Leases - Average Lease Terms And Discounts (Details)	Nov. 30, 2020	Aug. 31, 2020
Weighted average remaining lease term in years:
Operating leases	10 years 7 months 6 days	10 years 8 months 12 days
Finance leases	20 years 7 months 6 days	20 years 8 months 12 days
Weighted average discount rate
Operating leases	4.95%	4.95%
Finance leases	5.39%	5.39%