Employee Benefit and Retirement Plans - Components of Other Postretirement Benefit Expenses (Details) - Other Postretirement Benefit Plan - USD ($) $ in Millions	3 Months Ended
	Feb. 28, 2019	Feb. 28, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.5	$ 0.6
Interest costs	0.7	0.6
Amortization of prior service costs	(2.2)	(2.2)
Defined Benefit Plan, Amortization of Gain (Loss)	0.2	0.0
Total other postretirement expense	$ (1.2)	$ (1.0)