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Master Limited Partnership (Tables) | 9 Months Ended
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Sep. 30, 2019
Noncontrolling Interest [Abstract] |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net | As a result of equity transactions of MPLX and ANDX, 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 and ANDX were as follows:
| Nine Months Ended September 30,
(In millions) | 2019 |  | 2018
Increase due to the issuance of MPLX common units and general partner units to MPC | $ | — |  |  | $ | 1,114 |
Increase due to GP/IDR Exchange | — |  |  | 1,808 |
Increase (decrease) due to the issuance of MPLX & ANDX common units | (52 | ) |  | 6 |
Increase (decrease) in MPC's additional paid-in capital | (52 | ) |  | 2,928 |
Tax impact | (634 | ) |  | (546 | )
Increase (decrease) in MPC's additional paid-in capital, net of tax | $ | (686 | ) |  | $ | 2,382 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -URI http://asc.fasb.org/extlink&oid=116874947&loc=SL4591554-111686 + Details
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- References No definition available. + Details
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