Accrued Product Warranty (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jun. 27, 2014	Jun. 28, 2013
Warranty Liability [Line Items]
Accrued product warranty, at beginning of period	$ 53.2	$ 52.8
Charged to cost of revenues	38.8	38.9
Actual product warranty expenditures	(41.5)	(41.0)
Accrued product warranty, at end of period	$ 50.5	$ 50.7