Deferred Costs - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Aug. 30, 2013	Feb. 28, 2013	Aug. 24, 2012
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Allowance for deferred costs related to supply agreements	$ 6.5	$ 7.9	$ 8.4