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Financial Instruments - Derivative Instruments Not Designated as Hedges Included in Condensed Consolidated Statements of Earnings (Detail) - Not Designated as Hedging Instrument [Member] - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Sep. 30, 2017
Oct. 01, 2016
Foreign Currency Forwards [Member] | Other Income (Expense) - Net [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income $ 1.6 $ (0.7) $ (2.3) $ (4.9)
Equity Forwards [Member] | Operating Expenses [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income $ (0.9) $ (0.7) $ (2.2) $ (1.4)