Restructuring and Other Costs - Schedule of Restructuring and Other Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Restructuring and Related Activities [Abstract]
Restructuring	$ 62.7	$ 15.4
Other	2.8	16.7
Restructuring and other costs, net	$ 65.5	$ 32.1