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Derivatives and Risk Management Activities - Preferred Distribution Rate Reset Option (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Jan. 31, 2023
Dec. 31, 2022
Derivatives and Risk Management Activities          
Gain/(loss) recognized   $ 58 $ (196)    
Preferred Distribution Rate Reset Option | Derivatives Not Designated as a Hedge          
Derivatives and Risk Management Activities          
Derivative liability       $ 131 $ 189
Derivative liability [Extensible Enumeration]         Other long-term liabilities and deferred credits
Preferred Distribution Rate Reset Option | Derivatives Not Designated as a Hedge | Other Income/(Expense), Net          
Derivatives and Risk Management Activities          
Gain/(loss) recognized $ (49) $ 58 $ (196)