Employee Benefit and Retirement Plans - Components of Other Postretirement Benefit Expenses (Details) - Other postretirement benefits - USD ($) $ in Millions	3 Months Ended
	Feb. 28, 2022	Feb. 28, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.4	$ 0.5
Interest costs	0.4	0.4
Expected return on plan assets	0.0	0.0
Amortization of prior service costs	(0.1)	(0.1)
Amortization of net actuarial losses	0.0	0.0
Total other postretirement expense	$ 0.7	$ 0.8