XML 63 R104.htm IDEA: XBRL DOCUMENT
v3.19.3

Supplemental Cash Flow Information - Reconciliation of Additions to Property, Plant and Equipment to Total Capital Expenditures (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Supplemental Cash Flow Elements [Abstract] |  |  |  |  |
Additions to property, plant and equipment per the consolidated statements of cash flows |  |  |  | $ 3,823 | $ 2,315
Asset retirement expenditures |  |  |  | 1 | 7
Increase (decrease) in capital accruals |  |  |  | (300) | 67
Capital expenditures | [1] | $ 1,386 | $ 841 | $ 3,524 | $ 2,389
[1] | Capital expenditures include changes in capital accruals. See Note 19 for a reconciliation of total capital expenditures to additions to property, plant and equipment for the nine months ended September 30, 2019 and 2018 as reported in the consolidated statements of cash flows.

X
- Definition Capital expenditures + References No definition available. + Details
Name: | mpc_CapitalExpenditure
Namespace Prefix: | mpc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Increase (decrease) during the period in the accrual for capital expenditures + References No definition available. + Details
Name: | mpc_IncreaseDecreaseInAccrualForCapitalExpenditures
Namespace Prefix: | mpc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Expenditures incurred through the retirement of assets. + References No definition available. + Details
Name: | mpc_RetirementExpenditures
Namespace Prefix: | mpc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SupplementalCashFlowElementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration