Financial Instruments- Impact of Fair Value Hedges on Other Comprehensive Income, Accumulated Other Comprehensive Income and Income Statement (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 12.4	$ 14.0	$ 37.3	$ 41.4
Interest Expense [Member] | Fair Value Hedging [Member] | Interest rate contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 1.3	$ 1.2	$ 3.8	$ 3.7