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Pensions - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
U.S. Benefit Plans
   
Defined Benefit Plan Disclosure [Line Items]    
Contribution to defined benefit plan $ 3.5 $ 2.8
Expected contribution to defined benefit plan 9.2  
Non-U.S. Benefit Plan
   
Defined Benefit Plan Disclosure [Line Items]    
Contribution to defined benefit plan 0.7 0.8
Expected contribution to defined benefit plan $ 1.3