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Postretirement Benefits (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
U.S. Benefit Plans
      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost $ 7.7 $ 7.8  
Amortization of actuarial loss (22.4) (17.4)  
U.S. Benefit Plans | Pension Plans, Defined Benefit
      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost 7.4 7.4 7.4
Expected return on plan assets (8.1) (7.2) (8.2)
Amortization of actuarial loss 5.5 4.5 3.5
Gross periodic pension expense 4.8 4.7 2.7
Multi-employer plans 0.3 0.3 0.2
Net periodic pension expense 5.1 5.0 2.9
Non-U.S. Benefit Plan
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.2 0.1  
Interest cost 2.6 2.9  
Amortization of actuarial loss (5.9) (4.9)  
Non-U.S. Benefit Plan | Pension Plans, Defined Benefit
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.2 0.1 0.2
Interest cost 2.6 2.9 2.7
Expected return on plan assets (2.6) (3.3) (3.1)
Amortization of actuarial loss 0.8 0.9 0.8
Gross periodic pension expense 1.0 0.6 0.6
Net periodic pension expense $ 1.0 $ 0.6 $ 0.6