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Separation Costs (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Separation Costs [Abstract]        
Rebranding and marketing costs $ 2 $ 3 $ 6 $ 4
Advisory fees and other 1 9 6 18
Information and technology costs 0 10 1 17
Employee Retention And Hiring Costs 0 4 1 8
Lease termination and other real estate costs 0 10 0 10
Non-cash asset impairments 0 [1] 8 [1] 0 [1] 8 [1]
Other 1 2 1 2
Total separation costs in operating income 4 46 15 67
Tax-related separation (benefit) costs 0 [2] 9 [2] 0 [2] (5) [2]
Income tax (benefit) expense (1) (12) (4) (18)
Total separation costs, net of tax 3 25 11 54
Segment Reporting Information        
Asset Impairment Charges     4 2
Applied Water
        
Segment Reporting Information        
Asset Impairment Charges   $ 8    
[1] During the third quarter of 2011, we recorded an impairment charge of $8 million on one of our facilities in China within our Applied Water segment. Prior to the Spin-off, this was a shared facility among certain Xylem and ITT businesses and in connection with the separation, the removal of certain ITT operations triggered an impairment evaluation. The fair value of the applicable assets was calculated using the cost approach.
[2] In the third quarter of 2011, we revised our estimate of certain tax-related separation costs to be incurred. This adjustment resulted in a $9 million net credit (income) for tax-related separation costs during the third quarter of 2011.