Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,700	$ 1,639
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,923	2,753
Equity in (earnings) losses of unconsolidated affiliates	(61)	8
Equity component of AFUDC	(99)	(83)
Impairment of assets and other charges	206	131
Deferred income taxes	67	119
Payments for asset retirement obligations	(255)	(263)
Provision for rate refunds	(65)	(13)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	351	15
Receivables	(180)	85
Inventory	(12)	153
Other current assets	(1,144)	(297)
Increase (decrease) in
Accounts payable	408	(297)
Taxes accrued	(49)	219
Other current liabilities	99	(326)
Other assets	55	77
Other liabilities	91	(47)
Net cash provided by operating activities	4,035	3,873
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(5,117)	(4,636)
Contributions to equity method investments	(32)	(21)
Purchases of debt and equity securities	(2,184)	(3,182)
Proceeds from sales and maturities of debt and equity securities	2,225	3,217
Disbursements to canceled equity method investments		(855)
Other	(384)	(137)
Net cash used in investing activities	(5,492)	(5,614)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	5,714	4,627
Proceeds from the issuance of common stock		5
Payments for the redemption of long-term debt	(3,147)	(2,002)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days	30	75
Payments for the redemption of short-term debt with original maturities greater than 90 days	(257)	(959)
Notes payable and commercial paper	785	1,299
Contributions from noncontrolling interests	126	318
Dividends paid	(1,574)	(1,541)
Other	(101)	(72)
Net cash provided by financing activities	1,576	1,750
Net increase in cash, cash equivalents and restricted cash	119	9
Cash, cash equivalents and restricted cash at beginning of period	520	556
Cash, cash equivalents and restricted cash at end of period	639	565
Significant non-cash transactions:
Accrued capital expenditures	$ 1,264	$ 990