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Lease Operations (Tables) | 12 Months Ended
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Dec. 31, 2018
Leases [Abstract] |
Schedule of Future Minimum Rental Payments Receivable for Operating Leases [Table Text Block] | The following is a schedule of minimum future rental revenue on the non-cancellable operating leases as of December 31, 2018:
(In millions) | Related Party |  | Third Party |  | Total
2019 | $ | 748 |  |  | $ | 160 |  |  | $ | 908 |
2020 | 750 |  |  | 159 |  |  | 909 |
2021 | 627 |  |  | 150 |  |  | 777 |
2022 | 627 |  |  | 148 |  |  | 775 |
2023 | 616 |  |  | 142 |  |  | 758 |
2024 and thereafter | 2,321 |  |  | 1,111 |  |  | 3,432 |
Total minimum future rentals | $ | 5,689 |  |  | $ | 1,870 |  |  | $ | 7,559 |
Schedule of Property Subject to or Available for Operating Lease [Table Text Block] | The following schedule summarizes MPLX’s investment in assets held for operating lease by major classes as of December 31, 2018 and 2017:
|  | December 31,
(In millions) |  | 2018 |  | 2017
Natural gas gathering and NGL transportation pipelines and facilities |  | $ | 964 |  |  | $ | 851 |
Processing, fractionation and storage facilities |  | 1,398 |  |  | 573 |
Pipelines and related assets |  | 266 |  |  | 253 |
Barges and towing vessels |  | 619 |  |  | 491 |
Terminals and related assets |  | 1,178 |  |  | 822 |
Refinery related assets |  | 938 |  |  | — |
Land, building, office equipment and other |  | 162 |  |  | 44 |
Construction-in-progress |  | 189 |  |  | 85 |
Total |  | 5,714 |  |  | 3,119 |
Less accumulated depreciation |  | 2,038 |  |  | 1,056 |
Property, plant and equipment, net |  | $ | 3,676 |  |  | $ | 2,063 |

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- Definition Tabular disclosure of future minimum payments receivable in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Tabular disclosure of lessor's property under leasing agreements and property available for lease (not currently under lease) by property class, the gross amount, accumulated depreciation and net amount of as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718 + Details
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