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Other Income (Expense) - Net - Computation of Other Income (Expense) - Net (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jul. 02, 2016
Jul. 04, 2015
Jul. 02, 2016
Jul. 04, 2015
Other Income and Expenses [Abstract]        
Interest income $ 0.2 $ 0.1 $ 0.3 $ 0.2
Net foreign exchange gain (loss) 1.0 (0.7) 0.1 (1.5)
Other   (0.1) 0.1 (0.1)
Total other income (expense) - net $ 1.2 $ (0.7) $ 0.5 $ (1.4)