Inventories - Schedule of Inventories (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Inventory Disclosure [Abstract] | ||
| Crude oil and products | $ 1,111 | $ 1,000 |
| Materials and supplies | 866 | 873 |
| Total inventories | 1,977 | 1,873 |
| Inventories valued on the LIFO basis | $ 637 | $ 609 |
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- Definition Carrying amount as of the balance sheet date of finished goods inventories for petroleum products, crude oil, petrochemical products, and other oil and gas inventories. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of LIFO (last in first out) inventory present at the reporting date when inventory is also valued using different valuation methods. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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