Consolidated Statement of Stockholder's Equity Statement (USD $) In Millions, except Share data		Total USD ($)		Common Stock [Member] USD ($)	Additional Paid-in Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	Kinder Morgan, Inc. [Member] USD ($)	Noncontrolling Interest [Member] USD ($)	EP Trust I Preffered [Member] Additional Paid-in Capital [Member]	Kinder Morgan Energy Partners, L.P. [Member] USD ($)
Stockholders' Equity Attributable to Parent at Dec. 31, 2011				$ 8	$ 3,431	$ (3)	$ (115)	$ 3,321
Noncontrolling interests at Dec. 31, 2011									5,247
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2011		8,568
Stock Issued During Period, Value, Acquisitions		10,601		3	10,598			10,601
Issuance of warrants for EP acquisition		863			863			863
Acquisition of EP non-controlling interests		3,797						0	3,797
Impact of subidiary equity transactions		(12)			19			19	(31)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		(316)				(105)		(105)
Net Income (Loss) Attributable to Noncontrolling Interest		(211)							(211)
Partners' Capital Account, Distributions		(513)						0	(513)
Partners' Capital Account, Contributions		586						0	586
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		73					73	73
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest		95							95
Amortization of restricted shares		6			6			6
Payments for Repurchase of Warrants		(110)			(110)			(110)
Stockholders' Equity, Other		(2)				(2)		(2)
Payments of Ordinary Dividends, Common Stock		(446)				(446)		(446)
Total other comprehensive loss		168
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2012		23,190
Noncontrolling interests at Jun. 30, 2012									8,970
Stockholders' Equity Attributable to Parent at Jun. 30, 2012				11	14,807	(556)	(42)	14,220
Stockholders' Equity Attributable to Parent at Dec. 31, 2012		13,866	[1]	10	14,917	(943)	(118)	13,866
Noncontrolling interests at Dec. 31, 2012		10,234	[1]						10,234		3,270
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2012	[1]	24,100
Impact of subidiary equity transactions		(85)			146			146	(231)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		1,437				569		569
Net Income (Loss) Attributable to Noncontrolling Interest		868							868
Partners' Capital Account, Distributions		(761)						0	(761)
Partners' Capital Account, Contributions		4,810						0	4,810
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		(30)					(30)	(30)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest		(35)							(35)
Amortization of restricted shares		10			10			10
Payments for Repurchase of Warrants		(131)			(131)			(131)
Proceeds from Warrant Exercises		1			1			1
Stock Issued During Period, Shares, Conversion of Convertible Securities		2,000,000						2,000,000		2,000,000
Payments of Ordinary Dividends, Common Stock		(779)				(779)		(779)
Total other comprehensive loss		(65)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2013		28,539
Noncontrolling interests at Jun. 30, 2013		14,885							14,885		7,590
Stockholders' Equity Attributable to Parent at Jun. 30, 2013		$ 13,654		$ 10	$ 14,945	$ (1,153)	$ (148)	$ 13,654

[1] (a)Retrospectively adjusted as discussed in Note 2.