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Operating Segments - Segment Financial Data (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2016 USD ($) segment | Jun. 30, 2015 USD ($)
Operating Segments |  |  |  |
Operating segments number | segment |  |  | 3 |
Revenues: |  |  |  |
Total revenues | $ 4,950 | $ 6,663 | $ 9,060 | $ 12,605
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments |  |  |  |
Equity earnings in unconsolidated entities | 40 | 52 | 87 | 89
Segment profit/(loss) | 390 | 371 | 833 | 884
Maintenance capital | 35 | 52 | 81 | 102
Transportation |  |  |  |
Revenues: |  |  |  |
Total revenues | 170 | 180 | 323 | 366
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments |  |  |  |
Equity earnings in unconsolidated entities | 40 | 52 | 87 | 89
Segment profit/(loss) | 252 | 186 | 499 | 428
Maintenance capital | 23 | 33 | 57 | 66
Facilities |  |  |  |
Revenues: |  |  |  |
Total revenues | 132 | 137 | 270 | 261
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments |  |  |  |
Segment profit/(loss) | 156 | 144 | 315 | 285
Maintenance capital | 9 | 17 | 18 | 32
Supply and Logistics |  |  |  |
Revenues: |  |  |  |
Total revenues | 4,648 | 6,346 | 8,467 | 11,978
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments |  |  |  |
Segment profit/(loss) | (18) | 41 | 19 | 171
Interest expense related to hedged inventory purchases | 3 | 2 | 6 | 3
Maintenance capital | 3 | 2 | 6 | 4
Operating Segments |  |  |  |
Revenues: |  |  |  |
Total revenues | 5,325 | 7,022 | 9,795 | 13,312
Operating Segments | Transportation |  |  |  |
Revenues: |  |  |  |
Total revenues | 403 | 402 | 787 | 803
Operating Segments | Facilities |  |  |  |
Revenues: |  |  |  |
Total revenues | 270 | 269 | 535 | 525
Operating Segments | Supply and Logistics |  |  |  |
Revenues: |  |  |  |
Total revenues | 4,652 | 6,351 | 8,473 | 11,984
Intersegment |  |  |  |
Revenues: |  |  |  |
Total revenues | (375) | (359) | (735) | (707)
Intersegment | Transportation |  |  |  |
Revenues: |  |  |  |
Total revenues | (233) | (222) | (464) | (437)
Intersegment | Facilities |  |  |  |
Revenues: |  |  |  |
Total revenues | (138) | (132) | (265) | (264)
Intersegment | Supply and Logistics |  |  |  |
Revenues: |  |  |  |
Total revenues | $ (4) | $ (5) | $ (6) | $ (6)

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