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Reportable Segments Other, net-income(expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Other, net	$ 107	$ 97	$ 78
Operating Segments | Natural Gas Pipelines
Segment Reporting Information [Line Items]
Other, net	37	49	19
Operating Segments | Products Pipelines
Segment Reporting Information [Line Items]
Other, net	3	(1)	2
Operating Segments | Terminals
Segment Reporting Information [Line Items]
Other, net	2	8	4
Operating Segments | Kinder Morgan Canada
Segment Reporting Information [Line Items]
Other, net	26	25	15
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Other, net	$ 39	$ 16	$ 38

X

- 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=115205541&loc=SL114868664-224227

+ Details

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- Definition

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+ References

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