Restructuring (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Restructuring Cost and Reserve [Line Items]
Total restructuring and related costs	$ 23.4	$ 7.5	$ 45.8	$ 14.1
Selling, general and administrate expense | IT enablement
Restructuring Cost and Reserve [Line Items]
Total restructuring and related costs	3.3	0.0	7.2	0.0
Project Momentum Restructuring
Restructuring Cost and Reserve [Line Items]
Total restructuring and related costs	20.1	7.5	38.6	14.1
Project Momentum Restructuring | Costs of products sold
Restructuring Cost and Reserve [Line Items]
Severance and related benefit costs	0.4	4.9	0.9	4.9
Accelerated depreciation & asset write-offs	3.4	0.9	4.7	0.9
Other restructuring related costs	11.7	(0.1)	22.7	0.2
Project Momentum Restructuring | Selling, general and administrate expense
Restructuring Cost and Reserve [Line Items]
Severance and related benefit costs	1.0	0.0	2.8	0.6
Accelerated depreciation & asset write-offs	0.5	0.0	1.0	0.0
Other restructuring related costs	$ 3.1	$ 1.8	$ 6.5	$ 7.5