Accrued Product Warranty (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Mar. 28, 2014	Mar. 29, 2013
Warranty Liability [Line Items]
Accrued product warranty, at beginning of period	$ 53.2	$ 52.8
Charged to cost of revenues	25.8	25.8
Actual product warranty expenditures	(26.9)	(27.2)
Accrued product warranty, at end of period	$ 52.1	$ 51.4