Stock Repurchase Programs - Additional Information (Detail) (USD $) Share data in Millions, unless otherwise specified	1 Months Ended	9 Months Ended
	Mar. 29, 2012	Aug. 31, 2012	Aug. 31, 2011
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	$ 300,000,000
Shares repurchased		7.6
Payments classification for shares repurchased		220,265,000	145,216,000
Stock purchase program recorded in retained earnings		85,700,000
Terminated December 2010 Plan
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	300,000,000
Remaining authorized amount available for repurchases	$ 38,400,000