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Intangible Assets Table (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount $ 1,116.1   $ 1,116.1   $ 1,115.5
Accumulated Amortization (541.9)   (541.9)   (499.3)
Net Carrying Amount 574.2   574.2   616.2
Amortization of intangible assets 21.4 $ 21.4 42.8 $ 42.9  
Minimum [Member]          
Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Amortization Expense, Current Fiscal Year 80.0   80.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 80.0   80.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 80.0   80.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 80.0   80.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Five 80.0   80.0    
Maximum [Member]          
Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Amortization Expense, Current Fiscal Year 85.0   85.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 85.0   85.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 85.0   85.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 85.0   85.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Five 85.0   85.0    
Capitalized Computer Software, Intangible Asset [Member]          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 52.9   52.9   52.2
Accumulated Amortization (46.2)   (46.2)   (43.2)
Net Carrying Amount 6.7   6.7   9.0
Customer Platforms - Intangible Assets [Member]          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 856.2   856.2   856.2
Accumulated Amortization (396.4)   (396.4)   (364.7)
Net Carrying Amount 459.8   459.8   491.5
Customer Relationships - Intangible Assets [Member]          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 53.0   53.0   53.0
Accumulated Amortization (21.4)   (21.4)   (19.7)
Net Carrying Amount 31.6   31.6   33.3
Technology-Based Intangible Assets [Member]          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 154.0   154.0   154.1
Accumulated Amortization (77.9)   (77.9)   (71.7)
Net Carrying Amount $ 76.1   $ 76.1   $ 82.4