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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Cash Flows from Operating Activities    
Net Income $ 646 $ 1,249
Adjustments to reconcile net income to cash provided by operating activities:    
Equity in and distributions from earnings of unconsolidated affiliates (1) (4)
Depreciation of property, plant and equipment and amortization of customer relationships and other intangible assets 444 553
Amortization of capitalized contract costs 226 140
Accretion of asset retirement obligations 20 3
Provision for credit losses 113 133
Amortization of financing costs and debt discounts 13 21
Loss on debt extinguishment 10 260
Amortization of in-the-money contracts and emissions allowances 51 73
Amortization of unearned equity compensation 62 57
Net loss on sale of assets and disposal of assets 10 8
Gain on proceeds from insurance recoveries for property, plant and equipment, net (100) 0
Impairment losses 0 15
Changes in derivative instruments 18 (1,384)
Changes in current and deferred income taxes and liability for uncertain tax benefits 126 390
Changes in collateral deposits in support of risk management activities 197 660
Changes in other working capital (529) (851)
Cash provided by operating activities 1,306 1,323
Cash Flows from Investing Activities    
Payments for acquisitions of businesses and assets (586) (32)
Capital expenditures (595) (172)
Net purchases of emissions allowances (7) (11)
Proceeds from sales of assets 6 11
Proceeds from insurance recoveries for property, plant and equipment, net 100 3
Cash used by investing activities (1,082) (201)
Cash Flows from Financing Activities    
Payments of dividends to preferred and common stockholders (207) (204)
Equivalent shares purchased in lieu of tax withholdings (77) (35)
Payments for share repurchase activity (603) (90)
Net receipts/(payments) from settlement of acquired derivatives that include financing elements 38 (12)
Proceeds from issuance of long-term debt 0 875
Payments of deferred financing costs (31) (12)
Repayments of long-term debt and finance leases (10) (956)
Payments for debt extinguishment costs 0 (257)
Proceeds from credit facilities 865 625
Repayments to credit facilities (730) (625)
Cash used by financing activities (755) (691)
Effect of exchange rate changes on cash and cash equivalents 1 0
Net (Decrease)/Increase in Cash and Cash Equivalents, Funds Deposited by Counterparties and Restricted Cash (530) 431
Cash and Cash Equivalents, Funds Deposited by Counterparties and Restricted Cash at Beginning of Period 1,173 649
Cash and Cash Equivalents, Funds Deposited by Counterparties and Restricted Cash at End of Period $ 643 $ 1,080