Income Taxes (Income Tax Benefit (Provision) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018
Income Tax Disclosure [Abstract]
Benefit (provision) for income taxes	[1]	$ 140,530	$ 75,961	$ 220,230	$ 208,572
Effective tax rate		25.00%	19.70%	25.00%	31.80%
Write down of deferred tax asset resulting from Tax Cuts and Jobs Act					$ 68,600
Excluding impact of write down of deferred tax assets, percent			21.40%

[1] Provision for income taxes for the six months ended May 31, 2018 includes a non-cash one-time write down of deferred tax assets of $68.6 million resulting from the Tax Cuts and Jobs Act enacted in December 2017.