XML 80 R66.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions | Mar. 31, 2017 | Dec. 31, 2016 | May 01, 2016 | Sep. 30, 2015
--- | --- | --- | --- | ---
Related Party Transaction [Line Items] |  |  |  |
Due from related parties, noncurrent | $ 1 | $ 1 |  |
Crowley Blue Water Partners |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 50.00% |  |  |
Crowley Ocean Partners |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 50.00% |  | 50.00% | 50.00%
Explorer |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 25.00% |  |  |
Illinois Extension Pipeline |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 35.00% |  |  |
LOCAP |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 59.00% |  |  |
LOOP |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 51.00% |  |  |
MarkWest Utica EMG |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 56.00% |  |  |
Ohio Condensate |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 60.00% |  |  |
Ohio Gathering |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 34.00% |  |  |
PFJ Southeast |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 29.00% |  |  |
Sherwood Midstream |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 50.00% |  |  |
Sherwood Midstream Holdings |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 90.00% |  |  |
TAAE |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 45.00% |  |  |
TACE |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 61.00% |  |  |
TAME |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investments, ownership percentage | 67.00% |  |  |

X
- Definition Aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due after one year (or one business cycle). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.11) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
Name: | us-gaap_DueFromRelatedPartiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_CrowleyBlueWaterPartnersLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_CrowleyOceanPartnersLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_ExplorerPipelineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_IllinoisExtensionPipelineCompanyLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_LocapLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_LoopLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_MarkWestUticaEMGMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_OhioCondensateCompanyLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_OhioGatheringCompanyLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_PFJSoutheastLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_SherwoodMidstreamLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_SherwoodMidstreamHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_AndersonsAlbionEthanolLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_AndersonsClymersEthanolLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mpc_AndersonsMarathonEthanolLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |