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Details of Foreign Exchange Contracts Pre-Tax Amounts (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 29, 2019
Jun. 30, 2018
Jun. 29, 2019
Jun. 30, 2018
Dec. 29, 2018
Derivative Instruments and Hedging Activities Disclosure [Line Items]          
Proceeds from Hedge, Investing Activities     $ (22.3) $ 23.5  
Document Period End Date     Jun. 29, 2019    
Fair Value Hedging [Member]          
Derivative Instruments and Hedging Activities Disclosure [Line Items]          
Derivative, Loss on Derivative $ 0.7 $ 0.8 $ 6.1 1.6  
Net Investment Hedging | Foreign Exchange Contracts          
Derivative Instruments and Hedging Activities Disclosure [Line Items]          
Derivative, Notional Amount 326.1   326.1    
Proceeds from Hedge, Investing Activities     3.9 20.3  
Net Investment Hedging | Currency Swap [Member]          
Derivative Instruments and Hedging Activities Disclosure [Line Items]          
Derivative, Notional Amount 1,500.0   1,500.0   $ 250.0
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts | Other Income And Expense [Member]          
Derivative Instruments and Hedging Activities Disclosure [Line Items]          
Gain (Loss) on Derivative Instruments, Net, Pretax $ (3.6) $ (2.2) $ (1.3) $ 14.9