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Debt Current Portion of Debt - USD ($) $ in Millions								12 Months Ended
	Feb. 01, 2018	Jan. 15, 2018	Dec. 01, 2017	Jun. 15, 2017	Apr. 15, 2017	Apr. 01, 2017	Feb. 01, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Repayments of Debt								$ 11,064	$ 10,060	$ 15,116
KMI Senior Notes, 6.0%, due January 15, 2018 [Member] | Kinder Morgan Finance Company, LLC [Member]
Debt Instrument [Line Items]
Senior Notes, Current								$ 750
Debt Instrument, Interest Rate, Stated Percentage								6.00%
KMI Senior Notes, 7.0%, due February 1, 2018 [Member] | Kinder Morgan, Inc.
Debt Instrument [Line Items]
Senior Notes, Current								$ 82
Debt Instrument, Interest Rate, Stated Percentage								7.00%
KMP Senior notes, 5.95%, due February 15, 2018 [Member] | Kinder Morgan Energy Partners, L.P. [Member]
Debt Instrument [Line Items]
Senior Notes, Current								$ 975
Debt Instrument, Interest Rate, Stated Percentage								5.95%
KMI Senior Notes, 7.25%, due June 1, 2018 [Member] | Kinder Morgan, Inc.
Debt Instrument [Line Items]
Senior Notes, Current								$ 477
Debt Instrument, Interest Rate, Stated Percentage								7.25%
KMP Senior notes, 6.0%, due February 1, 2017 [Member] | Kinder Morgan Energy Partners, L.P. [Member]
Debt Instrument [Line Items]
Repayments of Debt							$ 600
Senior Notes, Current									$ 600
Debt Instrument, Interest Rate, Stated Percentage							6.00%		6.00%
KMP Senior notes, 7.50%, due April 1, 2017 [Member] | TGP [Member]
Debt Instrument [Line Items]
Repayments of Debt						$ 300
Senior Notes, Current									$ 300
Debt Instrument, Interest Rate, Stated Percentage						7.50%			7.50%
KMP Senior Notes, 5.95%, due April 15, 2017 [Member] | EPNG [Member]
Debt Instrument [Line Items]
Repayments of Debt					$ 355
Senior Notes, Current									$ 355
Debt Instrument, Interest Rate, Stated Percentage					5.95%				5.95%
KMI Senior Notes, 7.0%, due June 15, 2017 [Member] | Kinder Morgan, Inc.
Debt Instrument [Line Items]
Repayments of Debt				$ 786
Senior Notes, Current									$ 786
Debt Instrument, Interest Rate, Stated Percentage				7.00%					7.00%
KMI Senior Notes, 2.0%, due December 1, 2017 [Member] | Kinder Morgan, Inc.
Debt Instrument [Line Items]
Repayments of Debt			$ 500
Senior Notes, Current									$ 500
Debt Instrument, Interest Rate, Stated Percentage			2.00%						2.00%
Subsequent Event [Member] | KMI Senior Notes, 6.0%, due January 15, 2018 [Member] | Kinder Morgan Finance Company, LLC [Member]
Debt Instrument [Line Items]
Repayments of Debt		$ 750
Debt Instrument, Interest Rate, Stated Percentage		6.00%
Subsequent Event [Member] | KMI Senior Notes, 7.0%, due February 1, 2018 [Member] | Kinder Morgan, Inc.
Debt Instrument [Line Items]
Repayments of Debt	$ 82
Debt Instrument, Interest Rate, Stated Percentage	7.00%

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Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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