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Hedging Activities and Fair Value Measurements, Liability Balance Sheet Offsetting (Details) - Commodity Derivatives [Member] - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Offsetting Liabilities [Line Items]    
Gross Amounts of Recognized Liabilities $ 551 $ 495
Gross Amounts Offset in the Balance Sheet 0 0
Amounts of Liabilities Presented in the Balance Sheet 551 495
Financial Instruments (550) (495)
Cash Collateral Received 0 0
Cash Collateral Paid 0 0
Amounts That Would Have Been Presented On Net Basis $ 1 $ 0