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, 2018	May 31, 2017	May 31, 2018	May 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.6	$ 0.7	$ 1.2	$ 1.4
Interest costs	0.6	0.9	1.2	1.8
Amortization of prior service costs	(2.1)	0.0	(4.3)
Defined Benefit Plan, Amortization of Gain (Loss)	0.0	0.1	0.0	0.1
Total other postretirement expense	$ (0.9)	$ 1.5	$ (1.9)	$ 3.1