Gains 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	3 Months Ended
	Dec. 27, 2013	Dec. 28, 2012
Selling, general and administrative expenses
Derivative [Line Items]
Amount of Gain Recognized in Net Earnings on Derivative not designated as hedging instrument	$ 4.7	$ 2.5