CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 657	$ 928
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	493	442
Deferred income taxes and investment tax credits	347	97
Equity earnings	(326)	(318)
Foreign currency transaction losses, net	19	19
Share-based compensation expense	17	17
Fixed-price contracts and other derivatives	105	130
Other	50	59
Net change in working capital components	326	84
Insurance receivable for Aliso Canyon costs	0	31
Distributions from investments	204	208
Changes in other noncurrent assets and liabilities, net	(285)	(195)
Net cash provided by operating activities	1,607	1,502
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(1,204)	(1,181)
Expenditures for investments and acquisitions	(85)	(115)
Purchases of nuclear decommissioning trust assets	(242)	(288)
Proceeds from sales of nuclear decommissioning trust assets	242	288
Advances to unconsolidated affiliates	0	(8)
Distributions from investments	0	4
Other	(1)	(1)
Net cash used in investing activities	(1,290)	(1,301)
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	(349)	(301)
Preferred dividends paid	0	(36)
Issuances of common stock	3	0
Repurchases of common stock	(226)	(37)
Issuances of debt (maturities greater than 90 days)	4,023	102
Payments on debt (maturities greater than 90 days) and finance leases	(1,048)	(1,093)
(Decrease) increase in short-term debt, net	(720)	932
Advances from unconsolidated affiliates	18	20
Proceeds from sales of noncontrolling interests	13	7
Distributions to noncontrolling interests	(53)	0
Contributions from noncontrolling interests	6	0
Other	(29)	(1)
Net cash provided by (used in) financing activities	1,638	(407)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	0	(1)
Increase (decrease) in cash, cash equivalents and restricted cash	1,955	(207)
Total cash, cash equivalents and restricted cash on the Condensed Consolidated Statements of Cash Flows	2,536	778
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	233	225
Income tax payments, net of refunds	80	30
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued capital expenditures	468	499
Increase in finance lease obligations for investment in PP&E	13	15
Increase in ARO for investment in PP&E, net	23	8
Conversion of mandatory convertible preferred stock	0	1,693
Preferred stock
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Dividends declared but not paid	11	32
Common Stock
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Dividends declared but not paid	$ 362	$ 333