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Hedging Activities and Fair Value Measurements, Derivative Fair Value Amounts (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Interest rate derivatives [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives | $ 2 |
Commodity derivatives [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives | 677 | $ 575
Liability Derivatives | 551 | 495
Derivatives designated as hedging instruments [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives | 393 | 232
Liability Derivatives | 282 | 182
Derivatives designated as hedging instruments [Member] | Interest rate derivatives [Member] | Current assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives | 2 | 0
Derivatives designated as hedging instruments [Member] | Interest rate derivatives [Member] | Current liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives | 0 | 0
Derivatives designated as hedging instruments [Member] | Commodity derivatives [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives | 391 | 232
Liability Derivatives | 282 | 182
Derivatives designated as hedging instruments [Member] | Commodity derivatives [Member] | Current assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives | 345 | 210
Derivatives designated as hedging instruments [Member] | Commodity derivatives [Member] | Other assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives | 46 | 22
Derivatives designated as hedging instruments [Member] | Commodity derivatives [Member] | Current liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives | 280 | 178
Derivatives designated as hedging instruments [Member] | Commodity derivatives [Member] | Other liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives | 2 | 4
Derivatives not designated as hedging instruments [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives | 286 | 343
Liability Derivatives | 269 | 313
Derivatives not designated as hedging instruments [Member] | Commodity derivatives [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives | 286 | 343
Liability Derivatives | 269 | 313
Derivatives not designated as hedging instruments [Member] | Commodity derivatives [Member] | Current assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives | 268 | 324
Derivatives not designated as hedging instruments [Member] | Commodity derivatives [Member] | Other assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives | 18 | 19
Derivatives not designated as hedging instruments [Member] | Commodity derivatives [Member] | Current liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives | 258 | 293
Derivatives not designated as hedging instruments [Member] | Commodity derivatives [Member] | Other liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives | $ 11 | $ 20

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