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Reportable Segments Other expense (income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Other expense (income)(c)	$ 164	$ 12	$ 386
Operating Segments | Natural Gas Pipelines
Segment Reporting Information [Line Items]
Other expense (income)(c)	593	26	199
Operating Segments | Products Pipelines
Segment Reporting Information [Line Items]
Other expense (income)(c)	34	0	76
Operating Segments | Terminals
Segment Reporting Information [Line Items]
Other expense (income)(c)	54	(14)	99
Operating Segments | CO2
Segment Reporting Information [Line Items]
Other expense (income)(c)	79	(1)	19
Operating Segments | Kinder Morgan Canada
Segment Reporting Information [Line Items]
Other expense (income)(c)	(596)	0	0
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Other expense (income)(c)	$ 0	$ 1	$ (7)

X

- 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

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+ References

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