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Segment Information - Revenues and Adjusted EBITDA (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total segment revenues and other income |  | $ 1,715 | $ 1,712 | $ 1,578 | $ 1,420 | $ 1,085 | $ 980 | $ 916 | $ 886 | $ 6,425 | $ 3,867 | $ 3,029
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  | 5,007 |  |
Rental income |  |  |  |  |  |  |  |  |  | 349 | 277 | 298
Income (Loss) from Equity Method Investments | [1],[2] |  |  |  |  |  |  |  |  | 240 | 78 | (74)
Other income |  |  |  |  |  |  |  |  |  | 7 | 6 | 7
Revenues | [3] |  |  |  |  |  |  |  |  | 5 | (6) | (36)
Ohio Condensate |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Impairment related to equity method investment from asset impairment and elimination of basis differential |  |  |  |  |  |  |  |  |  |  |  | 89
Operating Segments |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  | 3,475 | 2,004 | 1,419
Logistics and Storage [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  | 2,303 |  |
Logistics and Storage [Member] | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total segment revenues and other income | [4] |  |  |  |  |  |  |  |  | 3,240 | 1,562 | 1,294
Rental income |  |  |  |  |  |  |  |  |  | 725 | 279 | 235
Income (Loss) from Equity Method Investments |  |  |  |  |  |  |  |  |  | 166 | 36 | 0
Other income |  |  |  |  |  |  |  |  |  | 46 | 47 | 53
Adjusted EBITDA | [5] |  |  |  |  |  |  |  |  | 2,057 | 775 | 395
Growth Capital Expenditures |  |  |  |  |  |  |  |  |  | 452 | 433 | 493
Maintenance Capital Expenditures |  |  |  |  |  |  |  |  |  | 104 | 79 | 58
Gathering and Processing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  | 2,704 |  |
Gathering and Processing [Member] | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total segment revenues and other income | [4] |  |  |  |  |  |  |  |  | 3,185 | 2,305 | 1,735
Rental income |  |  |  |  |  |  |  |  |  | 342 | 277 | 298
Income (Loss) from Equity Method Investments | [6] |  |  |  |  |  |  |  |  | 74 | 42 | (74)
Other income |  |  |  |  |  |  |  |  |  | 60 | 51 | 40
Adjusted EBITDA | [5] |  |  |  |  |  |  |  |  | 1,418 | 1,229 | 1,024
Growth Capital Expenditures |  |  |  |  |  |  |  |  |  | 1,432 | 948 | 720
Maintenance Capital Expenditures |  |  |  |  |  |  |  |  |  | 42 | 24 | 26
Service [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  | 1,704 | 1,156 | 958
Service [Member] | Logistics and Storage [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  | 130 |  |
Service [Member] | Logistics and Storage [Member] | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  | 2,289 | 1,200 | 1,006
Service [Member] | Gathering and Processing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  | 1,574 |  |
Service [Member] | Gathering and Processing [Member] | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  | 1,574 | 1,038 | 888
Product [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  | 902 | 889 | 572
Product [Member] | Logistics and Storage [Member] | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  | 14 | 0 | 0
Product [Member] | Gathering and Processing [Member] | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  | 1,135 | 897 | 583
Third Party | Logistics and Storage [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total segment revenues and other income |  |  |  |  |  |  |  |  |  | 313 | 160 | 77
Third Party | Gathering and Processing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total segment revenues and other income |  |  |  |  |  |  |  |  |  | $ 3,087 | $ 2,246 | $ 1,684
[1] | Includes an impairment expense of $89 million related to one of MPLX’s equity method investments for the year ended December 31, 2016.
[2] | “Income/(loss) from equity method investments” includes the impact of any basis differential amortization or accretion.
[3] | MPLX makes a distinction between realized or unrealized gains and losses on derivatives. During the period when a derivative contract is outstanding, changes in the fair value of the derivative are recorded as an unrealized gain or loss. When a derivative contract matures or is settled, the previously recorded unrealized gain or loss is reversed and the realized gain or loss of the contract is recorded.
[4] | Within the total segment revenues and other income amounts presented above, third party revenues for the L&S segment were $313 million, $160 million and $77 million for 2018, 2017 and 2016, respectively. Third party revenues for the G&P segment were $3,087 million, $2,246 million and $1,684 million for 2018, 2017 and 2016, respectively.
[5] | See below for the reconciliation from Segment Adjusted EBITDA to “Net income.”
[6] | Includes an impairment expense of $89 million related to one of MPLX’s equity method investments for the year ended December 31, 2016.

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