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Derivative Financial Instruments - Additional Information (Detail)
€ in Millions, $ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2015
EUR (€)
Jun. 29, 2018
USD ($)
Jun. 30, 2017
USD ($)
Jun. 29, 2018
USD ($)
Jun. 30, 2017
USD ($)
Sep. 29, 2017
USD ($)
Derivative [Line Items]            
Gains (Losses) on foreign currency forward exchange contracts not designated as an accounting hedge   $ (4.0) $ 5.3 $ (5.4) $ 4.7  
Net Gain (Loss) expected to be reclassified into earnings over next 12 months   $ (4.4)   $ (4.4)    
Maturities of forecasted transactions using forward exchange contracts       24 months    
3.625% Senior Notes, Due April 2023            
Derivative [Line Items]            
Debt instrument, interest rate 3.625% 3.625%   3.625%   3.625%
Debt instruments maturity date Apr. 30, 2023          
Net Investment Hedges | 3.625% Senior Notes, Due April 2023            
Derivative [Line Items]            
Derivative notional amount | € € 330.0          
Foreign Exchange Forward            
Derivative [Line Items]            
Derivative notional amount   $ 465.9   $ 465.9   $ 406.9
Foreign Exchange Forward Contracts Related to Net Monetary Assets | Cash Flow Hedging            
Derivative [Line Items]            
Derivative notional amount   $ 93.0   $ 93.0