Intangible Assets and Goodwill - Schedule of Impairment Charges (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment				$ 72.3
Intangible asset impairment				10.2
Total	$ 0.0		$ 0.0	82.5	$ 0.0
Process Equipment Group
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment		$ 72.3		72.3
Total				73.0
Milacron
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment				0.0
Total		9.5
Trade names
Finite-Lived Intangible Assets [Line Items]
Intangible asset impairment				8.6
Trade names | Process Equipment Group
Finite-Lived Intangible Assets [Line Items]
Intangible asset impairment		$ 0.7
Trade names | Milacron
Finite-Lived Intangible Assets [Line Items]
Intangible asset impairment				7.9
Technology, including patents
Finite-Lived Intangible Assets [Line Items]
Intangible asset impairment				1.6
Technology, including patents | Process Equipment Group
Finite-Lived Intangible Assets [Line Items]
Intangible asset impairment				0.0
Technology, including patents | Milacron
Finite-Lived Intangible Assets [Line Items]
Intangible asset impairment				$ 1.6