Gains Losses Related to Foreign Currency Forward Exchange Contracts that are Not Designated as Hedging Instruments (Detail) (Selling, General and Administrative Expenses, USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2011	Oct. 01, 2010	Oct. 02, 2009
Selling, General and Administrative Expenses
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Net Earnings on Derivative not designated as hedging instrument	$ 5.0	$ 2.3	$ 10.1