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Hedging Activities and Fair Value Measurements, Liability Balance Sheet Offsetting (Details) - Commodity Derivatives [Member] - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Offsetting Liabilities [Line Items] |  |
Gross Amounts of Recognized Liabilities | $ 331 | $ 412
Gross Amounts Offset in the Balance Sheet | 0 | 0
Amounts of Liabilities Presented in the Balance Sheet | 331 | 412
Financial Instruments | (228) | (411)
Cash Collateral Received | 0 | 0
Cash Collateral Paid | (103) | 0
Amounts That Would Have Been Presented On Net Basis | $ 0 | $ 1

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