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Reportable Segments Operating expenses (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |
Operating expenses(c) | $ 6,280 | $ 7,288 | $ 7,215
Operating Segments | Natural Gas Pipelines |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating expenses(c) | 4,213 | 5,218 | 5,371
Operating Segments | Products Pipelines |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating expenses(c) | 684 | 748 | 564
Operating Segments | Terminals |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating expenses(c) | 888 | 823 | 793
Operating Segments | CO2 |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating expenses(c) | 496 | 453 | 394
Operating Segments | Kinder Morgan Canada |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating expenses(c) | 0 | 72 | 95
Intersegment Eliminations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating expenses(c) | $ (1) | $ (26) | $ (2)

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