Long-Term Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended		3 Months Ended			1 Months Ended
	Nov. 25, 2012	Nov. 27, 2011	Nov. 28, 2010	Nov. 25, 2012	Nov. 27, 2011	Nov. 25, 2012 Tranche One [Member]	Nov. 25, 2012 Tranche Two [Member]	Nov. 25, 2012 Tranche Three [Member]	Sep. 15, 2011 6.75% Senior Debt Due September 2011 [Member]	Nov. 25, 2012 6.75% Senior Debt Due September 2011 [Member]
Debt Instrument [Line Items]
Senior unsecured notes	$ 750.0			$ 750.0		$ 250.0	$ 250.0	$ 250.0
Coupon rate on senior unsecured notes	3.25%			3.25%		1.35%	2.10%	3.25%		6.75%
Senior unsecured notes, maturity period						3 years	5 years 6 months	10 years
Repayment of debt				34.2	348.1				342.7
Reduction of net interest expense due to impact of interest rate swap contracts	2.3	2.4		4.5	5.5
Proceeds from termination of interest rate swap contract			$ 31.5