Leases (Additional Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018	Sep. 01, 2019
Lessee, Lease, Description [Line Items]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Operating lease right-of-use asset	$ 362,847
Operating lease liability	$ 412,758
Total operating lease expense		$ 125,400	$ 130,200
ASU 2016-02
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset				$ 414,600
Operating lease liability				$ 437,500