Condensed Statements of Consolidated Cash Flows (Unaudited) - CERC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash Flows from Operating Activities:
Net income	$ 325	$ 531
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	319	318
Deferred income taxes	(13)	28
Gain on divestitures	0	(303)
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	351	(201)
Inventory	95	132
Accounts payable	(323)	(85)
Net regulatory assets and liabilities	1,025	135
Other current assets and liabilities	(86)	82
Other non-current assets and liabilities	6	(25)
Other operating activities, net	2	58
Net cash provided by operating activities	1,713	580
Cash Flows from Investing Activities:
Capital expenditures	(1,123)	(846)
Proceeds from divestitures	0	2,060
Other investing activities, net	(32)	18
Net cash provided by (used in) investing activities	(1,155)	1,934
Cash Flows from Financing Activities:
Decrease in short-term borrowings, net	(11)	(43)
Payments of commercial paper, net	(1,315)	(1,941)
Proceeds from long-term debt and term loans	3,026	792
Payments of long-term debt and term loan	(2,036)	(1,113)
Payment of debt issuance costs	(16)	(8)
Other financing activities, net	(23)	(6)
Net cash used in financing activities	(519)	(2,621)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	39	(107)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	91	254
Cash, Cash Equivalents and Restricted Cash at End of Period	130	147
CERC
Cash Flows from Operating Activities:
Net income	212	631
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	118	107
Deferred income taxes	21	207
Gain on divestitures	0	(557)
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	233	(203)
Accounts receivable/payable–affiliated companies	(90)	60
Inventory	141	140
Accounts payable	(289)	(88)
Net regulatory assets and liabilities	1,136	98
Other current assets and liabilities	45	90
Other non-current assets and liabilities	3	(2)
Other operating activities, net	1	1
Net cash provided by operating activities	1,531	484
Cash Flows from Investing Activities:
Capital expenditures	(391)	(278)
Increase in notes receivable–affiliated companies	(30)	0
Proceeds from divestitures	0	2,060
Other investing activities, net	(2)	(3)
Net cash provided by (used in) investing activities	(423)	1,779
Cash Flows from Financing Activities:
Decrease in short-term borrowings, net	(11)	(43)
Payments of commercial paper, net	(805)	(776)
Proceeds from long-term debt and term loans	1,698	0
Payments of long-term debt and term loan	(1,775)	(425)
Dividend to parent	(204)	(758)
Payment of debt issuance costs	(9)	0
Decrease in notes payable–affiliated companies	0	(270)
Other financing activities, net	(1)	(1)
Net cash used in financing activities	(1,107)	(2,273)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	1	(10)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	0	15
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 1	$ 5