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Commitments and Contingencies (Details Textual) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Sep. 30, 2012
Dec. 31, 2009
ITT
Loss Contingencies      
Bonds Issued     $ 500
Interest Rate     6.125%
Estimated environmental matters 15 12  
Disclosed rent expense $ 64