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CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Income Statement [Abstract]    
Equity in (loss) earnings of Kinder Morgan Energy Partners, L.P. $ (31) $ 15
Income tax (benefit) expense (7) 5
Net (Loss) Income $ (24) $ 10
(Loss) Earnings per Share, Basic and Diluted (in dollars per share) $ (0.24) $ 0.11
Number of shares used in computing Earnings per Share, Basic and Diluted (in shares) 99 93