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Defined Benefit Plans - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Mar. 31, 2014
Sep. 30, 2015
Sep. 30, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Recognition of actuarial (losses) gains $ (2.8)   $ (8.9) $ (1.7)
Defined Benefit Plan Adjustments [Member] | Waterloo [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Recognition of actuarial (losses) gains 6.1      
Postretirement Benefits [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Recognition of actuarial (losses) gains $ 0.1 $ (0.6) $ 0.1 $ (0.6)
Reduction in accrued retiree benefit plans   (15.3)    
Defined benefit plans, curtailment charges   $ (3.5)