$ 500

Leases (Details)

Leases (Details) $ in Millions	3 Months Ended
Leases (Details) $ in Millions	Mar. 31, 2024 USD ($) MW	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Lease, Cost [Abstract]
Operating lease cost	$ 1	$ 2
Short-term lease cost	2	0
Total lease cost	3	2
Operating Leases, Lease Income [Abstract]
Operating lease income	2	2
Total lease income	2	2
Assets and Liabilities, Lessee [Abstract]
Operating ROU assets	12		$ 13
Finance ROU assets	502		526
Total leased assets	514		539
Current operating lease liability	3		3
Non-current operating lease liability	9		10
Total leased liabilities	$ 12		$ 13
Weighted-average remaining lease term (in years) - operating leases	4 years 6 months		4 years 8 months 12 days
Weighted-average discount rate - operating leases	4.15%		4.13%
Weighted-average remaining lease term (in years) - finance leases	5 years 3 months 18 days		5 years 6 months
Weighted-average discount rate - finance leases (as a percent)	3.60%		3.60%
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other non-current assets		Other non-current assets
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net		Property, Plant and Equipment, Net
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities		Other current liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other non-current liabilities		Other non-current liabilities
Operating Lease Liabilities, Payments Due [Abstract]
Remainder of 2024	$ 3
2025	3
2026	3
2027	2
2028	1
2029	1
2030 and beyond	1
Total lease payments	14
Less: Interest	2
Present value of lease liabilities	12		$ 13
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract]
Remainder of 2024	5
2025	7
2026	7
2027	7
2028	7
2029	7
2030 and beyond	166
Total lease payments to be received	206
Other Information Related to Leases [Abstract]
Operating cash flows from operating leases included in the measurement of lease liabilities	1	2
Financing cash flows from finance leases included in the measurement of lease liabilities	0	0
Houston Electric
Lease Disclosure [Line Items]
Expenses associated with short-term lease	$ 98		100
Number of megawatts of mobile generation \| MW	505
Escrow deposit	$ 92
Expenses associated with long term lease	$ 131		124
Right to terminate, lease costs refunded (as a percent)	75%
Lease, Cost [Abstract]
Operating lease cost	$ 1	1
Short-term lease cost		(1)
Short-term lease cost	2
Total lease cost	3	0
Operating Leases, Lease Income [Abstract]
Operating lease income	0	0
Total lease income	0	0
Assets and Liabilities, Lessee [Abstract]
Operating ROU assets	5		6
Finance ROU assets	502		526
Total leased assets	507		532
Current operating lease liability	1		1
Non-current operating lease liability	4		5
Total leased liabilities	$ 5		$ 6
Weighted-average remaining lease term (in years) - operating leases	3 years 7 months 6 days		3 years 10 months 24 days
Weighted-average discount rate - operating leases	4.09%		4.09%
Weighted-average remaining lease term (in years) - finance leases	5 years 3 months 18 days		5 years 6 months
Weighted-average discount rate - finance leases (as a percent)	3.60%		3.60%
Operating Lease Liabilities, Payments Due [Abstract]
Remainder of 2024	$ 2
2025	2
2026	1
2027	1
2028	0
2029	0
2030 and beyond	0
Total lease payments	6
Less: Interest	1
Present value of lease liabilities	5		$ 6
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract]
Remainder of 2024	0
2025	1
2026	0
2027	0
2028	0
2029	0
2030 and beyond	0
Total lease payments to be received	1
Other Information Related to Leases [Abstract]
Operating cash flows from operating leases included in the measurement of lease liabilities	0	0
Financing cash flows from finance leases included in the measurement of lease liabilities	0	0
CERC
Lease, Cost [Abstract]
Operating lease cost	0	0
Short-term lease cost	0	0
Total lease cost	0	0
Operating Leases, Lease Income [Abstract]
Operating lease income	1	1
Total lease income	1	1
Assets and Liabilities, Lessee [Abstract]
Operating ROU assets	4		4
Finance ROU assets	0		0
Total leased assets	4		4
Current operating lease liability	1		1
Non-current operating lease liability	3		3
Total leased liabilities	$ 4		$ 4
Weighted-average remaining lease term (in years) - operating leases	2 years 10 months 24 days		3 years 1 month 6 days
Weighted-average discount rate - operating leases	3.62%		3.60%
Weighted-average discount rate - finance leases (as a percent)	0%		0%
Operating Lease Liabilities, Payments Due [Abstract]
Remainder of 2024	$ 2
2025	1
2026	1
2027	0
2028	0
2029	0
2030 and beyond	0
Total lease payments	4
Less: Interest	0
Present value of lease liabilities	4		$ 4
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract]
Remainder of 2024	3
2025	5
2026	5
2027	5
2028	5
2029	6
2030 and beyond	164
Total lease payments to be received	193
Other Information Related to Leases [Abstract]
Operating cash flows from operating leases included in the measurement of lease liabilities	0	0
Financing cash flows from finance leases included in the measurement of lease liabilities	$ 0	$ 0

Subsequent Events (CenterPoin_2

Subsequent Events (CenterPoint Energy) (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended
	Apr. 26, 2024	Apr. 30, 2024	Mar. 31, 2024
Subsequent Event
Subsequent Event [Line Items]
Common stock, dividends declared per share (in dollars per share)	$ 0.2000
At The Market Member
Subsequent Event [Line Items]
Cash proceeds			$ 3
Payments of Stock Issuance Costs			1
Sale of Stock, Capacity Available Under Program			$ 496
At The Market Member \| Subsequent Event
Subsequent Event [Line Items]
Common stock issued (in shares)		6,525,300
Cash proceeds		$ 182
Payments of Stock Issuance Costs		2
Sale of Stock, Capacity Available Under Program		$ 313