Repurchase of Common Stock - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Nov. 30, 2013	Oct. 01, 2013	May 31, 2014 Prior Periods	May 31, 2014 Share Repurchase Plan Common Stock	May 31, 2014 Share Repurchase Plan Additional Paid-in Capital	May 31, 2014 Share Repurchase Plan Retained Earnings	Jun. 23, 2014 Maximum
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount		$ 25					$ 50
Stock Repurchased and Retired During Period, Shares	369,900		89,569
Stock Repurchased and Retired During Period, Value	13.3		1.3
Common stock share purchase, reduction				$ 0.1	$ 2.2	$ 12.3