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Summary of Changes in Projected Benefit Obligation (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
U.S. Benefit Plans
    
Defined Benefit Plan Disclosure [Line Items]    
Benefit obligation, beginning of year $ 156.6 $ 138.4
Interest cost 7.7 7.8
Actuarial loss 22.4 17.4
Benefits paid (7.0) (7.0)
Benefit obligation, end of year 179.7 156.6
Accumulated benefit obligation, end of year 177.2 154.5
Non-U.S. Benefit Plan
    
Defined Benefit Plan Disclosure [Line Items]    
Benefit obligation, beginning of year 57.1 52.6
Service cost 0.2 0.1
Interest cost 2.6 2.9
Actuarial loss 5.9 4.9
Benefits paid (2.9) (2.5)
Translation and other 2.7 (0.9)
Benefit obligation, end of year 65.6 57.1
Accumulated benefit obligation, end of year $ 65.6 $ 57.1