v3.7.0.1
Net periodic Benefit Cost (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
U.S. [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost     $ 0.1
Interest cost $ 1.3 $ 1.3 0.8
Expected return on plan assets (1.4) (1.6) (1.0)
Amortization of net actuarial gain (loss) 0.1    
Effect of settlement 0.1 0.4  
Net periodic benefit cost 0.1 0.1 (0.1)
Non-U.S. [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 1.2 1.2 1.2
Interest cost 1.7 1.7 2.1
Expected return on plan assets (1.6) (1.9) (1.8)
Amortization of net actuarial gain (loss)   0.1  
Net periodic benefit cost $ 1.3 $ 1.1 $ 1.5