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Derivatives and Risk Management Activities - Offsetting Asset and Liabilities (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Derivative Assets    
Effect of Collateral Netting (Liability) $ 1  
Effect of Collateral Netting (Asset)   $ (168)
Commodity Derivatives    
Derivative Assets    
Effect of Collateral Netting (Liability) 1  
Effect of Collateral Netting (Asset)   (168)
Derivative Liabilities    
Gross Position - Assets 147 311
Gross Position - Liabilities (110) (89)
Net Carrying Value Presented on the Balance Sheet, Total 38 54
Other current assets | Commodity Derivatives    
Derivative Assets    
Gross Position - Assets 134 300
Gross Position - Liabilities (55) (71)
Effect of Collateral Netting (Liability) 1  
Effect of Collateral Netting (Asset)   (168)
Net Carrying Value Presented on the Balance Sheet 80 61
Other long-term assets, net | Commodity Derivatives    
Derivative Assets    
Gross Position - Assets 6 9
Gross Position - Liabilities (1) (5)
Net Carrying Value Presented on the Balance Sheet 5 4
Other current liabilities | Commodity Derivatives    
Derivative Liabilities    
Gross Position - Assets 5 2
Gross Position - Liabilities (39) (13)
Net Carrying Value Presented on the Balance Sheet (34) (11)
Other long-term liabilities and deferred credits | Commodity Derivatives    
Derivative Liabilities    
Gross Position - Assets 2  
Gross Position - Liabilities (15)  
Net Carrying Value Presented on the Balance Sheet $ (13) $ 0