Condensed Statements of Consolidated Cash Flows - 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
Loss on equity securities	17	23
Gain on indexed debt securities	(106)	(26)
Equity in (earnings) losses of unconsolidated affiliates	0	(108)
Distributions from unconsolidated affiliates	0	39
Pension contributions	(2)	(8)
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	(201)	29
Inventory	132	99
Taxes receivable	1	3
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 Sale and Maturity of Marketable Securities	702	0
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
Payment of obligation for finance lease	(171)	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)
Payment of dividends on Common Stock	(107)	(88)
Payment of dividends on Preferred Stock	(24)	(48)
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