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Reportable Segments Depreciation, depletion and amortization (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |
DD&A | $ 2,261 | $ 2,209 | $ 2,309
Operating Segments | Natural Gas Pipelines |  |  |
Segment Reporting Information [Line Items] |  |  |
DD&A | 1,011 | 1,041 | 1,046
Operating Segments | CO2 |  |  |
Segment Reporting Information [Line Items] |  |  |
DD&A | 493 | 446 | 556
Operating Segments | Terminals |  |  |
Segment Reporting Information [Line Items] |  |  |
DD&A | 472 | 435 | 433
Operating Segments | Products Pipelines |  |  |
Segment Reporting Information [Line Items] |  |  |
DD&A | 216 | 221 | 206
Operating Segments | Kinder Morgan Canada |  |  |
Segment Reporting Information [Line Items] |  |  |
DD&A | 46 | 44 | 46
Corporate, Non-Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
DD&A | $ 23 | $ 22 | $ 22

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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