Leases (Additional Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2017	Feb. 29, 2020	Sep. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset				$ 373,413
Operating lease liability				$ 411,912
Total operating lease expense	$ 125,400	$ 130,200	$ 117,200
ASU 2016-02
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset					$ 414,600
Operating lease liability					$ 437,500
Buildings and Real Estate | Minimum
Lessee, Lease, Description [Line Items]
Term of contract				1 year
Buildings and Real Estate | Maximum
Lessee, Lease, Description [Line Items]
Term of contract				36 years