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Accrued Product Warranty (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 28, 2012	Sep. 30, 2011
Warranty Liability [Line Items]
Accrued product warranty, at beginning of period	$ 50.1	$ 53.2
Charged to cost of revenues	58.1	45.1
Actual product warranty expenditures	(55.4)	(48.2)
Accrued product warranty, at end of period	$ 52.8	$ 50.1

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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