Employee Benefit and Retirement Plans-Components of Other Postretirement Benefit Expenses (Details) - Other postretirement benefits [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.7	$ 0.6	$ 1.4	$ 1.4
Interest costs	0.9	1.0	1.8	1.9
Defined Benefit Plan, Amortization of Gains (Losses)	0.1	(0.1)	0.1	0.0
Total other postretirement expense	$ 1.5	$ 1.7	$ 3.1	$ 3.3