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Reportable Segments Assets (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Assets at December 31	$ 78,866	$ 79,055
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Assets at December 31	5,664	3,382
Operating Segments | Natural Gas Pipelines
Segment Reporting Information [Line Items]
Assets at December 31	51,562	51,173
Operating Segments | Products Pipelines
Segment Reporting Information [Line Items]
Assets at December 31	8,429	8,539
Operating Segments | Terminals
Segment Reporting Information [Line Items]
Assets at December 31	9,283	9,935
Operating Segments | CO2
Segment Reporting Information [Line Items]
Assets at December 31	3,928	3,946
Operating Segments | Kinder Morgan Canada
Segment Reporting Information [Line Items]
Assets at December 31	$ 0	$ 2,080

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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+ References

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