Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 4,614	$ 2,874	$ 2,455
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	6,419	6,084	5,843
Equity in losses (earnings) of unconsolidated affiliates	9	(98)	(114)
Losses on sales of Commercial Renewables Disposal Groups	14	1,725	1,748
Equity component of AFUDC	(233)	(198)	(197)
Impairment of assets and other charges	38	85	434
Deferred income taxes	987	3	(200)
Contributions to qualified pension plans	(100)	(100)	(58)
Payments for asset retirement obligations	(545)	(632)	(584)
Provision for rate refunds	(27)	(63)	(130)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	(103)	(18)	19
Receivables	(23)	443	(788)
Inventory	(212)	(706)	(476)
Other current assets	885	(267)	(1,498)
Increase (decrease) in
Accounts payable	1,329	(800)	805
Taxes accrued	32	126	10
Other current liabilities	(11)	(26)	(153)
Other assets	(1,170)	914	(1,577)
Other liabilities	451	584	410
Net cash provided by operating activities	12,328	9,878	5,927
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(12,280)	(12,604)	(11,367)
Contributions to equity method investments	(8)	(34)	(58)
Return of investment capital	25	16	6
Purchases of debt and equity securities	(5,703)	(3,761)	(4,243)
Proceeds from sales and maturities of debt and equity securities	5,803	3,824	4,333
Proceeds from the sales of other assets	49	149	83
Proceeds from the sales of Commercial Renewables Disposal Groups, net of cash divested	0	734	0
Other	(1,009)	(799)	(727)
Net cash used in investing activities	(13,123)	(12,475)	(11,973)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	8,956	10,028	11,874
Proceeds from the issuance of common stock	405	8	9
Redemption of preferred stock	(1,000)	0	0
Payments for the redemption of long-term debt	(3,357)	(4,737)	(4,396)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days	557	610	80
Payments for the redemption of short-term debt with original maturities greater than 90 days	(1,096)	(125)	(287)
Notes payable and commercial paper	(388)	(343)	781
Contributions from noncontrolling interests	47	278	1,377
Dividends paid	(3,213)	(3,244)	(3,179)
Other	(52)	(124)	(130)
Net cash provided by financing activities	859	2,351	6,129
Net increase (decrease) in cash, cash equivalents and restricted cash	64	(246)	83
Cash, cash equivalents and restricted cash at beginning of period	357	603	520
Cash, cash equivalents and restricted cash at end of period	421	357	603
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized	3,284	2,883	2,361
Cash paid for (received from) income taxes, net (includes transferable tax credit sale proceeds of $558, $28 and $0, respectively)	(400)	1	(6)
Significant non-cash transactions:
Accrued capital expenditures	$ 1,909	$ 1,908	$ 1,766