Segment and Geographical Information - Schedule of reconciliation of segment (Details 2) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Segment and Geographical Information
Interest income	$ (0.9)	$ (0.6)
Interest expense	17.9	21.2
Income tax expense	23.3	31.3
Depreciation and amortization	27.9	29.3
Business acquisition, development, and integration costs	7.6	9.1
Inventory step-up	0.7	1.5
Net loss on divestiture	3.1	(31.6)
Other	0.0	0.1
Consolidated net income	50.1	77.7
Corporate
Segment and Geographical Information
Adjusted EBITDA (1)	(17.2)	(11.2)
Advanced Process Solutions | Operating segments
Segment and Geographical Information
Adjusted EBITDA (1)	54.6	48.5
Molding Technology Solutions | Operating segments
Segment and Geographical Information
Adjusted EBITDA (1)	51.8	48.4
Batesville | Operating segments
Segment and Geographical Information
Adjusted EBITDA (1)	$ 40.5	$ 52.3