Consolidated Statements of Shareholders' Equity Statement (USD $) In Millions, except Share data	Total	Common Stock [Member] Voting Shares [Member]	Common Stock [Member] Listed Shares [Member]	Retained Deficit [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Shareholders' Equity, Total [Member]	KMI drop-down with KMP [Member] Common Stock [Member] Listed Shares [Member]	KMP Acquisition of Copano [Member] Common Stock [Member] Listed Shares [Member]
Total Shareholders' Equity at Dec. 31, 2011		$ 0	$ 3,760	$ (1,256)	$ 0
Shareholders' Equity (in shares) at Dec. 31, 2011		2	98,509,389
Shares distributions (in shares)		0	4,646,736
Share distributions		0	347	(347)
Stock Issued During Period, Shares, New Issues			10,120,000
Stock Issued During Period, Value, New Issues			727
Tax impact of KMI drop-down to KMP							235	0
Net income (loss)	(63)			(63)
Change in fair value of derivatives utilized for hedging purposes	11				11
Reclassification of change in fair value of derivatives to net income	1				1
Foreign currency translation adjustments					7
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	0				0
Total Shareholders' Equity at Sep. 30, 2012		0	5,069	(1,666)	19	3,422
Shareholders' Equity (in shares) at Sep. 30, 2012		2	113,276,125			113,276,127
Total Shareholders' Equity at Dec. 31, 2012	3,464	0	5,201	(1,755)	18
Shareholders' Equity (in shares) at Dec. 31, 2012		3	115,118,335
Shares distributions (in shares)		1	5,411,719
Share distributions		0	449	(449)
Stock Issued During Period, Shares, New Issues	1,757,300		1,757,300
Stock Issued During Period, Value, New Issues			145
Tax impact of KMI drop-down to KMP	(89)						26	63
Net income (loss)	191			191
Change in fair value of derivatives utilized for hedging purposes	(8)				(8)
Reclassification of change in fair value of derivatives to net income	2				2
Foreign currency translation adjustments					(8)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	3				3
Total Shareholders' Equity at Sep. 30, 2013	$ 3,878	$ 0	$ 5,884	$ (2,013)	$ 7	$ 3,878
Shareholders' Equity (in shares) at Sep. 30, 2013		4	122,287,354			122,287,358