Derivative Financial Instruments (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 31, 2016	Dec. 26, 2015	Oct. 01, 2016	Sep. 01, 2015
Derivative [Line Items]
Outstanding foreign currency forward contracts and swaps	$ 65.9		$ 65.9
Contract maturity date			Sep. 25, 2019
Foreign currency forward contracts entered	6.7		$ 6.7	$ 12.0
Foreign currency forward contracts settled	5.0	$ 5.2	10.2	$ 10.6
Derivative, Fixed Interest Rate					1.97%
Net amount of existing losses expected to be reclassified into earnings within the next 12 months	$ 4.8		$ 4.8
Interest Rate Swap
Derivative [Line Items]
Outstanding foreign currency forward contracts and swaps						$ 25.0