Other Income (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Other Income and Expenses [Abstract]
Interest income	$ 1.3	$ 0.5
Royalty income	2.5	2.7
Legacy product liability and environmental charges	(2.8)	(3.2)
Non-operating pension and postretirement benefit credit	12.4	4.4
Other	3.9	(1.5)
Other income	$ 17.3	$ 2.9