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Master Limited Partnership (Tables) | 3 Months Ended
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Mar. 31, 2026
Noncontrolling Interest [Line Items] |
Unit Repurchases | Total share repurchases were as follows for the respective periods:
| Three Months Ended March 31, |  |
(In millions, except per share data) | 2026 |  | 2025 |  |  |  |
Number of shares repurchased | 4 |  |  | 7 |  |  |  |  |
Cash paid for shares repurchased | $ | 750 |  |  | $ | 1,057 |  |  |  |  |
Average cost per share(a) | $ | 213.45 |  |  | $ | 147.87 |  |  |  |  |
(a) The average cost per share includes excise tax on share repurchases resulting from the Inflation Reduction Act of 2022, but the excise tax does not reduce the remaining share repurchase authorization.
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net | As a result of equity transactions of MPLX, we are required to adjust non-controlling interest and additional paid-in capital. Changes in MPC’s additional paid-in capital resulting from changes in its ownership interests in MPLX were as follows:
| Three Months Ended March 31, |  |
(Millions of dollars) | 2026 |  | 2025 |  |  |  |
Increase (decrease) due to change in ownership | $ | (21) |  |  | $ | 39 |  |  |  |  |
Tax impact | 7 |  |  | (14) |  |  |  |  |
Increase (decrease) in MPC's additional paid-in capital, net of tax | $ | (14) |  |  | $ | 25 |  |  |  |  |
MPLX LP |
Noncontrolling Interest [Line Items] |
Unit Repurchases | Total unit repurchases were as follows for the respective periods:
| Three Months Ended March 31, |  |
(In millions, except per unit data) | 2026 |  | 2025 |  |  |  |
Number of common units repurchased | 1 |  |  | 2 |  |  |  |  |
Cash paid for common units repurchased | $ | 50 |  |  | $ | 100 |  |  |  |  |
Average cost per unit | $ | 56.63 |  |  | $ | 52.48 |  |  |  |  |

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- Definition The tabular disclosure of the effects of any changes in a parent's ownership interest in a subsidiary on the equity attributable to the parent if the ownership interests in a subsidiary changes during the period. The changes represented by this element did not result in the deconsolidation of the subsidiary. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -Publisher FASB -URI https://asc.fasb.org/1943274/2147481175/810-10-55-4M Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -SubTopic 10 -Topic 810 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-1A + Details
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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-3 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481549/505-30-45-1 + Details
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