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Debt - Effective Interest Rate (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Sep. 30, 2021
Debt      
Effective interest rate including effects of interest rate swap agreements 5.1% 3.4%  
Amortization of deferred debt issuance costs $ 1.2   $ 1.2