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Hedging Activities and Fair Value Measurements, Asset Balance Sheet Offsetting (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Interest rate derivatives [Member]    
Offsetting Assets [Line Items]    
Gross Amounts of Recognized Assets $ 26  
Gross Amounts Offset in the Balance Sheet 0  
Amounts of Assets Presented in the Balance Sheet 26  
Financial Instruments 0  
Cash Collateral Received 0  
Cash Collateral Paid 0  
Amounts That Would Have Been Presented On Net Basis 26  
Commodity Derivatives [Member]    
Offsetting Assets [Line Items]    
Gross Amounts of Recognized Assets 486 $ 239
Gross Amounts Offset in the Balance Sheet 0 0
Amounts of Assets Presented in the Balance Sheet 486 239
Financial Instruments (411) (233)
Cash Collateral Received 0 0
Cash Collateral Paid (74) 0
Amounts That Would Have Been Presented On Net Basis $ 1 $ 6