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Segment Information (Tables) | 9 Months Ended
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Sep. 30, 2019
Segment Reporting [Abstract] |
Income From Operations Attributable To Operating Segments | 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 Refining & Marketing and Retail 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 |  | Retail |  | Midstream |  | Total
Three Months Ended September 30, 2019 |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Third party(a) | $ | 21,437 |  |  | $ | 8,677 |  |  | $ | 929 |  |  | $ | 31,043 |
Intersegment | 5,100 |  |  | 2 |  |  | 1,235 |  |  | 6,337 |
Segment revenues | $ | 26,537 |  |  | $ | 8,679 |  |  | $ | 2,164 |  |  | $ | 37,380 |
Segment income from operations | $ | 883 |  |  | $ | 442 |  |  | $ | 919 |  |  | $ | 2,244 |
Supplemental Data |  |  |  |  |  |  |
Depreciation and amortization(b) | $ | 397 |  |  | $ | 113 |  |  | $ | 300 |  |  | $ | 810 |
Capital expenditures and investments(c) | 561 |  |  | 177 |  |  | 783 |  |  | 1,521 |
(In millions) | Refining & Marketing |  | Retail |  | Midstream |  | Total
Three Months Ended September 30, 2018 |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Third party(a) | $ | 16,751 |  |  | $ | 5,395 |  |  | $ | 842 |  |  | $ | 22,988 |
Intersegment | 2,931 |  |  | 1 |  |  | 787 |  |  | 3,719 |
Segment revenues | $ | 19,682 |  |  | $ | 5,396 |  |  | $ | 1,629 |  |  | $ | 26,707 |
Segment income from operations | $ | 666 |  |  | $ | 161 |  |  | $ | 679 |  |  | $ | 1,506 |
Supplemental Data |  |  |  |  |  |  |
Depreciation and amortization(b) | $ | 257 |  |  | $ | 76 |  |  | $ | 205 |  |  | $ | 538 |
Capital expenditures and investments(c) | 226 |  |  | 98 |  |  | 593 |  |  | 917 |
(In millions) | Refining & Marketing |  | Retail |  | Midstream |  | Total
Nine Months Ended September 30, 2019 |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Third party(a) | $ | 65,043 |  |  | $ | 24,997 |  |  | $ | 2,817 |  |  | $ | 92,857 |
Intersegment | 15,011 |  |  | 6 |  |  | 3,685 |  |  | 18,702 |
Segment revenues | $ | 80,054 |  |  | $ | 25,003 |  |  | $ | 6,502 |  |  | $ | 111,559 |
Segment income from operations | $ | 1,455 |  |  | $ | 1,105 |  |  | $ | 2,705 |  |  | $ | 5,265 |
Supplemental Data |  |  |  |  |  |  |
Depreciation and amortization(b) | $ | 1,235 |  |  | $ | 369 |  |  | $ | 925 |  |  | $ | 2,529 |
Capital expenditures and investments(c) | 1,385 |  |  | 370 |  |  | 2,420 |  |  | 4,175 |
(In millions) | Refining & Marketing |  | Retail |  | Midstream |  | Total
Nine Months Ended September 30, 2018 |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Third party(a) | $ | 46,635 |  |  | $ | 15,231 |  |  | $ | 2,305 |  |  | $ | 64,171 |
Intersegment | 8,181 |  |  | 4 |  |  | 2,180 |  |  | 10,365 |
Segment revenues | $ | 54,816 |  |  | $ | 15,235 |  |  | $ | 4,485 |  |  | $ | 74,536 |
Segment income from operations | $ | 1,558 |  |  | $ | 415 |  |  | $ | 1,863 |  |  | $ | 3,836 |
Supplemental Data |  |  |  |  |  |  |
Depreciation and amortization(b) | $ | 761 |  |  | $ | 228 |  |  | $ | 577 |  |  | $ | 1,566 |
Capital expenditures and investments(c) | 613 |  |  | 225 |  |  | 1,676 |  |  | 2,514 |
(a) | Includes related party sales. See Note 6 for additional information.
(b) | Differences between segment totals and MPC consolidated totals represent amounts related to corporate and other unallocated items and are included in items not allocated to segments in the reconciliation below.
(c) Capital expenditures include changes in capital accruals and investments in affiliates. See reconciliation from segment totals to MPC consolidated total capital expenditures below.
Reconciliation Of Segment Income From Operations To Income Before Income Taxes | The following reconciles segment income from operations to income before income taxes as reported in the consolidated statements of income:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(In millions) | 2019 |  | 2018 |  | 2019 |  | 2018
Segment income from operations | $ | 2,244 |  |  | $ | 1,506 |  |  | $ | 5,265 |  |  | $ | 3,836 |
Items not allocated to segments: |  |  |  |  |  |  |
Corporate and other unallocated items(a) | (198 | ) |  | (99 | ) |  | (568 | ) |  | (269 | )
Capline restructuring gain(b) | — |  |  | — |  |  | 207 |  |  | — |
Transaction-related costs(c) | (22 | ) |  | (4 | ) |  | (147 | ) |  | (14 | )
Litigation | — |  |  | — |  |  | (22 | ) |  | — |
Impairments | — |  |  | — |  |  | — |  |  | 1 |
Income from operations | 2,024 |  |  | 1,403 |  |  | 4,735 |  |  | 3,554 |
Net interest and other financial costs | 317 |  |  | 240 |  |  | 945 |  |  | 618 |
Income before income taxes | $ | 1,707 |  |  | $ | 1,163 |  |  | $ | 3,790 |  |  | $ | 2,936 |
(a) | Corporate and other unallocated items consist 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 Retail segments.
(b) | See Note 13.
(c) | The transaction-related costs recognized in the 2019 year-to-date period include the recognition of an obligation for employee benefits provided to former Andeavor employees.
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures | The following reconciles segment capital expenditures and investments to total capital expenditures:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(In millions) | 2019 |  | 2018 |  | 2019 |  | 2018
Segment capital expenditures and investments | $ | 1,521 |  |  | $ | 917 |  |  | $ | 4,175 |  |  | $ | 2,514 |
Less investments in equity method investees | 197 |  |  | 104 |  |  | 792 |  |  | 222 |
Plus items not allocated to segments: |  |  |  |  |  |  |
Corporate | 30 |  |  | 7 |  |  | 44 |  |  | 42 |
Capitalized interest | 32 |  |  | 21 |  |  | 97 |  |  | 55 |
Total capital expenditures(a) | $ | 1,386 |  |  | $ | 841 |  |  | $ | 3,524 |  |  | $ | 2,389 |
(a) 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.

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- Definition Tabular disclosure of the reconciliation of profit (loss) from reportable segments to the consolidated income (loss) before income tax expense (benefit) and discontinued operations. Includes, but is not limited to, reconciliation after income tax if income tax is allocated to the reportable segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8924-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599 + Details
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- Definition Tabular disclosure of each significant reconciling item, other than profit (loss), revenues, or assets, in the reconciliation of totals of such items in reportable segments to the entity's corresponding consolidated amount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8924-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599 + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599 + Details
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