Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	May 31, 2018	May 31, 2017	May 31, 2018	May 31, 2017	Nov. 30, 2017
Income Tax Examination [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%		35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability			$ 376.5
U.S. Tax Act, Incomplete Accounting, Repatriation and Withholding Tax Impact			78.6
U.S. Tax Act, Non-cash Income Tax Expense (Benefit)			297.9
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount			72.3
U.S. Tax Act, Incomplete Accounting, Withholding Tax on Repatriation Earnings			6.3
Effective income tax rate reconciliation, tax credit, amount	$ 2.4	$ 8.3	305.4	$ 10.7
Unrecognized tax benefits, reduction resulting from lapse of applicable statute of limitations	1.3		3.5	2.2
Effective income tax rate reconciliation, change in deferred tax assets valuation allowance, amount			0.5
Domestic Tax Authority
Income Tax Examination [Line Items]
Shares issued, tax benefit	$ 1.1	7.0	$ 4.5	8.6
Foreign Tax Authority
Income Tax Examination [Line Items]
Unrecognized tax benefits, reduction resulting from lapse of applicable statute of limitations		$ 1.3
Effective income tax rate reconciliation, change in deferred tax assets valuation allowance, amount				$ 0.1