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Summary of Changes in Projected Benefit Obligation (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
U.S. Benefit Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation, beginning of year $ 174.3 $ 186.3  
Service cost 0.0 0.0 $ 0.0
Interest cost 7.8 7.6 7.9
Actuarial loss (gain) 7.7 (10.0)  
Benefits and expenses paid (9.2) (9.6)  
Foreign currency translation 0.0 0.0  
Benefit obligation, end of year 180.6 174.3 186.3
Accumulated benefit obligation, end of year 180.6 173.5  
Non-U.S. Benefit Plan      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation, beginning of year 55.7 62.7  
Service cost 0.2 0.2 0.2
Interest cost 1.8 2.1 2.6
Actuarial loss (gain) 7.8 (2.5)  
Benefits and expenses paid (4.2) (3.5)  
Foreign currency translation (9.6) (3.3)  
Benefit obligation, end of year 51.7 55.7 $ 62.7
Accumulated benefit obligation, end of year $ 51.7 $ 55.7