v3.26.3
Risk Management - Fair Value of Derivative Contracts (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Derivatives Asset $ 78 $ 248
Derivatives Liability (563) (213)
Energy commodity derivative contracts    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 54 171
Derivatives Liability (239) (75)
Interest rate contracts    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 3 36
Derivatives Liability (324) (136)
Foreign currency contracts    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 21 41
Derivatives Liability   (2)
Derivatives designated as hedging instruments    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 24 169
Derivatives Liability (489) (138)
Derivatives designated as hedging instruments | Energy commodity derivative contracts    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 0 92
Derivatives Liability (165) 0
Derivatives designated as hedging instruments | Energy commodity derivative contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:DeferredCreditsAndOtherLiabilitiesNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability (36) 0
Derivatives designated as hedging instruments | Energy commodity derivative contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherAccruedLiabilitiesCurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability (129) 0
Derivatives designated as hedging instruments | Energy commodity derivative contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherAssetsCurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 0 56
Derivatives designated as hedging instruments | Energy commodity derivative contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 0 36
Derivatives designated as hedging instruments | Interest rate contracts    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 3 36
Derivatives Liability (324) (136)
Derivatives designated as hedging instruments | Interest rate contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:DeferredCreditsAndOtherLiabilitiesNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability (264) (111)
Derivatives designated as hedging instruments | Interest rate contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherAccruedLiabilitiesCurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability (60) (25)
Derivatives designated as hedging instruments | Interest rate contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherAssetsCurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 2 4
Derivatives designated as hedging instruments | Interest rate contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 1 32
Derivatives designated as hedging instruments | Foreign currency contracts    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 21 41
Derivatives Liability 0 (2)
Derivatives designated as hedging instruments | Foreign currency contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:DeferredCreditsAndOtherLiabilitiesNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability 0 0
Derivatives designated as hedging instruments | Foreign currency contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherAccruedLiabilitiesCurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability 0 (2)
Derivatives designated as hedging instruments | Foreign currency contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherAssetsCurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 21 0
Derivatives designated as hedging instruments | Foreign currency contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 0 41
Derivatives not designated as hedging instruments | Energy commodity derivative contracts    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 54 79
Derivatives Liability (74) (75)
Derivatives not designated as hedging instruments | Energy commodity derivative contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:DeferredCreditsAndOtherLiabilitiesNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability (25) (1)
Derivatives not designated as hedging instruments | Energy commodity derivative contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherAccruedLiabilitiesCurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability (49) (74)
Derivatives not designated as hedging instruments | Energy commodity derivative contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherAssetsCurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 51 75
Derivatives not designated as hedging instruments | Energy commodity derivative contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Asset $ 3 $ 4