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Goodwill and Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Finite-Lived Intangible Assets [Line Items]        
Amortization expense $ 47.8 $ 41.2 $ 144.3 $ 115.6
Estimated future amortization for the remainder of fiscal year 43.8   43.8  
Estimated future amortization expense in year one 143.5   143.5  
Estimated future amortization expense in year two 123.2   123.2  
Estimated future amortization expense in year three 80.2   80.2  
Estimated future amortization expense in year four 75.1   75.1  
Estimated future amortization expense thereafter $ 143.6   $ 143.6  
Minimum        
Finite-Lived Intangible Assets [Line Items]        
Finite-lived intangible asset, useful life     1 year  
Maximum        
Finite-Lived Intangible Assets [Line Items]        
Finite-lived intangible asset, useful life     20 years