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Goodwill and Other Identifiable Intangible Assets - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Amortization and Impairment      
Goodwill, Impairment Loss $ 515.2    
Accumulated goodwill impairment losses 715.7 $ 200.5  
Amortization 121.4 114.0 $ 134.1
Impairment charges, related to trade names   $ 0.0  
Valves And Controls [Member]      
Amortization and Impairment      
Goodwill, Impairment Loss 515.2    
Impairment charges, related to trade names 39.5    
Technical Solutions      
Amortization and Impairment      
Goodwill, Impairment Loss $ 0.0    
Impairment charges, related to trade names     $ 11.0