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Summary of Changes in Projected Benefit Obligation (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
U.S. Benefit Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation, beginning of year $ 186.3 $ 159.3  
Service cost 0.0 0.0 $ 0.0
Interest cost 7.6 7.9 7.3
Actuarial (gain) loss (10.0) 28.6  
Benefits and expenses paid (9.6) (9.5)  
Foreign currency translation 0.0 0.0  
Benefit obligation, end of year 174.3 186.3 159.3
Accumulated benefit obligation, end of year 173.5 184.4  
Non-U.S. Benefit Plan      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation, beginning of year 62.7 59.9  
Service cost 0.2 0.2 0.2
Interest cost 2.1 2.6 2.5
Actuarial (gain) loss (2.5) 7.0  
Benefits and expenses paid (3.5) (3.1)  
Foreign currency translation (3.3) (3.9)  
Benefit obligation, end of year 55.7 62.7 $ 59.9
Accumulated benefit obligation, end of year $ 55.7 $ 62.7