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Commitment and Contingencies - Additional Information (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Sep. 30, 2024
Commitments And Contingencies [Line Items]    
Reserve for unpaid and incurred but not reported claims, amount $ 175.1 $ 165.6
Reserve for unpaid and incurred but not reported claims, classified in current liabilities 52.3 52.8
Reserve for unpaid and incurred but not reported claims, classified in non-current liabilities 122.8 112.8
Claims recoverable from third party insurance carriers 24.2 13.4
Other Current Assets    
Commitments And Contingencies [Line Items]    
Claims recoverable from third party insurance carriers 7.0 4.0
Other Assets    
Commitments And Contingencies [Line Items]    
Claims recoverable from third party insurance carriers $ 17.2 $ 9.4