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Hedging Activities and Fair Value Measurements, Asset Balance Sheet Offsetting (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
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 | $ 229 | 486
Gross Amounts Offset in the Balance Sheet | 0 | 0
Amounts of Assets Presented in the Balance Sheet | 229 | 486
Financial Instruments | (228) | (411)
Cash Collateral Received | 0 | 0
Cash Collateral Paid | 0 | (74)
Amounts That Would Have Been Presented On Net Basis | $ 1 | $ 1

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