Leases - Weighted Averages (Details)	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Finance lease, weighted average remaining lease term	19 years	19 years 1 month 6 days
Operating lease, weighted average remaining lease term	10 years 2 months 12 days	10 years 7 months 6 days
Finance lease, weighted average discount rate (in percent)	5.70%	8.00%
Operating lease, weighted average discount rate (in percent)	2.80%	2.90%