Restructuring and Severance (Details) - USD ($) $ in Millions	3 Months Ended								9 Months Ended	12 Months Ended
	Nov. 30, 2019	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018	May 31, 2018	Feb. 28, 2018	Aug. 31, 2019	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Restructuring and severance	$ 0.6	$ 0.8	$ 2.8	$ 1.1	$ 1.7	$ 0.3	$ 0.2	$ 1.3		$ 5.3	$ 3.5	$ 5.7
Payments for Restructuring										6.4	4.6	$ 7.7
2018 restructuring plan [Member]
Restructuring and severance											$ 4.3
2017 restructuring plan [Member]
Restructuring and severance									$ 1.0
Project Life to Date [Member] | 2018 restructuring plan [Member]
Restructuring and severance									6.1
Project Life to Date [Member] | 2017 restructuring plan [Member]
Restructuring and severance									$ 6.2
Project Life to Date [Member] | 2016 restructuring plan [Member]
Restructuring and severance										$ 7.6