Inventories (Detail) - USD ($) $ in Millions	3 Months Ended
	Jun. 28, 2015	Sep. 27, 2015	Sep. 28, 2014
Inventory Disclosure [Abstract]
Inventory Write-down	$ 7.9
Raw materials		$ 56.5	$ 55.3
Work in progress		111.7	94.0
Finished goods		59.0	55.7
Total		$ 227.2	$ 205.0