CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,172	$ 657
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	539	493
Deferred income taxes and investment tax credits	253	347
Equity earnings	(219)	(326)
Foreign currency transaction (gains) losses, net	(1)	19
Share-based compensation expense	17	17
Fixed-price contracts and other derivatives	(374)	105
Other	142	50
Net change in working capital components	451	326
Distributions from investments	199	204
Changes in other noncurrent assets and liabilities, net	(199)	(285)
Net cash provided by operating activities	1,980	1,607
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(1,830)	(1,204)
Expenditures for investments	(85)	(85)
Purchases of nuclear decommissioning and other trust assets	(181)	(242)
Proceeds from sales of nuclear decommissioning and other trust assets	199	242
Other	2	(1)
Net cash used in investing activities	(1,895)	(1,290)
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	(360)	(349)
Issuances of common stock	0	3
Repurchases of common stock	(31)	(226)
Issuances of debt (maturities greater than 90 days)	1,986	4,023
Payments on debt (maturities greater than 90 days) and finance leases	(1,803)	(1,048)
Increase (decrease) in short-term debt, net	168	(720)
Advances from unconsolidated affiliates	14	18
Proceeds from sales of noncontrolling interests	265	13
Distributions to noncontrolling interests	(43)	(53)
Contributions from noncontrolling interests	97	6
Settlement of cross-currency swaps	(99)	0
Other	(43)	(29)
Net cash provided by financing activities	151	1,638
Effect of exchange rate changes on cash, cash equivalents and restricted cash	5	0
Increase in cash, cash equivalents and restricted cash	241	1,955
Cash, cash equivalents and restricted cash, January 1	462	581
Cash, cash equivalents and restricted cash, March 31	703	2,536
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	305	233
Income tax payments, net of refunds	50	80
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued capital expenditures	1,171	468
Increase in finance lease obligations for investment in PP&E	17	13
Increase in ARO for investment in PP&E	0	23
Preferred stock
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Dividends declared but not paid	11	11
Common stock
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Dividends declared but not paid	$ 374	$ 362