Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows — operating activities:
Net income (loss)	$ (268)	$ 18
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Depreciation and amortization	772	555
Deferred income tax benefit, net	(185)	(23)
Unrealized net loss from mark-to-market valuations of commodities	567	176
Unrealized net (gain) loss from mark-to-market valuations of interest rate swaps	48	(47)
Unrealized net (gain) loss from nuclear decommissioning trusts	15	(28)
Asset retirement obligation accretion expense	34	19
Bad debt expense	44	36
Stock-based compensation expense	21	21
Other, net	57	(28)
Changes in operating assets and liabilities:
Margin deposits, net	(217)	128
Accrued interest	51	(3)
Accrued taxes	(109)	(111)
Accrued employee incentive	(177)	(169)
Other operating assets and liabilities	(54)	(232)
Cash provided by operating activities	599	312
Cash flows — investing activities:
Capital expenditures, including nuclear fuel purchases and LTSA prepayments	(768)	(465)
Energy Harbor acquisition (net of cash acquired)	0	(3,070)
Proceeds from sales of nuclear decommissioning trust fund securities	2,107	214
Investments in nuclear decommissioning trust fund securities	(2,112)	(220)
Proceeds from sales of environmental allowances	21	17
Purchases of environmental allowances	(307)	(131)
Proceeds from sale of property, plant and equipment, including nuclear fuel	0	127
Other, net	(2)	0
Cash used in investing activities	(1,061)	(3,528)
Cash flows — financing activities:
Issuances of long-term debt	0	700
Repayments/repurchases of debt	(6)	(756)
Net borrowings (repayments) under accounts receivable financing	332	875
Borrowings under Commodity-Linked Facility	0	500
Stock repurchases	(337)	(291)
Dividends paid to common stockholders	(83)	(77)
Dividends paid to preferred stockholders	(21)	0
Tax withholding on stock based compensation	(50)	(12)
TRA Repurchase and tender offer — return of capital	0	(122)
Other, net	1	(24)
Cash (used in) provided by financing activities	(164)	793
Net change in cash, cash equivalents and restricted cash	(626)	(2,423)
Cash, cash equivalents and restricted cash — beginning balance	1,222	3,539
Cash, cash equivalents and restricted cash — ending balance	$ 596	$ 1,116