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Acquisitions Business Combinations Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Acquired Indefinite-lived Intangible Assets [Line Items]      
Payments to Acquire Businesses, Net of Cash Acquired $ 0.0 $ 85.5  
2020 Acquisitions      
Acquired Indefinite-lived Intangible Assets [Line Items]      
Goodwill, Acquired During Period     $ 129.5
Business Acquisition, Goodwill, Expected Tax Deductible Amount     $ 77.1