Risk Management Amounts reclassified out of other comprehensive income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	$ (109)	$ 86	$ (109)	$ 86	$ 24	$ 66
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(11)	18	(11)	18	(4)	132
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	10	(29)	10	(29)	13	(30)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(110)	75	(110)	75	33	168
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax Portion Attributable To Parent	(113)	70	(169)	29
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	71	(71)	(8)	(114)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	(1)	0	(3)	1
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	18	(3)	36	(10)
Total Other Comprehensive (Loss)	(25)	(4)	(144)	(94)
Kinder Morgan Energy Partners, L.P. [Member]
Derivatives, Fair Value [Line Items]
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax Portion Attributable To Parent			(169)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent			(133)	20
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent			(7)	(114)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax			(3)	1
Total Other Comprehensive (Loss)			(143)	(93)
Kinder Morgan Energy Partners, L.P. [Member] | Amounts reclassified from AOCI [Member]
Derivatives, Fair Value [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax			36	(10)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax			0	0
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Pension And Other Postretiremen tBenefit Plans Net Of Tax Portion Attributable To Parent			0	0
Other comprehensive income reclassified from accumulated other comprehensive income, net of tax, portion attributable to parent			36	(10)
Kinder Morgan Energy Partners, L.P. [Member] | OCI before Reclassifications [Member]
Derivatives, Fair Value [Line Items]
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax Portion Attributable To Parent				30
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent			(7)	(114)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments, Net of Tax			(3)	1
Other comprehensive income (loss) before reclassifications, net of tax, portion attributable to parent			$ (179)	$ (83)