Employee Benefit and Retirement Plans - Components of Other Postretirement Benefit Expenses (Details) - Other Postretirement Benefit Plan - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2021	May 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.5	$ 0.4	$ 1.0	$ 0.9
Interest costs	0.4	0.5	0.8	1.0
Amortization of prior service costs	(0.1)	(1.2)	(0.2)	(2.3)
Defined Benefit Plan, Amortization of Gain (Loss)	0.0	0.0	0.0	0.1
Total other postretirement expense	$ 0.8	$ (0.3)	$ 1.6	$ (0.5)