Financial Instruments - Impact of Fair Value Hedges on Other Comprehensive Income, Accumulated Other Comprehensive Income and Income Statement (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2015	Aug. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 13.6	$ 12.4	$ 39.5	$ 37.3
Interest Expense [Member] | Fair Value Hedging [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 1.2	$ 1.3	$ 3.7	$ 3.8