Treasury Stock Purchases (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount		$ 20.0
Treasury Stock, Shares, Acquired		2.6	0.2
Treasury Stock, Value, Acquired, Cost Method		$ 18.6	$ 1.4
Treasury Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method	$ 0.0	$ 18.6	$ 1.4