Employee Benefit and Retirement Plans-Components of Other Postretirement Benefit Expenses (Details) (Other postretirement benefits [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2014	May 31, 2013
Other postretirement benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.9	$ 1.2	$ 1.8	$ 2.5
Interest costs	1.0	1.0	2.1	2.0
Amortization of prior service costs	0	(0.3)	0	(0.6)
Amortization of losses	0	0.3	0	0.7
Total other postretirement expense	$ 1.9	$ 2.2	$ 3.9	$ 4.6