Partners Capital Changes in Partners Capital (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	12 Months Ended			0 Months Ended	1 Months Ended		9 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended	0 Months Ended		12 Months Ended	0 Months Ended	12 Months Ended						12 Months Ended			0 Months Ended	12 Months Ended
	Mar. 03, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 03, 2013 KMI Asset Drop Down [Member]	May 31, 2013 KMI Asset Drop Down [Member]	Aug. 31, 2012 KMI Asset Drop Down [Member]	Sep. 30, 2012 KMI Asset Drop Down [Member]	Dec. 31, 2013 KMI Asset Drop Down [Member]	Dec. 31, 2013 Common Unit [Member] KMI Asset Drop Down [Member]	Aug. 06, 2012 Common Units [Member] KMI Asset Drop Down [Member]	Dec. 31, 2013 Common Units [Member] KMI Asset Drop Down [Member]	Mar. 03, 2013 General Partner [Member]	Dec. 31, 2013 General Partner [Member]	Dec. 31, 2013 General Partner [Member] KMI Asset Drop Down [Member]	Mar. 03, 2013 Noncontrolling Interest [Member]	Dec. 31, 2013 Noncontrolling Interest [Member] KMI Asset Drop Down [Member]	Dec. 31, 2013 Common Units [Member]	Dec. 31, 2012 Common Units [Member]	Dec. 31, 2011 Common Units [Member]	Mar. 01, 2013 Common Units [Member]	Feb. 28, 2013 Common Units [Member]	Dec. 31, 2013 i-units [Member]	Dec. 31, 2012 i-units [Member]	Dec. 31, 2011 i-units [Member]	Aug. 06, 2012 Kinder Morgan Energy Partners, L.P. [Member] Common Units [Member] KMI Asset Drop Down [Member]	Dec. 31, 2013 Settlements subsequent to period [Member] Kinder Morgan Energy Partners, L.P. [Member]	Dec. 31, 2012 Equity distribution agreement [Member] Kinder Morgan Energy Partners, L.P. [Member]	Dec. 31, 2013 Equity distribution agreement [Member] Settlements subsequent to period [Member] Kinder Morgan Energy Partners, L.P. [Member]
Limited Partners' Capital Account [Line Items]
Limited Partners' Capital Account, Units Issued																		10,814,474			1,249,452	4,600,000	2,640,196
Business Acquisition, Cost of Acquired Entity, Cash Paid					$ 994	$ 6	$ 3,000	$ 3,465
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' Capital Account, Distributions		(3,209)	(2,560)	(2,243)														(1,487)	(1,162)	(1,030)			0	0	0
Comprehensive income		3,146	1,548	1,447					1
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares										4,667,575	4,667,575
Stock Issued During Period, Value, Acquisitions										381		381														400
Increase (Decrease) in Partners' Capital	$ 1,067								$ 3,631				$ 1,057		$ 3,594	$ 10	$ 36
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners														1.0101%
Noncontrolling Interest, Shares or Equity Units Issued																											198,110	6,932,576	76,100