Leases (Lease Term and Discount Rate) (Details)	Aug. 31, 2021	Aug. 31, 2020
Weighted-average remaining lease term
Operating leases	5 years 7 months 6 days	5 years 4 months 24 days
Finance leases	3 years 4 months 24 days	5 years 8 months 12 days
Weighted-average discount rate
Operating leases	3.09%	3.18%
Finance leases	2.51%	4.28%