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Intangible Assets Table (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Indefinite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount $ 1,124.3   $ 1,124.3   $ 1,117.7
Finite-Lived Intangible Assets, Accumulated Amortization (646.8)   (646.8)   (584.9)
Net Carrying Amount 477.5   477.5   532.8
Amortization of intangible assets 20.8 $ 21.4 62.1 $ 64.2  
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 60.9   60.9   54.2
Finite-Lived Intangible Assets, Accumulated Amortization (51.7)   (51.7)   (49.2)
Net Carrying Amount 9.2   9.2   5.0
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 (475.7)   (475.7)   (428.2)
Net Carrying Amount 380.5   380.5   428.0
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 (25.6)   (25.6)   (23.1)
Net Carrying Amount 27.4   27.4   29.9
Technology-Based Intangible Assets [Member]          
Indefinite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 154.2   154.2   154.3
Finite-Lived Intangible Assets, Accumulated Amortization (93.8)   (93.8)   (84.4)
Net Carrying Amount $ 60.4   $ 60.4   $ 69.9