Risk Management Interest Rate Risk Managment (Details) (Kinder Morgan Energy Partners, L.P. [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
	Feb. 28, 2014	Jun. 30, 2014 2.65% Senior Notes due February 1, 2019 [Member]	Jun. 30, 2014 fixed-to-variable interest rate swap agreement [Member]	Feb. 28, 2014 fixed-to-variable interest rate swap agreement [Member]	Dec. 31, 2013 fixed-to-variable interest rate swap agreement [Member]
Derivative [Line Items]
Derivative, Notional Amount			$ 5,175	$ 500	$ 4,675
Number of Fixed-to-Variable Interest Rate Swap Agreements Entered Into	4
Debt Instrument, Interest Rate, Stated Percentage		3.50%