Income Taxes (Detail) - USD ($)	3 Months Ended			6 Months Ended		15 Months Ended
	May 31, 2019	Feb. 28, 2019	May 31, 2018	May 31, 2019	May 31, 2018	Feb. 28, 2019	Nov. 30, 2018
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 133,200,000			$ 133,200,000			$ 125,600,000
Unrecognized tax benefits that would impact effective tax rate in future	105,400,000			105,400,000			99,400,000
Accrued interest on unrecognized tax benefits	55,800,000			55,800,000			49,300,000
Accrued penalties on unrecognized tax benefits	0			0			$ 0
Increase of provisional tax charge related to the Tax Act during period		$ 200,000
Total tax charge related to Tax Act					$ 160,500,000	$ 165,300,000
Total tax charge related to write down of deferred tax asset as a result of the Tax Act						$ 112,700,000
Income tax expense	$ 45,319,000		$ 23,857,000	$ 61,539,000	$ 207,414,000
Effective income tax rate				28.30%	84.80%