Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2015	Aug. 31, 2014
Income Tax Examination [Line Items]
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations		$ 0.8		$ 0.8
Effective Income Tax Rate Reconciliation, Tax Credit, Amount			$ 17.2
Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Decrease resulting from prior period tax positions				5.8
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	$ 8.6
Change related to prior year adjustments	0.4	1.4		2.2
Change in enacted tax rate	0.7	3.7	6.8
Domestic Tax Authority [Member]
Income Tax Examination [Line Items]
Change related to prior year adjustments				1.4
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	$ 1.1	$ 6.2	$ 18.3	$ 5.5