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Derivatives and Risk Management Activities - Offsetting Asset and Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Derivative Assets    
Effect of Collateral Netting $ 3 $ 22
Commodity derivatives    
Derivative Assets    
Effect of Collateral Netting 3 22
Derivative Liabilities    
Gross Position - Asset 31 22
Gross Position - Liability (22) (25)
Net Carrying Value Presented on the Balance Sheet, Total 12 19
Other current assets | Commodity derivatives    
Derivative Assets    
Gross Position - Asset 27 25
Gross Position - Liability (16) (24)
Effect of Collateral Netting 3 22
Net Carrying Value Presented on the Balance Sheet 14 23
Other long-term assets, net | Commodity derivatives    
Derivative Assets    
Gross Position - Asset 1  
Net Carrying Value Presented on the Balance Sheet 1 0
Other current liabilities | Commodity derivatives    
Derivative Liabilities    
Gross Position - Asset   (5)
Gross Position - Liability   5
Net Carrying Value Presented on the Balance Sheet 0 0
Other long-term liabilities and deferred credits | Commodity derivatives    
Derivative Assets    
Effect of Collateral Netting 0 0
Derivative Liabilities    
Gross Position - Asset 3 2
Gross Position - Liability (6) (6)
Net Carrying Value Presented on the Balance Sheet $ (3) $ (4)