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, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 21.5	$ 14.1	$ 50.9	$ 41.7
Interest Expense | Fair Value Hedging | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	0.2	0.4	0.7	1.3
Other Income | Fair Value Hedging | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency transaction gain (loss), realized	2.9	0.0	5.2	0.0
Other Income | Fair Value Hedging | Loans Payable
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency transaction gain (loss), realized	$ (3.1)	$ 0.0	$ (6.0)	$ 0.0