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Acquisitions and Divestitures - Schedule of Business Combinations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 12, 2018
Dec. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]        
Goodwill   $ 1,139.5 $ 1,092.1 $ 1,157.8
Midco        
Business Acquisition [Line Items]        
Accounts receivable   3.7    
Inventories   3.9    
Property, plant and equipment   0.4    
Goodwill $ 29.4 29.4    
Trade accounts payable   (0.1)    
Other assets and liabilities, net   (1.4)    
Net cash consideration $ 35.9 $ 35.9