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Goodwill and Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Finite-Lived Intangible Assets [Line Items]        
Amortization expense $ 41.2 $ 50.4 $ 115.6 $ 132.2
Estimated future amortization for the remainder of fiscal year 2020 41.9   41.9  
Estimated future amortization expense in fiscal year 2021 114.4   114.4  
Estimated future amortization expense in fiscal year 2022 68.7   68.7  
Estimated future amortization expense in fiscal year 2023 65.2   65.2  
Estimated future amortization expense in fiscal year 2024 34.3   34.3  
Estimated future amortization expense thereafter $ 103.4   $ 103.4  
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