Deferred Costs - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Nov. 29, 2013	Feb. 28, 2013	Nov. 23, 2012
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Allowance for deferred costs related to supply agreements	$ 5.6	$ 7.9	$ 7.8