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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Statement of Comprehensive Income [Abstract] |  |
Net income (loss) | $ 101 | $ (78)
Defined benefit postretirement and post-employment plans: |  |
Actuarial changes, net of tax of $3 and $5 | 4 | 8
Prior service costs, net of tax of ($4) and ($5) | (7) | (8)
Other comprehensive income (loss) | (3) | 0
Comprehensive income (loss) | 98 | (78)
Less comprehensive income (loss) attributable to: |  |
Redeemable noncontrolling interest | 16 | 0
Noncontrolling interests | 55 | (79)
Comprehensive income attributable to MPC | $ 27 | $ 1

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