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Intangible Assets Table (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Indefinite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount $ 1,116.5   $ 1,116.5   $ 1,115.5
Finite-Lived Intangible Assets, Accumulated Amortization (563.2)   (563.2)   (499.3)
Net Carrying Amount 553.3   553.3   616.2
Amortization of intangible assets 21.4 $ 21.5 64.2 $ 64.4  
Minimum [Member]          
Indefinite-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]          
Indefinite-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]          
Indefinite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 53.4   53.4   52.2
Finite-Lived Intangible Assets, Accumulated Amortization (47.7)   (47.7)   (43.2)
Net Carrying Amount 5.7   5.7   9.0
Customer Platforms - Intangible Assets [Member]          
Indefinite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 856.2   856.2   856.2
Finite-Lived Intangible Assets, Accumulated Amortization (412.3)   (412.3)   (364.7)
Net Carrying Amount 443.9   443.9   491.5
Customer Relationships - Intangible Assets [Member]          
Indefinite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 53.0   53.0   53.0
Finite-Lived Intangible Assets, Accumulated Amortization (22.2)   (22.2)   (19.7)
Net Carrying Amount 30.8   30.8   33.3
Technology-Based Intangible Assets [Member]          
Indefinite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 153.9   153.9   154.1
Finite-Lived Intangible Assets, Accumulated Amortization (81.0)   (81.0)   (71.7)
Net Carrying Amount $ 72.9   $ 72.9   $ 82.4