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Pensions - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Defined Benefit Plan Disclosure [Line Items]    
Payments for repurchase of common stock $ 16.3 $ 3.6
Actuarial losses recognized 0.4  
U.S. Benefit Plans    
Defined Benefit Plan Disclosure [Line Items]    
Benefits paid 1.5 1.6
Estimated future employer contributions in current year 7.2  
Non-U.S. Benefit Plan    
Defined Benefit Plan Disclosure [Line Items]    
Benefits paid 0.4 $ 1.1
Estimated future employer contributions in current year 1.4  
Common Stock    
Defined Benefit Plan Disclosure [Line Items]    
Payments for repurchase of common stock $ 3.6