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, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.8	$ 0.9	$ 1.6	$ 1.8
Interest costs	0.9	1.0	1.8	2.1
Total other postretirement expense	$ 1.7	$ 1.9	$ 3.4	$ 3.9