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Hedging Activities and Fair Value Measurements, Liability Balance Sheet Offsetting (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Interest rate derivatives [Member]    
Offsetting Liabilities [Line Items]    
Gross Amounts of Recognized Liabilities   $ 31
Gross Amounts Offset in the Balance Sheet   0
Amounts of Liabilities Presented in the Balance Sheet   31
Financial Instruments   0
Cash Collateral Received   0
Cash Collateral Paid   0
Amounts That Would Have Been Presented On Net Basis   31
Commodity Derivatives [Member]    
Offsetting Liabilities [Line Items]    
Gross Amounts of Recognized Liabilities $ 776 471
Gross Amounts Offset in the Balance Sheet 0 0
Amounts of Liabilities Presented in the Balance Sheet 776 471
Financial Instruments (775) (450)
Cash Collateral Received 0 1
Cash Collateral Paid 0 (21)
Amounts That Would Have Been Presented On Net Basis $ 1 $ 1