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Other Income (Expense) - Net - Computation of Other Income (Expense) - Net (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Other Income and Expenses [Abstract]    
Interest income $ 0.4 $ 0.1
Net foreign exchange loss (1.5) (2.1)
Net periodic pension and postretirement benefits – non-service 2.2 0.6
Settlement of treasury lock 0.0 13.3
Loss on early extinguishment of debt 0.0 (7.8)
Other 0.4 (1.3)
Total other income (expense) – net $ 1.5 $ 2.8