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Business Combination Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
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 $ 0.0 (13.2)
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      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets   0.9    
Inventories 17.0 0.6    
Receivables 6.9 0.5    
Tradenames 4.6      
Goodwill 80.4 12.1    
Accounts payable and other current liabilities (5.5) (0.8)    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities   (1.1)    
Consideration paid   19.7   $ 140.7
Customer-Related Intangible Assets [Member]        
Business Acquisition [Line Items]        
Patents $ 8.7 2.1    
Noncompete Agreements        
Business Acquisition [Line Items]        
Patents   0.1    
Developed Technology Rights        
Business Acquisition [Line Items]        
Patents   3.5    
Trademarks and Trade Names [Member]        
Business Acquisition [Line Items]        
Tradenames   $ 1.8