Business Combination Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Dec. 04, 2017
Business Acquisition [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual		$ 37.2
Business Combination, Consideration Transferred	$ 140.7
Repayment of Krausz debt		0.0	$ (13.2)	$ 0.0
Payments for (Proceeds from) Other Investing Activities		$ 127.5
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		12 years
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment	0.3
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets	$ 0.3
Property, Plant and Equipment [Member]
Business Acquisition [Line Items]
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment					$ 0.4