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Leases - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Leases [Abstract]      
Operating lease, impairment loss $ 6.5 $ 1.0 $ 0.0
Operating Lease Income Comprehensive Income Extensible List Not Disclosed Flag operating lease revenue operating lease revenue operating lease revenue
Operating lease revenue $ 1.7 $ 1.8 $ 1.6
2024 2.4    
2025 1.6    
2026 1.5    
2027 1.4    
2028 1.3    
Thereafter $ 5.1