Restructuring and Severance (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018	Nov. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2.8	$ 0.2	$ 3.9	$ 1.5
Payments for Restructuring			2.3
Proceeds from Sale of Property, Plant, and Equipment			5.5	0.0
Gain (Loss) on Disposition of Property Plant Equipment	4.2	0.0	4.1	0.0
Restructuring Reserve	2.7		2.7		$ 1.1
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.4	0.2	2.1	1.5
Specialty Solutions [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.0	0.0	0.0	0.7
Performance Materials [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.2	0.1	1.9	0.1
Performance Materials [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.4	0.0	1.8	0.0
Corporate, Non-Segment [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.2	$ 0.1	0.2	$ 0.7
2018 restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			3.7
Proceeds from Sale of Property, Plant, and Equipment	4.9
Gain (Loss) on Disposition of Property Plant Equipment	$ 4.4
2017 restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			0.2
Project Life to Date [Member] | 2018 restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			5.5
Payments for Restructuring			2.8
Project Life to Date [Member] | 2017 restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 5.4