Restructuring (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Total restructuring related expense	$ 10.6	$ 6.3
2019 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Total restructuring related expense	6.6	6.3
2019 Restructuring Program | Costs of products sold
Restructuring Cost and Reserve [Line Items]
Severance and related benefit costs	0.1	0.9
Accelerated depreciation & asset write-offs	1.4	3.4
Other exit costs	5.1	2.0
2020 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Total restructuring related expense	4.0	0.0
2020 Restructuring Program | Costs of products sold
Restructuring Cost and Reserve [Line Items]
Other restructuring related costs	0.8	0.0
2020 Restructuring Program | Selling, general and administrate expense
Restructuring Cost and Reserve [Line Items]
Severance and related benefit costs	0.3	0.0
Other restructuring related costs	$ 2.9	$ 0.0