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Fair Value of Financial Instruments - Assets and Liabilities Measured and Recorded at Fair Value (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments in securities (classified within other current and non-current assets) $ 19 $ 19
Other trust fund investments (classified within other non-current assets):    
U.S. government and federal agency obligations   1
Measured using net asset value practical expedient:    
Total assets 7,158 12,858
Derivative liabilities:    
Derivative contracts 4,680 8,441
Foreign exchange    
Derivative assets:    
Derivative contracts 12 18
Derivative liabilities:    
Derivative contracts 1 2
Commodity contracts    
Derivative assets:    
Derivative contracts 6,196 11,976
Derivative liabilities:    
Derivative contracts 4,551 8,439
Interest rate contracts    
Derivative assets:    
Derivative contracts 32  
Consumer Financing Program    
Derivative liabilities:    
Derivative contracts 128  
Cash and cash equivalents    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 25 15
U.S. government and federal agency obligations    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 76 86
Federal agency mortgage-backed securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 110 101
Commercial mortgage-backed securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 31 35
Corporate debt securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 111 114
Equity securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 451 403
Foreign government fixed income securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 1 1
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments in securities (classified within other current and non-current assets) 0 0
Other trust fund investments (classified within other non-current assets):    
U.S. government and federal agency obligations   1
Measured using net asset value practical expedient:    
Total assets 1,673 2,432
Derivative liabilities:    
Derivative contracts 910 1,244
Level 1 | Foreign exchange    
Derivative assets:    
Derivative contracts 0 0
Derivative liabilities:    
Derivative contracts 0 0
Level 1 | Commodity contracts    
Derivative assets:    
Derivative contracts 1,123 1,929
Derivative liabilities:    
Derivative contracts 910 1,244
Level 1 | Interest rate contracts    
Derivative assets:    
Derivative contracts 0  
Level 1 | Consumer Financing Program    
Derivative liabilities:    
Derivative contracts 0  
Level 1 | Cash and cash equivalents    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 25 15
Level 1 | U.S. government and federal agency obligations    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 74 84
Level 1 | Federal agency mortgage-backed securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 0 0
Level 1 | Commercial mortgage-backed securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 0 0
Level 1 | Corporate debt securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 0 0
Level 1 | Equity securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 451 403
Measured using net asset value practical expedient:    
Equity securities 0 0
Level 1 | Foreign government fixed income securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 0 0
Level 1 | Equity securities — nuclear trust fund investments (classified within non-current assets - held-for-sale)    
Measured using net asset value practical expedient:    
Equity securities 0 0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments in securities (classified within other current and non-current assets) 19 19
Other trust fund investments (classified within other non-current assets):    
U.S. government and federal agency obligations   0
Measured using net asset value practical expedient:    
Total assets 4,582 9,086
Derivative liabilities:    
Derivative contracts 3,254 6,451
Level 2 | Foreign exchange    
Derivative assets:    
Derivative contracts 12 18
Derivative liabilities:    
Derivative contracts 1 2
Level 2 | Commodity contracts    
Derivative assets:    
Derivative contracts 4,264 8,796
Derivative liabilities:    
Derivative contracts 3,253 6,449
Level 2 | Interest rate contracts    
Derivative assets:    
Derivative contracts 32  
Level 2 | Consumer Financing Program    
Derivative liabilities:    
Derivative contracts 0  
Level 2 | Cash and cash equivalents    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 0 0
Level 2 | U.S. government and federal agency obligations    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 2 2
Level 2 | Federal agency mortgage-backed securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 110 101
Level 2 | Commercial mortgage-backed securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 31 35
Level 2 | Corporate debt securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 111 114
Level 2 | Equity securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 0 0
Measured using net asset value practical expedient:    
Equity securities 0 0
Level 2 | Foreign government fixed income securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 1 1
Level 2 | Equity securities — nuclear trust fund investments (classified within non-current assets - held-for-sale)    
Measured using net asset value practical expedient:    
Equity securities 0 0
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments in securities (classified within other current and non-current assets) 0 0
Other trust fund investments (classified within other non-current assets):    
U.S. government and federal agency obligations   0
Derivative assets:    
Derivative contracts 809 1,251
Measured using net asset value practical expedient:    
Total assets 809 1,251
Derivative liabilities:    
Derivative contracts 516 746
Level 3 | Foreign exchange    
Derivative assets:    
Derivative contracts 0 0
Derivative liabilities:    
Derivative contracts 0 0
Level 3 | Commodity contracts    
Derivative assets:    
Derivative contracts 809 1,251
Derivative liabilities:    
Derivative contracts 388 746
Level 3 | Interest rate contracts    
Derivative assets:    
Derivative contracts 0  
Level 3 | Consumer Financing Program    
Derivative liabilities:    
Derivative contracts 128  
Level 3 | Cash and cash equivalents    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 0 0
Level 3 | U.S. government and federal agency obligations    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 0 0
Level 3 | Federal agency mortgage-backed securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 0 0
Level 3 | Commercial mortgage-backed securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 0 0
Level 3 | Corporate debt securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 0 0
Level 3 | Equity securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 0 0
Measured using net asset value practical expedient:    
Equity securities 0 0
Level 3 | Foreign government fixed income securities    
Nuclear trust fund investments (classified within non-current assets - held-for-sale):    
Nuclear trust fund investments 0 0
Level 3 | Equity securities — nuclear trust fund investments (classified within non-current assets - held-for-sale)    
Measured using net asset value practical expedient:    
Equity securities 0 0
Net Asset Value | Equity securities    
Measured using net asset value practical expedient:    
Equity securities 6 6
Net Asset Value | Equity securities — nuclear trust fund investments (classified within non-current assets - held-for-sale)    
Measured using net asset value practical expedient:    
Equity securities $ 88 $ 83