Income Taxes (Details) - USD ($)	3 Months Ended			9 Months Ended
	Aug. 31, 2019	Feb. 28, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018	Nov. 30, 2018
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 126,200,000			$ 126,200,000		$ 125,600,000
Unrecognized tax benefits that would impact effective tax rate in future	99,800,000			99,800,000		99,400,000
Accrued interest on unrecognized tax benefits	53,900,000			53,900,000		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		165,300,000			$ 160,200,000
Total tax charge related to write down of deferred tax asset as a result of the Tax Act		$ 112,700,000
Income tax expense	$ 18,250,000		$ 26,923,000	$ 79,789,000	$ 234,337,000
Effective income tax rate				26.50%	70.60%