Partners Capital Equity Issuances (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended		2 Months Ended	3 Months Ended		3 Months Ended
	May 03, 2013	Mar. 31, 2013	Mar. 31, 2014 i-units [Member]	Feb. 24, 2014 Common Unit [Member]	Mar. 31, 2014 Common Unit [Member]	Feb. 17, 2014 Common Unit [Member]	Mar. 31, 2014 UBS [Member] Common Unit [Member]	Mar. 31, 2014 Kinder Morgan Management, LLC [Member] UBS [Member] i-units [Member]
Limited Partners' Capital Account [Line Items]
Amount Of Incentive Distribution Waived As Result Of Copano Acquisition Declared For Period	$ 30
Amount Of Incentive Distribution Waived As Result Of Copano Acquisition	25
Amount Of Incentive Distribution Waived As Result Of Kinderhawk Acquisition		7
Units issued for cash, Units					7,935,000
Proceeds from Issuance or Sale of Equity			$ 6	$ 603	$ 16
Stock Issued During Period, Shares, Issued for Cash							198,110	76,100
Sale of Stock, Price Per Share						$ 78.32