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Fair Value Measurement - Schedule of Commodity Derivative Balances Subject to Right of Setoff (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Offsetting Derivative Assets [Abstract]    
Assets - gross amounts recognized $ 563 $ 488
Assets - amounts without right of setoff 1 0
Assets - gross amounts 562 488
Assets - gross amounts offset 378 278
Assets - net amounts presented 184 210
Assets - cash collateral 0 0
Assets - net amounts 184 210
Offsetting Derivative Liabilities [Abstract]    
Liabilities - gross amounts recognized 489 480
Liabilities - amounts without right of setoff 1 0
Liabilities - gross amounts recognized 488 480
Liabilities - gross amounts offset 378 278
Liabilities - net amounts presented 110 202
Liabilities - cash collateral 2 73
Liabilities - net amounts $ 108 $ 129