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Reportable Segments Capital expenditures (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | $ 2,904 | $ 3,188 | $ 2,882
Operating Segments | Natural Gas Pipelines |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 1,620 | 1,376 | 1,227
Operating Segments | Products Pipelines |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 150 | 127 | 244
Operating Segments | Terminals |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 380 | 888 | 983
Operating Segments | CO2 |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 397 | 436 | 276
Operating Segments | Kinder Morgan Canada |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 332 | 338 | 124
Corporate, Non-Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | $ 25 | $ 23 | $ 28

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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
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