STATEMENTS OF CONSOLIDATED CASH FLOWS - CERC - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash Flows from Operating Activities:
Net income (loss)	$ 917	$ 1,057	$ 1,486
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,401	1,288	1,316
Deferred income taxes	31	20	213
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	423	(461)	(98)
Inventory	167	(259)	(140)
Taxes receivable	(74)	(19)	81
Accounts payable	(302)	203	175
Net regulatory assets and liabilities	1,043	234	(2,295)
Other operating activities, net	60	79	85
Net cash provided by operating activities	3,877	1,810	22
Cash Flows from Investing Activities:
Capital expenditures	(4,401)	(4,419)	(3,164)
Proceeds from divestitures (Note 4)	144	2,075	22
Other investing activities, net	24	14	15
Net cash used in investing activities	(4,233)	(1,628)	(1,851)
Cash Flows from Financing Activities:
Increase (decrease) in short-term borrowings, net	(10)	452	(27)
Proceeds from (payments of) commercial paper, net	(1,055)	(74)	1,132
Proceeds from long-term debt and term loans	6,044	2,089	4,493
Payments of long-term debt and term loans, including make-whole premiums	(3,190)	(1,795)	(2,968)
Other financing activities, net	(25)	(7)	(5)
Net cash provided by (used in) financing activities	374	(345)	1,916
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	18	(163)	87
Cash, Cash Equivalents and Restricted Cash at Beginning of Year	91	254	167
Cash, Cash Equivalents and Restricted Cash at End of Year	109	91	254
CERC Corp
Cash Flows from Operating Activities:
Net income (loss)	512	725	390
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	493	448	483
Deferred income taxes	(41)	178	101
Gain on divestitures	0	(557)	(11)
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	410	(376)	(68)
Accounts receivable/payable–affiliated companies	(81)	41	27
Inventory	101	(50)	(62)
Taxes receivable	(89)	0	(28)
Accounts payable	(250)	190	95
Net regulatory assets and liabilities	1,152	244	(2,095)
Other current assets and liabilities	85	13	(39)
Other non-current assets and liabilities	(1)	(2)	(31)
Other operating activities, net	21	2	19
Net cash provided by operating activities	2,312	856	(1,219)
Cash Flows from Investing Activities:
Capital expenditures	(1,619)	(1,661)	(1,324)
Increase in notes receivable–affiliated companies	(1)	0	0
Proceeds from divestitures (Note 4)	0	2,075	22
Other investing activities, net	(23)	(8)	15
Net cash used in investing activities	(1,643)	406	(1,287)
Cash Flows from Financing Activities:
Increase (decrease) in short-term borrowings, net	(10)	452	(27)
Proceeds from (payments of) commercial paper, net	(321)	(94)	552
Proceeds from long-term debt and term loans	2,006	927	1,699
Payments of long-term debt and term loans, including make-whole premiums	(2,332)	(475)	(311)
Payment of debt issuance costs	(14)	(14)	(10)
Dividend to parent	(496)	(844)	(17)
Contribution from parent	500	289	140
Increase (decrease) in notes payable–affiliated companies	0	(1,517)	490
Other financing activities, net	(1)	(1)	(1)
Net cash provided by (used in) financing activities	(668)	(1,277)	2,515
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	1	(15)	9
Cash, Cash Equivalents and Restricted Cash at Beginning of Year	0	15	6
Cash, Cash Equivalents and Restricted Cash at End of Year	$ 1	$ 0	$ 15