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Intangible Assets, Goodwill and Other (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Business Acquisition [Line Items]      
Deferred payments and contingent consideration related to business combinations $ 3.8 $ 4.1  
Goodwill 344.5   $ 336.7
Amortization of intangible assets $ 6.9 $ 12.3