Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018	Nov. 30, 2018	Nov. 30, 2017
Income Tax Examination [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%		21.00%	35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		$ 376.5
U.S. Tax Act, Incomplete Accounting, Transition Tax		78.6
U.S. Tax Act, Non-cash Income Tax Expense (Benefit)			$ 0.0	$ 297.9	$ 301.5
U.S. Tax Act, Incomplete Accounting, Withholding Tax on Repatriation Earnings		6.3
Effective income tax rate reconciliation, tax credit, amount	$ 11.3	2.4	28.9	305.4
Unrecognized tax benefits, reduction resulting from lapse of applicable statute of limitations		1.3		3.5
Domestic Tax Authority
Income Tax Examination [Line Items]
Shares issued, tax benefit		$ 1.1	12.9	4.5
Foreign Tax Authority
Income Tax Examination [Line Items]
Effective income tax rate reconciliation, change in deferred tax assets valuation allowance, amount				$ 0.5
Accounting Standards Update 2016-16 [Member]
Income Tax Examination [Line Items]
Effective income tax rate reconciliation, tax credit, amount			$ (16.2)