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Operating Segments - Segment Financial Data (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) segment | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Operating Segments |  |  |  |  |  |  |  |  |  |  |
Operating segments number | segment |  |  |  |  |  |  |  |  | 3 |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues | $ 5,963 | $ 5,833 | $ 3,225 | $ 8,269 | $ 9,154 | $ 7,886 | $ 8,253 | $ 8,375 | $ 23,290 | $ 33,669 | $ 34,055
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Equity earnings in unconsolidated entities |  |  |  |  |  |  |  |  | 355 | 388 | 375
Segment Adjusted EBITDA |  |  |  |  |  |  |  |  | 2,557 | 3,230 | 2,681
Investment and acquisition capital |  |  |  |  |  |  |  |  | 1,231 | 1,387 | 1,888
Maintenance capital |  |  |  |  |  |  |  |  | 216 | 287 | 252
Total assets | 25,951 |  |  |  | 29,969 |  |  |  | 25,951 | 29,969 | 26,830
Investments in unconsolidated entities | 3,764 |  |  |  | 3,683 |  |  |  | 3,764 | 3,683 | 2,702
Transportation |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 610 | 788 | 648
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Equity earnings in unconsolidated entities |  |  |  |  |  |  |  |  | 350 | 388 | 375
Segment Adjusted EBITDA |  |  |  |  |  |  |  |  | 1,616 | 1,722 | 1,508
Investment and acquisition capital |  |  |  |  |  |  |  |  | 981 | 1,127 | 1,631
Maintenance capital |  |  |  |  |  |  |  |  | 136 | 161 | 139
Total assets | 14,416 |  |  |  | 15,549 |  |  |  | 14,416 | 15,549 | 13,947
Investments in unconsolidated entities | 3,642 |  |  |  | 3,557 |  |  |  | 3,642 | 3,557 | 2,594
Facilities |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 622 | 609 | 588
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Equity earnings in unconsolidated entities |  |  |  |  |  |  |  |  | 5 | 0 | 0
Segment Adjusted EBITDA |  |  |  |  |  |  |  |  | 731 | 705 | 711
Investment and acquisition capital |  |  |  |  |  |  |  |  | 173 | 227 | 234
Maintenance capital |  |  |  |  |  |  |  |  | 51 | 97 | 100
Total assets | 6,165 |  |  |  | 7,593 |  |  |  | 6,165 | 7,593 | 7,464
Investments in unconsolidated entities | 122 |  |  |  | 126 |  |  |  | 122 | 126 | 108
Supply and Logistics |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 22,058 | 32,272 | 32,819
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Segment Adjusted EBITDA |  |  |  |  |  |  |  |  | 210 | 803 | 462
Investment and acquisition capital |  |  |  |  |  |  |  |  | 77 | 33 | 23
Maintenance capital |  |  |  |  |  |  |  |  | 29 | 29 | 13
Total assets | 5,370 |  |  |  | 6,827 |  |  |  | 5,370 | 6,827 | 5,419
Investments in unconsolidated entities | $ 0 |  |  |  | $ 0 |  |  |  | 0 | 0 | 0
Operating Segments Excluding Intersegment Elimination | Transportation |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 1,016 | 1,259 | 1,116
Operating Segments Excluding Intersegment Elimination | Facilities |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 622 | 609 | 588
Operating Segments Excluding Intersegment Elimination | Supply and Logistics |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 22,058 | 32,272 | 32,819
Intersegment |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | (1,927) | (2,098) | (1,918)
Intersegment | Transportation |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | (1,004) | (1,061) | (874)
Intersegment | Facilities |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | (516) | (562) | (573)
Intersegment | Supply and Logistics |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | (1) | (4) | (3)
Intersegment Adjustment |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | (406) | (471) | (468)
Operating Segments |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 25,217 | 35,767 | 35,973
Operating Segments | Transportation |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 2,020 | 2,320 | 1,990
Operating Segments | Facilities |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 1,138 | 1,171 | 1,161
Operating Segments | Supply and Logistics |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | $ 22,059 | $ 32,276 | $ 32,822

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