Income Taxes (Income (Loss) From Continuing Operations Before Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
Income Tax Disclosure [Abstract]
Domestic	$ (452,233)	$ (415,707)	$ (426,897)
Foreign	712,971	866,411	800,298
Income before income tax	$ 260,738	$ 450,704	$ 373,401