Segment and Geographical Information - Schedule of reconciliation of segment (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Segment and Geographical Information
Interest income	$ (0.6)	$ (0.2)	$ (1.9)	$ (0.4)
Interest expense	20.9	5.4	35.6	10.9
Income tax expense (benefit)	1.8	13.8	(10.6)	28.3
Depreciation and amortization	38.6	15.1	64.5	29.2
Goodwill and Intangible Asset Impairment	82.5	0.0	82.5	0.0
Business acquisition, development, and integration costs	8.0	0.5	61.8	1.1
Inventory step-up	0.7	0.7	3.1	1.2
Net loss on divestiture	3.0	0.0	3.0	0.0
Other	0.4	0.0	0.4	0.0
Business Combination, Inventory Step Up Costs	27.5	0.1	37.1	0.2
Consolidated net (loss) income	(72.2)	39.5	(73.0)	68.5
Corporate
Segment and Geographical Information
Adjusted EBITDA (1)	(10.8)	(12.2)	(19.7)	(21.0)
Process Equipment Group | Operating segments
Segment and Geographical Information
Adjusted EBITDA (1)	57.5	55.5	109.0	101.7
Milacron
Segment and Geographical Information
Goodwill and Intangible Asset Impairment			9.5
Milacron | Operating segments
Segment and Geographical Information
Adjusted EBITDA (1)	31.9	0.0	58.2	0.0
Batesville | Operating segments
Segment and Geographical Information
Adjusted EBITDA (1)	$ 32.0	$ 31.6	$ 55.0	$ 58.3