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Reportable Segments Assets (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Assets at December 31	$ 79,055	$ 80,305
Assets held for sale	0	78
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Assets at December 31	3,382	6,108
Operating Segments | Natural Gas Pipelines
Segment Reporting Information [Line Items]
Assets at December 31	51,173	50,428
Operating Segments | CO2
Segment Reporting Information [Line Items]
Assets at December 31	3,946	4,065
Operating Segments | Terminals
Segment Reporting Information [Line Items]
Assets at December 31	9,935	9,725
Operating Segments | Products Pipelines
Segment Reporting Information [Line Items]
Assets at December 31	8,539	8,329
Operating Segments | Kinder Morgan Canada
Segment Reporting Information [Line Items]
Assets at December 31	$ 2,080	$ 1,572

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
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