Long-Term Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				1 Months Ended
	Aug. 26, 2012	Aug. 28, 2011	Nov. 28, 2010	Sep. 13, 2012	Sep. 13, 2012 Tranche One	Sep. 13, 2012 Tranche Two	Sep. 13, 2012 Tranche Three	Sep. 15, 2011 6.75% senior debt due September 2011	Aug. 26, 2012 6.75% senior debt due September 2011
Debt Instrument [Line Items]
Repayment of debt	$ 16.9	$ 2.5						$ 342.7
Coupon rate on senior unsecured notes	3.25%				1.35%	2.10%	3.25%		6.75%
Reduction of net interest expense due to impact of interest rate swap contracts	2.2	3.1
Proceeds from termination of interest rate swap contract			31.5
Senior unsecured notes				$ 750	$ 250	$ 250	$ 250
Senior unsecured notes, maturity period					3 years	5 years 6 months	10 years