Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Contract with Customer, Liability, Current	$ 139,100	$ 207,500
Revenue from Contract with Customer, Excluding Assessed Tax	(28,406,365)	(31,900,453)
Contract with Customer, Liability, Revenue Recognized	$ 194,800	$ 170,700