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Supplemental Cash Flow Information - Summary of Supplemental Cash Flow Information (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2026 | Jun. 30, 2025
Supplemental Cash Flow Elements [Abstract] |  |  |
Interest paid (net of amounts capitalized) | $ 576 | $ 451 |
Income taxes paid | 3 | 3 |
Payments on operating leases | 33 | 32 |
Principal payments under finance lease obligations | 5 | 1 |
Net transfers of property, plant and equipment to lease receivable | 109 | 86 |
Contribution of assets(1) | 0 | 115 | [1]
ROU assets obtained in exchange for new operating lease obligations | 9 | 20 |
ROU assets obtained in exchange for new finance lease obligations | $ 4 | $ 3 |
[1] | Represents the book value of assets contributed by MPLX to a joint venture.

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