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Accounting for Derivative Instruments and Hedging Activities - Fair Value within the Derivative Instrument Valuation (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Derivative [Line Items]    
Derivative Liabilities   $ 3,177
Derivative Asset $ 4,077 4,396
Derivative Liability $ 3,227 $ 3,404
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Derivative instruments Derivative instruments
Deferred gains/losses on NPNS contracts - current    
Derivative [Line Items]    
Derivative Asset $ 309 $ 376
Derivative Liability 65 90
Deferred gains/losses on NPNS contracts - long-term    
Derivative [Line Items]    
Derivative Asset 552 621
Derivative Liability 80 137
Deferred gains/losses on NPNS contracts    
Derivative [Line Items]    
Derivative Asset 861 997
Derivative Liability 145 227
Not Designated as Hedging Instrument    
Derivative [Line Items]    
Derivative Assets 3,216 3,399
Derivative Liabilities 3,082 3,177
Not Designated as Hedging Instrument | Interest rate contracts current    
Derivative [Line Items]    
Derivative Assets 0 0
Derivative Liabilities 3 3
Not Designated as Hedging Instrument | Interest rate contracts long-term    
Derivative [Line Items]    
Derivative Assets 0 9
Derivative Liabilities 4 0
Not Designated as Hedging Instrument | Foreign exchange contracts - current    
Derivative [Line Items]    
Derivative Assets 3 15
Derivative Liabilities 1 0
Not Designated as Hedging Instrument | Foreign exchange contracts - long-term    
Derivative [Line Items]    
Derivative Assets 0 7
Derivative Liabilities 2 1
Not Designated as Hedging Instrument | Commodity contracts - current    
Derivative [Line Items]    
Derivative Assets 2,020 2,295
Derivative Liabilities 1,738 2,067
Not Designated as Hedging Instrument | Commodity contracts - long-term    
Derivative [Line Items]    
Derivative Assets 1,193 1,073
Derivative Liabilities 1,077 903
Not Designated as Hedging Instrument | Consumer Financing Program - current    
Derivative [Line Items]    
Derivative Assets 0 0
Derivative Liabilities 147 137
Not Designated as Hedging Instrument | Consumer Financing Program - long-term    
Derivative [Line Items]    
Derivative Assets 0 0
Derivative Liabilities $ 110 $ 66