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, 2013	Aug. 31, 2012	Aug. 31, 2013	Aug. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 14.0	$ 13.2	$ 41.4	$ 40.7
Interest Expense [Member] | Fair Value Hedging [Member] | Interest rate contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 1.2	$ 1.1	$ 3.7	$ 3.5