Acquisitions and Other Transactions (Northwind Midstream) (Details) - USD ($) $ in Millions |
Aug. 29, 2025 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Aug. 11, 2025 |
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| Business Combination [Line Items] | ||||
| Goodwill | $ 9,335 | $ 9,354 | ||
| MPLX: | Senior notes | ||||
| Business Combination [Line Items] | ||||
| Debt instrument, face amount | $ 4,500 | |||
| Northwind Midstream Acquisition | ||||
| Business Combination [Line Items] | ||||
| Voting equity interest acquired, percentage | 100.00% | |||
| Total cash paid | $ 2,400 | |||
| Acquired finite-lived intangible assets, weighted average useful life | 15 years | |||
| Goodwill | $ 360 |
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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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- Definition Percentage of voting equity interest acquired in business combination. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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