Accumulated Other Comprehensive Loss - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	May 25, 2012	Aug. 25, 2012 DerivativeInstrument	Aug. 27, 2011 FSS
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Number of treasury rate locks		4
Net loss on derivatives	$ 2.8		$ 5.4
Liability balance of treasury rate locks outstanding		4.9
Net derivative losses amortized into interest expense		1.9
Number of forward starting swaps			3
Derivatives being amortized into interest expense		$ 1.9	$ 1.4