| Summary Of Property, Plant And Equipment |
| | | | | | | | | (In millions) | March 31,
2018 | | December 31,
2017 | Refining & Marketing(a) | $ | 18,117 |
| | $ | 19,490 |
| Speedway | 5,359 |
| | 5,358 |
| Midstream(a) | 16,889 |
| | 14,898 |
| Corporate and Other | 811 |
| | 792 |
| Total | 41,176 |
| | 40,538 |
| Less accumulated depreciation | 14,558 |
| | 14,095 |
| Property, plant and equipment, net | $ | 26,618 |
| | $ | 26,443 |
|
| | (a) | On February 1, 2018, we contributed certain refining logistics assets and fuels distribution services to MPLX. In connection with this transaction, approximately $830 million of net property, plant and equipment was recorded to the Midstream segment with an offsetting reduction to the Refining & Marketing segment. |
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