v2.4.0.6

General Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Income from Continuing Operations	$ 658	$ 305
Net Income (loss) attributable to KMI	292	21
Net Income (Loss) Attributable to Noncontrolling Interest	364	(94)
Less: income from continuing operations attributable to noncontrolling interests		144
Income from continuing operations attributable to KMI		161
Income from continuing operations attributable to shareholders		161
Dividends declared during the period		(220)
Remaining (excess) undistributed earnings		(59)
Remaining (excess) undistributed earnings		(199)
Net (loss) income attributable to shareholders		21
Class P [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Income from continuing operations attributable to shareholders		40
Dividends declared during the period		54
Remaining (excess) undistributed earnings		(14)
Remaining (excess) undistributed earnings		(48)
Net (loss) income attributable to shareholders		6
Basic weighted average number of shares outstanding (in shares)	1,036	171
Basic earnings per common share from continuing operations (in dollars per share)	$ 0.28	$ 0.23
Income from continuing operations attributable to shareholders and assumed conversions		161
Basic earnings per common share (usd per share)	$ 0.28	$ 0.03
Net income attributable to shareholders and assumed conversions(c)		21
Diluted weighted average number of shares (in shares)	1,038	708
Diluted loss per common share (usd per share)		$ 0.03
Diluted earnings per common share from continuing operations (in dollars per share)		$ 0.23
Common Class A [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Income from continuing operations attributable to shareholders		109
Dividends declared during the period		154
Remaining (excess) undistributed earnings		(45)
Remaining (excess) undistributed earnings		(151)
Net (loss) income attributable to shareholders		3
Basic weighted average number of shares outstanding (in shares)		536
Basic earnings per common share from continuing operations (in dollars per share)		$ 0.21
Income from continuing operations attributable to shareholders and assumed conversions		109
Basic earnings per common share (usd per share)		$ 0.01
Net income attributable to shareholders and assumed conversions(c)		3
Diluted weighted average number of shares (in shares)		536
Diluted loss per common share (usd per share)		$ 0.01
Diluted earnings per common share from continuing operations (in dollars per share)		$ 0.21
Participating Securities [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Income from continuing operations attributable to shareholders		12
Dividends declared during the period		12
Remaining (excess) undistributed earnings		0
Remaining (excess) undistributed earnings		0
Net (loss) income attributable to shareholders		$ 12

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