Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 3,113	$ 2,915
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		4,414	4,189
Equity component of AFUDC		(151)	(126)
Impairment of assets and other charges		202	342
Deferred income taxes		209	206
Equity in earnings of unconsolidated affiliates		(87)	(14)
Contributions to qualified pension plans		(58)
Payments for asset retirement obligations		(418)	(389)
Provision for rate refunds		(97)	(41)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		33	116
Receivables		(356)	(167)
Inventory		(290)	268
Other current assets(a)	[1]	(2,403)	(643)
Increase (decrease) in
Accounts payable		504	(146)
Taxes accrued		206	431
Other current liabilities		263	10
Other assets		(84)	199
Other liabilities		188	77
Net cash provided by operating activities		5,188	7,227
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(8,148)	(7,089)
Contributions to equity method investments		(37)	(30)
Purchases of debt and equity securities		(3,619)	(4,292)
Proceeds from sales and maturities of debt and equity securities		3,691	4,335
Disbursements to canceled equity method investments			855
Other		517	269
Net cash used in investing activities		(8,630)	(8,200)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		9,466	6,379
Proceeds from the issuance of common stock			5
Payments for the redemption of long-term debt		(3,803)	(3,696)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days		80	109
Payments for the redemption of short-term debt with original maturities greater than 90 days		(287)	(997)
Notes payable and commercial paper		476	165
Contributions from noncontrolling interests		132	1,556
Dividends paid		(2,389)	(2,340)
Other		(124)	(21)
Net cash provided by financing activities		3,551	1,160
Net increase in cash, cash equivalents and restricted cash		109	187
Cash, cash equivalents and restricted cash at beginning of period		520	556
Cash, cash equivalents and restricted cash at end of period		629	743
Significant non-cash transactions:
Accrued capital expenditures		$ 1,387	$ 998

[1] Includes approximately $2.2 billion of under-collected deferred fuel regulatory assets for the nine months ended September 30, 2022