Inventories - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Nov. 30, 2016	Aug. 31, 2016	May 31, 2016	Feb. 29, 2016	Nov. 30, 2015	Aug. 31, 2015	May 31, 2015	Feb. 28, 2015	Nov. 30, 2016	Nov. 30, 2015
Inventory Disclosure [Abstract]
LIFO Inventory Related Text									46.39	50.4
Percentage of LIFO Inventory	47.90%				48.40%				47.90%	48.40%
Inventory, LIFO Reserve, Period Charge	$ (1.4)	$ (0.6)	$ (0.3)	$ (0.5)	$ (3.7)	$ (2.1)	$ (1.5)	$ (2.2)	$ 1.8	$ 9.5
Effect of LIFO Inventory Liquidation on Income									$ 1.6