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Commitments and Contingencies - Renewable Fuel Standard (Details) - Petroleum Segment - Environmental, Health, and Safety Matters - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Loss Contingencies [Line Items] |  |  |  |  |
Expense (benefit) for compliance with RFS | $ 123 | $ 30 | $ 246 | $ (21) |
RFS obligation | $ 548 |  | $ 548 |  | $ 323

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