Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows — operating activities:
Net income	$ 59	$ 485
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	1,534	1,177
Deferred income tax expense (benefit), net	(128)	115
Impairment of long-lived and other assets	68	0
Unrealized net loss from mark-to-market valuations of commodities	551	130
Unrealized net (gain) loss from mark-to-market valuations of interest rate swaps	74	(58)
Unrealized net gain from nuclear decommissioning trusts	(74)	(55)
Asset retirement obligation accretion expense	66	52
Bad debt expense	87	72
Stock-based compensation expense	46	53
Involuntary conversion gain	(80)	0
Other, net	13	(28)
Changes in operating assets and liabilities:
Margin deposits, net	(368)	433
Accrued interest	(5)	4
Accrued taxes	(56)	(58)
Accrued employee incentive	(145)	(140)
Other operating assets and liabilities	(471)	(674)
Cash provided by operating activities	1,171	1,508
Cash flows — investing activities:
Capital expenditures, including nuclear fuel purchases and LTSA prepayments	(1,458)	(963)
Energy Harbor acquisition (net of cash acquired)	0	(3,065)
Proceeds from sales of nuclear decommissioning trust fund securities	3,024	777
Investments in nuclear decommissioning trust fund securities	(3,035)	(788)
Proceeds from sales of environmental allowances	25	65
Purchases of environmental allowances	(392)	(359)
Insurance proceeds for recovery of damaged property, plant and equipment	173	1
Proceeds from sale of property, plant and equipment, including nuclear fuel	0	129
Other, net	(8)	6
Cash used in investing activities	(1,671)	(4,197)
Cash flows — financing activities:
Issuances of debt	209	2,200
Repayments/repurchases of debt	(757)	(1,106)
Net borrowings (repayments) under accounts receivable financing	375	750
Borrowings under Commodity-Linked Facility	987	500
Repayments under Commodity-Linked Facility	(126)	(500)
Debt issuance costs	0	(32)
Stock repurchases	(589)	(622)
Dividends paid to common stockholders	(152)	(150)
Dividends paid to preferred stockholders	(96)	(75)
Dividends paid to noncontrolling interest holders	0	(15)
Tax withholding on stock based compensation	(50)	(11)
Principal payment on forward repurchase obligation	(41)	0
TRA Repurchase and tender offer — return of capital	0	(122)
Other, net	13	(6)
Cash (used in) provided by financing activities	(227)	811
Net change in cash, cash equivalents and restricted cash	(727)	(1,878)
Cash, cash equivalents and restricted cash — beginning balance	1,222	3,539
Cash, cash equivalents and restricted cash — ending balance	$ 495	$ 1,661