Business Segment Information (Details) $ in Millions	3 Months Ended
	Feb. 28, 2019 segment	Feb. 28, 2019	Feb. 28, 2019 USD ($)	Feb. 28, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments	2	2
Restructuring and severance			$ 1.1	$ 1.3
Business Combination, Integration Related Costs			0.3	0.6
Net sales			168.9	178.7
Interest expense			(5.0)	(5.1)
Income (loss) before income taxes			(5.4)	2.2
Performance Materials [Member]
Segment Reporting Information [Line Items]
Net sales			56.2
Specialty Solutions [Member]
Segment Reporting Information [Line Items]
Business Combination, Integration Related Costs				0.4
Net sales			112.7
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)			6.5	15.7
Operating Segments [Member] | Performance Materials [Member]
Segment Reporting Information [Line Items]
Net sales			56.2	69.5
Operating Income (Loss)			(2.8)	2.1
Operating Segments [Member] | Specialty Solutions [Member]
Segment Reporting Information [Line Items]
Net sales			112.7	109.2
Operating Income (Loss)			9.3	13.6
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Interest expense			(5.0)	(5.1)
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Corporate expenses			(6.9)	(8.4)
Employee Severance [Member]
Segment Reporting Information [Line Items]
Restructuring and severance			0.7	1.3
Employee Severance [Member] | Performance Materials [Member]
Segment Reporting Information [Line Items]
Restructuring and severance			0.7	0.0
Restructuring and Related Cost, Accelerated Depreciation			0.6
Employee Severance [Member] | Specialty Solutions [Member]
Segment Reporting Information [Line Items]
Restructuring and severance			0.0	0.7
Facility Closing [Member] | Performance Materials [Member]
Segment Reporting Information [Line Items]
Restructuring and severance			$ 0.4	$ 0.0