Segment and Geographical Information - Schedule of reconciliation of segment (Details 2) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Segment and Geographical Information
Income from discontinued operations (net of income tax expense)	$ 21.0	$ 27.9
Interest income	(1.8)	(0.9)
Interest expense	23.3	17.9
Income tax expense	2.3	13.3
Depreciation and amortization	31.0	25.6
Business acquisition, development, and integration costs	10.7	7.6
Inventory step up charges	8.0	0.0
Inventory step-up	1.0	0.7
Net loss on divestiture	0.0	3.1
Income from continuing operations	47.8	50.1
Corporate
Segment and Geographical Information
Adjusted EBITDA (1)	(13.1)	(16.9)
Advanced Process Solutions | Operating segments
Segment and Geographical Information
Adjusted EBITDA (1)	71.3	54.6
Molding Technology Solutions | Operating segments
Segment and Geographical Information
Adjusted EBITDA (1)	$ 43.1	$ 51.8