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, 2020	May 31, 2019	May 31, 2020	May 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.4	$ 0.5	$ 0.9	$ 1.0
Interest costs	0.5	0.6	1.0	1.3
Amortization of prior service costs	(1.2)	(2.1)	(2.3)	(4.3)
Defined Benefit Plan, Amortization of Gain (Loss)	0.0	0.2	0.1	0.4
Total other postretirement expense	$ (0.3)	$ (1.2)	$ (0.5)	$ (2.4)