XML 66 R48.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Supplemental Cash Flow Information (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
Supplemental Cash Flow Elements [Abstract] |
Summary of Supplemental Cash Flow Information |
| Three Months Ended March 31,
(In millions) | 2018 |  | 2017
Net cash provided by operating activities included: |  |  |
Interest paid (net of amounts capitalized) | $ | 212 |  |  | $ | 157 |
Net income taxes paid to taxing authorities | 6 |  |  | 4 |
Non-cash investing and financing activities: |  |  |
Contribution of assets to joint venture(a) | — |  |  | 328 |
(a) | MarkWest’s contribution of assets to Sherwood Midstream and Sherwood Midstream Holdings. See Note 5.
Schedule of Cash and Cash Equivalents |
(In millions) | March 31, 2018 |  | December 31, 2017
Cash and cash equivalents | $ | 4,653 |  |  | $ | 3,011 |
Restricted cash(a) | 4 |  |  | 4 |
Cash, cash equivalents and restricted cash(b) | $ | 4,657 |  |  | $ | 3,015 |
(a) | The restricted cash balance is included within “Other current assets” on the consolidated balance sheets.
(b) | As a result of the adoption of ASU 2016-18, the consolidated statements of cash flows now explain the change during the period of both “Cash and cash equivalents” and “Restricted cash.”
Reconciliation of Additions to Property, Plant and Equipment to Total Capital Expenditures | The consolidated statements of cash flows exclude changes to the consolidated balance sheets that did not affect cash. The following is a reconciliation of additions to property, plant and equipment to total capital expenditures:
| Three Months Ended March 31,
(In millions) | 2018 |  | 2017
Additions to property, plant and equipment per consolidated statements of cash flows | $ | 755 |  |  | $ | 610 |
Asset retirement expenditures | 1 |  |  | 1 |
Decrease in capital accruals | (49 | ) |  | (72 | )
Total capital expenditures before acquisitions | 707 |  |  | 539 |
Acquisitions(a) | — |  |  | 220 |
Total capital expenditures | $ | 707 |  |  | $ | 759 |
(a) | The three months ended March 31, 2017 reflects the acquisition of the Ozark pipeline.

X
- Definition Schedule of Reconciliation of Additions to Property, Plant And Equipment to Total Capital Expenditures [Table Text Block] + References No definition available. + Details
Name: | mpc_ScheduleOfReconciliationOfAdditionsToPropertyPlantAndEquipmentToTotalCapitalExpendituresTableTextBlock
Namespace Prefix: | mpc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
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