Description of Business and Significant Accounting Policies Description of Business and Significant Accounting Policies - Property, Plant and Equipment Useful Lives (Details) $ in Millions	3 Months Ended								12 Months Ended
	Nov. 30, 2016 USD ($)	Aug. 31, 2016 USD ($)	May 31, 2016 USD ($)	Feb. 29, 2016 USD ($)	Nov. 30, 2015 USD ($)	Aug. 31, 2015 USD ($)	May 31, 2015 USD ($)	Feb. 28, 2015 USD ($)	Nov. 30, 2016 USD ($) segment	Nov. 30, 2015 USD ($) segment	Nov. 30, 2014 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of Reportable Segments | segment									2	2
Property, Plant and Equipment [Line Items]
Inventory Valuation Reserves | $	$ 7.1				$ 7.3				$ 7.1	$ 7.3
Asset impairment | $	$ 5.4	$ 0.0	$ 0.0	$ 0.3	$ 18.3	$ 0.5	$ 0.6	$ 0.0	$ 5.7	$ 19.4	$ 0.0
Engineered Surfaces [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of Reportable Segments | segment									2	2
Number of product lines									2
Property, Plant and Equipment [Line Items]
Asset impairment | $				$ 0.3					$ 5.4	$ 0.5
Performance Chemicals [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of Reportable Segments | segment									2	2
Number of product lines | segment									2
Property, Plant and Equipment [Line Items]
Asset impairment | $										$ 18.3