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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

X

- 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

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- Definition

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+ References

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