Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
Income Tax Examination [Line Items]
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	$ 0.9	$ 0.7
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	2.4	3.8
Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	0.1
Change in enacted tax rate		0.7
Domestic Tax Authority [Member]
Income Tax Examination [Line Items]
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 1.6
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount		$ 2.4