Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
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			0.6
Change related to prior year adjustments				2.2
Change in enacted tax rate	5.0		$ 1.8	$ 3.7
Domestic Tax Authority [Member]
Income Tax Examination [Line Items]
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	$ 13.4	$ 0.0	17.2
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount			$ 3.8