Employee Benefit and Retirement Plans - Components of Other Postretirement Benefit Expenses (Details) - Other Postretirement Benefit Plan - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2021	Aug. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.5	$ 0.5	$ 1.5	$ 1.4
Interest costs	0.4	0.5	1.2	1.5
Amortization of prior service costs	(0.1)	(1.2)	(0.3)	(3.5)
Defined Benefit Plan, Amortization of Gain (Loss)	0.0	0.0	0.0	0.1
Total other postretirement expense	$ 0.8	$ (0.2)	$ 2.4	$ (0.7)