v3.26.1
Risk Management - Fair Value of Derivative Contracts (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Derivatives Asset $ 124 $ 248
Derivatives Liability (284) (213)
Energy commodity derivative contracts    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 75 171
Derivatives Liability (107) (75)
Interest rate contracts    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 24 36
Derivatives Liability (177) (136)
Foreign currency contracts    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 25 41
Derivatives Liability   (2)
Derivatives designated as hedging instruments    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 64 169
Derivatives Liability (216) (138)
Derivatives designated as hedging instruments | Energy commodity derivative contracts    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 15 92
Derivatives Liability (39) 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 3 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 12 36
Derivatives designated as hedging instruments | Energy commodity derivative contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability (30) 0
Derivatives designated as hedging instruments | Energy commodity derivative contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability (9) 0
Derivatives designated as hedging instruments | Interest rate contracts    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 24 36
Derivatives Liability (177) (136)
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 22 32
Derivatives designated as hedging instruments | Interest rate contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability (32) (25)
Derivatives designated as hedging instruments | Interest rate contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability (145) (111)
Derivatives designated as hedging instruments | Foreign currency contracts    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 25 41
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 25 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 designated as hedging instruments | Foreign currency contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherLiabilitiesCurrent    
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:OtherLiabilitiesNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability 0 0
Derivatives not designated as hedging instruments    
Derivatives, Fair Value [Line Items]    
Derivatives Asset 60 79
Derivatives Liability (68) (75)
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 57 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
Derivatives not designated as hedging instruments | Energy commodity derivative contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability (33) (74)
Derivatives not designated as hedging instruments | Energy commodity derivative contracts | Statement of Financial Position Location Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivatives Liability $ (35) $ (1)