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Inventory (Policies) | 3 Months Ended
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Mar. 31, 2026
Inventory Disclosure [Abstract] |
Inventories | Inventories are carried at the lower of cost or market value. Costs of crude oil and other feedstocks and refined products are aggregated on a consolidated basis for purposes of assessing whether the LIFO cost basis of these inventories may have to be written down to market values.

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