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Product Warranty Obligations (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Product Warranties Disclosures [Abstract]    
Product warranty period 12 months  
Changes in product warranty obligations    
Beginning balance $ 18.3 $ 16.5
Warranties recorded at time of sale 17.0 14.8
Adjustments to pre-existing warranties 9.8 2.9
Settlements of warranty claims (21.4) (15.9)
Ending balance $ 23.7 $ 18.3