Restructuring and Severance - Rollforward Schedule (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Nov. 30, 2018	Aug. 31, 2018	May 31, 2018	Feb. 28, 2018	Nov. 30, 2017	Aug. 31, 2017	May 31, 2017	Feb. 28, 2017	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2016
Restructuring Reserve [Roll Forward]
Beginning Balance				$ 2.2				$ 4.2	$ 2.2	$ 4.2	$ 2.3
Restructuring charges	$ 1.7	$ 0.3	$ 0.2	$ 1.3	$ 0.6	$ 0.4	$ 3.6	$ 1.0	3.5	5.7	11.1
Payments for Restructuring									4.6	7.7	9.2
Ending Balance	$ 1.1				$ 2.2				$ 1.1	$ 2.2	$ 4.2