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Segment Information (Income from Equity Method Investments) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2026 | Mar. 31, 2025
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items] |  |
Income from equity method investments | $ 176 | $ 230
Operating Segments | Refining & Marketing |  |
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items] |  |
Income from equity method investments | (2) | 5
Operating Segments | Midstream |  |
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items] |  |
Income from equity method investments | 207 | 209
Operating Segments | Renewable Diesel |  |
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items] |  |
Income from equity method investments | $ (29) | $ 16

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