Related Party Expenses (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Related Party Transaction [Line Items] | ||||
| General and administrative expenses | $ 108 | $ 107 | $ 222 | $ 219 |
| Marathon Petroleum Corporation [Member] | ||||
| Related Party Transaction [Line Items] | ||||
| General and administrative expenses | 82 | 81 | 170 | 156 |
| Asset under Construction [Member] | Marathon Petroleum Corporation [Member] | ||||
| Related Party Transaction [Line Items] | ||||
| Property, Plant, and Equipment, before Accumulated Depreciation, Addition | $ 64 | $ 46 | $ 117 | $ 95 |
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of increase in property, plant, and equipment from addition. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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