Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Income Tax Examination [Line Items]
Decrease resulting from prior period tax positions			$ 6.6
Deposits Assets	18.8		18.8
Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	0.8
Decrease resulting from prior period tax positions			5.8
Change related to prior year adjustments	2.2
Change in enacted tax rate	3.7
Domestic Tax Authority [Member]
Income Tax Examination [Line Items]
Decrease resulting from prior period tax positions	1.4		1.4
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	$ 6.2	$ 3.3	$ 5.5	$ 4.5