Condensed Statements of Consolidated Cash Flows - CERC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash Flows from Operating Activities:
Net income	$ 531	$ 363
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	318	307
Deferred income taxes	28	66
Gain on divestitures	(303)	0
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	(201)	29
Inventory	132	99
Accounts payable	(85)	(55)
Net regulatory assets and liabilities	135	(2,297)
Other current assets and liabilities	82	(121)
Other non-current assets and liabilities	(25)	3
Other operating activities, net	58	2
Net cash provided by (used in) operating activities	580	(1,681)
Cash Flows from Investing Activities:
Capital expenditures	(846)	(594)
Proceeds from divestitures	2,060	0
Other investing activities, net	18	(10)
Net cash provided by (used in) investing activities	1,934	(604)
Cash Flows from Financing Activities:
Decrease in short-term borrowings, net	(43)	0
Proceeds from (payments of) commercial paper, net	(1,941)	38
Proceeds from long-term debt	792	2,795
Payments of long-term debt, including make-whole premiums	(1,113)	(388)
Payment of debt issuance costs	(8)	(20)
Other financing activities, net	(6)	(4)
Net cash provided by (used in) financing activities	(2,621)	2,285
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(107)	0
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	254	167
Cash, Cash Equivalents and Restricted Cash at End of Period	147	167
CERC Corp
Cash Flows from Operating Activities:
Net income	554	151
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	72	80
Deferred income taxes	196	41
Gain on divestitures	(557)	0
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	(176)	(41)
Accounts receivable/payable–affiliated companies	90	(5)
Inventory	133	64
Accounts payable	(74)	(10)
Net regulatory assets and liabilities	125	(2,065)
Other current assets and liabilities	(14)	7
Other non-current assets and liabilities	(3)	(10)
Other operating activities, net	1	1
Net cash provided by (used in) operating activities	347	(1,787)
Cash Flows from Investing Activities:
Capital expenditures	(197)	(133)
Proceeds from divestitures	2,060	0
Other investing activities, net	(3)	2
Net cash provided by (used in) investing activities	1,860	(131)
Cash Flows from Financing Activities:
Decrease in short-term borrowings, net	(43)	0
Proceeds from (payments of) commercial paper, net	(776)	226
Proceeds from long-term debt	0	1,699
Payments of long-term debt, including make-whole premiums	(425)	0
Dividend to parent	(743)	0
Payment of debt issuance costs	0	(6)
Decrease in notes payable–affiliated companies	(224)	0
Other financing activities, net	0	(1)
Net cash provided by (used in) financing activities	(2,211)	1,918
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(4)	0
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	8	1
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 4	$ 1