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Intangible Assets Table (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Indefinite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount $ 1,119.7   $ 1,123.9
Finite-Lived Intangible Assets, Accumulated Amortization (683.5)   (667.2)
Net Carrying Amount 436.2   456.7
Amortization of intangible assets 20.6 $ 20.7  
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    
Capitalized Computer Software, Intangible Asset [Member]      
Indefinite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 61.0   60.9
Finite-Lived Intangible Assets, Accumulated Amortization (53.5)   (52.6)
Net Carrying Amount 7.5   8.3
Customer Platforms - Intangible Assets [Member]      
Indefinite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 856.2   856.2
Finite-Lived Intangible Assets, Accumulated Amortization (507.4)   (491.6)
Net Carrying Amount 348.8   364.6
Customer Relationships - Intangible Assets [Member]      
Indefinite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 53.0   53.0
Finite-Lived Intangible Assets, Accumulated Amortization (27.4)   (26.5)
Net Carrying Amount 25.6   26.5
Technology-Based Intangible Assets [Member]      
Indefinite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 149.5   153.8
Finite-Lived Intangible Assets, Accumulated Amortization (95.2)   (96.5)
Net Carrying Amount $ 54.3   $ 57.3