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v3.26.1

Debt (Outstanding Borrowings) (Detail) - USD ($) $ in Millions | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Total debt | $ 33,272 | $ 33,305
Unamortized debt issuance costs | (214) | (204)
Unamortized discount, net of unamortized premium | (233) | (225)
Amounts due within one year | (2,119) | (2,371)
Long-term debt | 30,706 | 30,505
MPC: |  |
Finance lease obligations | 663 | 689
Total debt | 7,266 | 7,299
MPC: | Senior notes |  |
Long-term debt, gross | 6,449 | 6,449
MPC: | Bonds |  |
Other long-term debt | 154 | 161
MPLX: |  |
Finance lease obligations | 6 | 6
Total debt | 26,006 | 26,006
MPLX: | Senior notes |  |
Long-term debt, gross | $ 26,000 | $ 26,000

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