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Intangible Assets Table (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount $ 1,115.7   $ 1,115.5
Accumulated Amortization (520.6)   (499.3)
Net Carrying Amount 595.1   616.2
Amortization of intangible assets 21.4 $ 21.5  
Minimum [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Amortization Expense, Current Fiscal Year 80.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 80.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 80.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 80.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Five 80.0    
Maximum [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Amortization Expense, Current Fiscal Year 85.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 85.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 85.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 85.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Five 85.0    
Capitalized Computer Software, Intangible Asset [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 52.4   52.2
Accumulated Amortization (44.6)   (43.2)
Net Carrying Amount 7.8   9.0
Customer Platforms - Intangible Assets [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 856.2   856.2
Accumulated Amortization (380.6)   (364.7)
Net Carrying Amount 475.6   491.5
Customer Relationships - Intangible Assets [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 53.0   53.0
Accumulated Amortization (20.5)   (19.7)
Net Carrying Amount 32.5   33.3
Technology-Based Intangible Assets [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 154.1   154.1
Accumulated Amortization (74.9)   (71.7)
Net Carrying Amount $ 79.2   $ 82.4