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Reportable Segments Other expense (income) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |
Other operating expenses | $ 12 | $ 386 | $ 2,066
Operating Segments | Natural Gas Pipelines |  |  |
Segment Reporting Information [Line Items] |  |  |
Other operating expenses | 26 | 199 | 1,269
Operating Segments | CO2 |  |  |
Segment Reporting Information [Line Items] |  |  |
Other operating expenses | (1) | 19 | 606
Operating Segments | Terminals |  |  |
Segment Reporting Information [Line Items] |  |  |
Other operating expenses | (14) | 99 | 190
Operating Segments | Products Pipelines |  |  |
Segment Reporting Information [Line Items] |  |  |
Other operating expenses | 0 | 76 | 2
Operating Segments | Kinder Morgan Canada |  |  |
Segment Reporting Information [Line Items] |  |  |
Other operating expenses | 0 | 0 | (1)
Corporate, Non-Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Other operating expenses | $ 1 | $ (7) | $ 0

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- Definition The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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