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Goodwill and Other Intangible Assets, Net - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Trademarks [Member]
Bornemann [Member]
Dec. 31, 2011
Customer relationships [Member]
Dec. 31, 2012
Customer relationships [Member]
Bornemann [Member]
Dec. 31, 2011
Proprietary technology [Member]
Dec. 31, 2012
Proprietary technology [Member]
Bornemann [Member]
Dec. 31, 2011
Patents and other [Member]
Nov. 13, 2012
Shape Cutting Businesses [Member]
Dec. 31, 2011
Exelis [Member]
Dec. 31, 2011
Xylem [Member]
Finite-Lived Intangible Assets [Line Items]                        
Goodwill disposed off                   $ 12.9 $ 2,155.7 $ 1,617.2
Intangible assets acquired       11.4   17.6   17.1        
Weighted average period (in years)         13 years 8 months 12 days 9 years 7 months 6 days 13 years 6 months 12 years 2 months 12 days 2 years 8 months 12 days      
Amortization expense related to finite-lived intangible assets $ 10.2 $ 8.7 $ 6.3