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Commitments and Contingencies - Narrative (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]    
Estimated cost for proposed settlement $ 0.9  
Estimated costs associated with environmental remediation activities 11.6 $ 12.2
Product liability accruals 5.1 5.9
Product warranty accruals $ 10.9 $ 7.2