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Derivative Assets And Liabilities Table - Fair Value of Derivative Instruments (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Total derivatives assets $ 361 $ 688
Total derivatives liabilities (352) (549)
Designated as Hedging Instrument [Member]    
Total derivatives assets 47 87
Total derivatives liabilities (21) (7)
Not Designated as Hedging Instrument [Member]    
Total derivatives assets 314 601
Total derivatives liabilities (331) (542)
Commodity Derivatives [Member] | Not Designated as Hedging Instrument [Member]    
Total derivatives assets 59 95
Total derivatives liabilities (57) (108)
Commodity Derivatives (Margin Deposits) [Member] | Designated as Hedging Instrument [Member]    
Total derivatives assets 47 87
Total derivatives liabilities (21) (7)
Commodity Derivatives (Margin Deposits) [Member] | Not Designated as Hedging Instrument [Member]    
Total derivatives assets 255 506
Total derivatives liabilities (231) (411)
Interest Rate Derivatives [Member] | Not Designated as Hedging Instrument [Member]    
Total derivatives assets 0 0
Total derivatives liabilities $ (43) $ (23)