Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2020	Aug. 31, 2019
Income Tax Examination [Line Items]
Effective income tax rate reconciliation, tax credit, amount	$ 13.2	$ 15.5	$ 40.1	$ 44.4
Effective income tax rate reconciliation, change in deferred tax assets valuation allowance, amount			9.3
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	2.1	2.4	5.5	2.6
Effective Income Tax Rate Reconciliation, Disposition of Asset, Amount			9.9	16.2
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount		2.5	1.1	2.1
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	2.0	2.3	2.0	2.3
Tax Cuts and Jobs Act, Income Tax Expense (Benefit)		1.5		1.5
Domestic Tax Authority
Income Tax Examination [Line Items]
Shares issued, tax benefit	$ 7.3	$ 8.3	$ 13.0	$ 21.2