Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Feb. 29, 2020	Feb. 28, 2019
Income Tax Examination [Line Items]
Effective income tax rate reconciliation, tax credit, amount	$ 10.4	$ 17.6
Effective income tax rate reconciliation, change in deferred tax assets valuation allowance, amount	1.4
Domestic Tax Authority
Income Tax Examination [Line Items]
Shares issued, tax benefit	1.8	1.6
Accounting Standards Update 2016-16 [Member]
Income Tax Examination [Line Items]
Effective income tax rate reconciliation, tax credit, amount	$ 9.9	$ 16.2