Leases - Schedule of Lease Terms and Discount Rates (Details)	Sep. 30, 2021	Sep. 30, 2020
Weighted-average remaining lease terms (years)
Operating leases	9 years 2 months 12 days	10 years 7 months 6 days
Finance leases	4 years 4 months 24 days	4 years 3 months 18 days
Weighted-average discount rate
Operating leases	7.50%	8.30%
Finance leases	5.40%	5.30%