Employee Benefit and Retirement Plans-Components of Other Postretirement Benefit Expenses (Details) - Other postretirement benefits [Member] - USD ($) $ in Millions	3 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.7	$ 0.8
Interest costs	0.9	0.9
Defined Benefit Plan, Amortization of Gains (Losses)	0.0	0.1
Total other postretirement expense	$ 1.6	$ 1.6