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Derivative Assets And Liabilities Table - Fair Value of Derivative Instruments (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Total derivatives assets $ 419 $ 688
Total derivatives liabilities (449) (549)
Designated as Hedging Instrument [Member]    
Total derivatives assets 23 87
Total derivatives liabilities (7) (7)
Not Designated as Hedging Instrument [Member]    
Total derivatives assets 396 601
Total derivatives liabilities (442) (542)
Commodity Derivatives [Member] | Not Designated as Hedging Instrument [Member]    
Total derivatives assets 71 95
Total derivatives liabilities (71) (108)
Commodity Derivatives (Margin Deposits) [Member] | Designated as Hedging Instrument [Member]    
Total derivatives assets 23 87
Total derivatives liabilities (7) (7)
Commodity Derivatives (Margin Deposits) [Member] | Not Designated as Hedging Instrument [Member]    
Total derivatives assets 311 506
Total derivatives liabilities (371) (411)
Interest Rate Derivatives [Member] | Not Designated as Hedging Instrument [Member]    
Total derivatives assets 14 0
Total derivatives liabilities $ 0 $ (23)