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Reportable Segments Other, net-income(expense) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |
Other, net | $ 56 | $ 75 | $ 107
Operating Segments | Natural Gas Pipelines |  |  |
Segment Reporting Information [Line Items] |  |  |
Other, net | 11 | 53 | 39
Operating Segments | Products Pipelines |  |  |
Segment Reporting Information [Line Items] |  |  |
Other, net | 1 | 6 | 2
Operating Segments | Terminals |  |  |
Segment Reporting Information [Line Items] |  |  |
Other, net | 13 | (5) | 3
Operating Segments | Kinder Morgan Canada |  |  |
Segment Reporting Information [Line Items] |  |  |
Other, net | 0 | 0 | 26
Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Other, net | $ 31 | $ 21 | $ 37

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- Definition Amount of income (expense) related to nonoperating activities, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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