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Reportable Segments Capital expenditures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Capital expenditures	$ 1,707	$ 2,270	$ 2,904
Operating Segments | Natural Gas Pipelines
Segment Reporting Information [Line Items]
Capital expenditures	945	1,377	1,565
Operating Segments | Products Pipelines
Segment Reporting Information [Line Items]
Capital expenditures	122	175	199
Operating Segments | Terminals
Segment Reporting Information [Line Items]
Capital expenditures	433	347	386
Operating Segments | CO2
Segment Reporting Information [Line Items]
Capital expenditures	186	349	397
Operating Segments | Kinder Morgan Canada
Segment Reporting Information [Line Items]
Capital expenditures	0	0	332
Other
Segment Reporting Information [Line Items]
Capital expenditures	$ 21	$ 22	$ 25

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=121586364&loc=d3e3213-108585

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- Definition

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+ References

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