Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 192.4	$ 193.6	$ 567.0	$ 578.5
Americas [Member]
Disaggregation of Revenue [Line Items]
Net sales	121.8		330.2
Asia [Member]
Disaggregation of Revenue [Line Items]
Net sales	19.3		81.6
Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	51.3		155.2
Specialty Solutions [Member]
Disaggregation of Revenue [Line Items]
Net sales	137.7		392.7
Specialty Solutions [Member] | Americas [Member]
Disaggregation of Revenue [Line Items]
Net sales	88.7		219.8
Specialty Solutions [Member] | Asia [Member]
Disaggregation of Revenue [Line Items]
Net sales	8.4		39.2
Specialty Solutions [Member] | Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	40.6		133.7
Performance Materials [Member]
Disaggregation of Revenue [Line Items]
Net sales	54.7		174.3
Performance Materials [Member] | Americas [Member]
Disaggregation of Revenue [Line Items]
Net sales	33.1		110.4
Performance Materials [Member] | Asia [Member]
Disaggregation of Revenue [Line Items]
Net sales	10.9		42.4
Performance Materials [Member] | Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 10.7		$ 21.5