Employee Benefit and Retirement Plans - Components of Other Postretirement Benefit Expenses (Details) - Other postretirement benefits - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.5	$ 0.5	$ 0.9	$ 1.0
Interest costs	0.4	0.4	0.8	0.8
Expected return on plan assets	0.0	0.0	0.0	0.0
Amortization of prior service costs	(0.1)	(0.1)	(0.2)	(0.2)
Amortization of net actuarial losses	(0.1)	0.0	(0.1)	0.0
Total other postretirement expense	$ 0.7	$ 0.8	$ 1.4	$ 1.6