Contingencies and Litigation - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2018	Nov. 30, 2019	Aug. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Outstanding letters of credit		$ 17.4	$ 18.2
Discounted present value of future minimum lease payments		$ 8.5
Weighted Average Discount Rate on Future Minimum Lease Payments		2.13%
Sales to Iranian Distributors	$ 0.5