Quarterly Financial Data Quarterly Data (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	Nov. 30, 2014
Depreciation expense									$ 26.8	$ 30.3	$ 29.5
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
Income tax (Expense) Benefit									$ 10.3	$ (2.4)	$ (0.4)
Effective Income Tax Rate									(104.00%)	11.40%	(3.40%)
Taxes, Other									$ 2.2
Other Tax Expense (Benefit)									$ 1.6
Valuation Allowance, Deferred Tax Asset, Explanation of Change									1.9
Manufacturing Facilities and Equipment [Member]
Depreciation expense	$ 5.0	$ 4.7	$ 4.9	$ 7.7	$ 8.2	$ 7.8	$ 5.0	$ 5.0	$ 22.3	$ 26.0	$ 23.4
Senior Notes [Member]
Premium paid for debt redemption										$ 1.0