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Schedule of Pension Plans with Accumulated Benefit Obligation and Projected Benefit Obligation in Excess of Plan Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
United States Pension Plans, Defined Benefit    
Defined Benefit Plan Disclosure    
Projected benefit obligation $ 53.3 $ 54.6
Accumulated benefit obligation 47.3 48.5
Foreign Pension Plans, Defined Benefit    
Defined Benefit Plan Disclosure    
Projected benefit obligation 35.2 39.5
Accumulated benefit obligation 29.5 32.7
Fair value of plan assets $ 1.0 $ 1.0