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MPLX LP (Tables) | 3 Months Ended
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Mar. 31, 2017
Noncontrolling Interest [Abstract] |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table Text Block] | Changes in MPC’s equity and the offsetting changes to noncontrolling interest resulting from changes in MPC’s and the noncontrolling interest’s ownership interests in MPLX were as follows:
| Three Months Ended March 31,
(In millions) | 2017 |  | 2016
Transfers (to) from noncontrolling interest |  |  |
Increase (decrease) in MPC's additional paid in capital for the issuance of MPLX LP common units to the public | $ | 10 |  |  | $ | (40 | )
Increase in MPC's additional paid in capital for the issuance of MPLX LP common units and general partner units to MPC | 96 |  |  | — |
Net transfers (to) from noncontrolling interests | 106 |  |  | (40 | )
Tax impact | (34 | ) |  | (65 | )
Change in MPC's additional paid-in capital, net of tax | $ | 72 |  |  | $ | (105 | )

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -URI http://asc.fasb.org/extlink&oid=65897068&loc=SL4591554-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=64809438&loc=SL4573702-111684 + Details
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- References No definition available. + Details
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