Related Party (Details) (USD $) In Billions, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Aug. 01, 2012 El Paso Natural Gas Company [Member]	Mar. 01, 2013 El Paso Natural Gas Company and El Paso Midstream Investment Company LLC [Member]	Aug. 01, 2012 El Paso Natural Gas Company and El Paso Midstream Investment Company LLC [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage		50.00%	50.00%	50.00%
Subsidiary debt indemnified by KMI	$ 5.9

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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