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Segment Information | 3 Months Ended
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Mar. 31, 2017
Segment Reporting [Abstract] |
Segment Information | Segment Information In the first quarter of 2017, we revised our segment reporting in connection with the contribution of certain terminal, pipeline and storage assets to MPLX. The operating results for these assets are now reported in our Midstream segment. Previously they were reported as part of our Refining & Marketing segment. Comparable prior period information has been recast to reflect our revised presentation. The results for the pipeline and storage assets were recast effective January 1, 2015 and the results for the terminal assets were recast effective April 1, 2016. Prior to these dates these assets were not considered businesses and therefore there are no financial results from which to recast segment results. We have three reportable segments: Refining & Marketing; Speedway; and Midstream. Each of these segments is organized and managed based upon the nature of the products and services it offers.
• | Refining & Marketing – refines crude oil and other feedstocks at our seven refineries in the Gulf Coast and Midwest regions of the United States, purchases refined products and ethanol for resale and distributes refined products through various means, including pipeline and marine transportation, terminal and storage services provided by our Midstream segment. We sell refined products to wholesale marketing customers domestically and internationally, to buyers on the spot market, to our Speedway segment and to independent entrepreneurs who operate Marathon® retail outlets.
• | Speedway – sells transportation fuels and convenience merchandise in retail markets in the Midwest, East Coast and Southeast regions of the United States.
• | Midstream – includes the operations of MPLX and certain other related operations. The Midstream segment gathers, processes and transports natural gas; gathers, transports, fractionates, stores and markets NGLs; and transports and stores crude oil and refined products principally for the Refining & Marketing segment.
Segment income represents income from operations attributable to the reportable segments. Corporate administrative expenses, except for those attributable to MPLX, and costs related to certain non-operating assets are not allocated to the reportable segments. In addition, certain items that affect comparability (as determined by the chief operating decision maker) are not allocated to the reportable segments.
(In millions) | Refining & Marketing |  | Speedway |  | Midstream |  | Total
Three Months Ended March 31, 2017 |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Customer | $ | 11,373 |  |  | $ | 4,383 |  |  | $ | 532 |  |  | $ | 16,288 |
Intersegment(a) | 2,590 |  |  | 1 |  |  | 344 |  |  | 2,935 |
Segment revenues | $ | 13,963 |  |  | $ | 4,384 |  |  | $ | 876 |  |  | $ | 19,223 |
Segment income (loss) from operations(b) | $ | (70 | ) |  | $ | 135 |  |  | $ | 309 |  |  | $ | 374 |
Income from equity method investments | 2 |  |  | 13 |  |  | 42 |  |  | 57 |
Depreciation and amortization(c) | 267 |  |  | 64 |  |  | 191 |  |  | 522 |
Capital expenditures and investments(d)(e) | 192 |  |  | 35 |  |  | 1,070 |  |  | 1,297 |
(In millions) | Refining & Marketing |  | Speedway |  | Midstream |  | Total
Three Months Ended March 31, 2016 |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Customer | $ | 8,406 |  |  | $ | 3,950 |  |  | $ | 399 |  |  | $ | 12,755 |
Intersegment(a) | 2,165 |  |  | 1 |  |  | 232 |  |  | 2,398 |
Segment revenues | $ | 10,571 |  |  | $ | 3,951 |  |  | $ | 631 |  |  | $ | 15,153 |
Segment income (loss) from operations(b) | $ | (86 | ) |  | $ | 167 |  |  | $ | 189 |  |  | $ | 270 |
Income (loss) from equity method investments | (1 | ) |  | — |  |  | 23 |  |  | 22 |
Depreciation and amortization(c) | 273 |  |  | 63 |  |  | 140 |  |  | 476 |
Capital expenditures and investments(d) | 243 |  |  | 50 |  |  | 350 |  |  | 643 |
(a) | Management believes intersegment transactions were conducted under terms comparable to those with unaffiliated parties.
(b) | Corporate overhead expenses attributable to MPLX are included in the Midstream segment. Corporate overhead expenses are not allocated to the Refining & Marketing and Speedway segments.
(c) | Differences between segment totals and MPC totals represent amounts related to unallocated items and are included in “Items not allocated to segments” in the reconciliation below.
(d) | Capital expenditures include changes in capital accruals, acquisitions (including any goodwill) and investments in affiliates.
(e) | In the first quarter of 2017, t he Midstream segment includes $220 million for the acquisition of the Ozark pipeline and an investment of $500 million in MarEn Bakken related to the Bakken Pipeline system.
The following reconciles segment income from operations to income before income taxes as reported in the consolidated statements of income:
| Three Months Ended March 31,
(In millions) | 2017 |  | 2016
Segment income from operations | $ | 374 |  |  | $ | 270 |
Items not allocated to segments: |  |  |
Corporate and other unallocated items(a) | (82 | ) |  | (65 | )
Pension settlement expenses | — |  |  | (1 | )
Impairments(b) | — |  |  | (129 | )
Net interest and other financial income (costs) | (150 | ) |  | (142 | )
Income (loss) before income taxes | $ | 142 |  |  | $ | (67 | )
(a) | Corporate and other unallocated items consists primarily of MPC’s corporate administrative expenses and costs related to certain non-operating assets, except for corporate overhead expenses attributable to MPLX, which are included in the Midstream segment. Corporate overhead expenses are not allocated to the Refining & Marketing and Speedway segments.
(b) | See Note 14 for further information on the impairment of goodwill in the three months ended March 31, 2016.
The following reconciles segment capital expenditures and investments to total capital expenditures:
| Three Months Ended March 31,
(In millions) | 2017 |  | 2016
Segment capital expenditures and investments | $ | 1,297 |  |  | $ | 643 |
Less investments in equity method investees(a) | 566 |  |  | 209 |
Plus items not allocated to segments: |  |  |
Corporate and Other | 16 |  |  | 24 |
Capitalized interest | 12 |  |  | 17 |
Total capital expenditures(b) | $ | 759 |  |  | $ | 475 |
(a) | The three months ended March 31, 2017 includes an investment of $500 million in MarEn Bakken related to the Bakken Pipeline system. The three months ended March 31, 2016 includes an adjustment of $143 million to the fair value of equity method investments acquired in connection with the MarkWest Merger.
(b) | Capital expenditures include changes in capital accruals. See Note 17 for a reconciliation of total capital expenditures to additions to property, plant and equipment as reported in the consolidated statements of cash flows.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8981-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8971-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8595-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8380-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8984-108599 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9031-108599 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9054-108599 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8538-108599 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8864-108599 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8924-108599 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 + Details
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