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Reclassifications Out of Accumulated Other Comprehensive Income/(Loss) - Summary of Reclassifications Out of Accumulated Other Comprehensive Loss (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Cost of goods sold $ (563.6) $ (540.0) $ (548.0)
Income tax expense (15.0) (26.4) (3.1)
Reclassification Out of Accumulated Other Comprehensive Income [Member]
      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Total reclassifications 3.7    
Reclassification Out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments [Member]
      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Cost of goods sold (0.1)    
Total before tax (0.1)    
Income tax expense 0    
Total reclassifications (0.1)    
Reclassification Out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Pension Plan Items [Member]
      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Amortization of prior service credit (1.3)    
Amortization of actuarial net losses 6.2    
Total before tax 4.9    
Income tax expense (1.1)    
Total reclassifications $ 3.8