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Intangible Assets Table (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount $ 1,110.7   $ 1,111.0
Accumulated Amortization (267.9)   (246.5)
Net Carrying Amount 842.8   864.5
Amortization of intangible assets 21.8 $ 25.0  
Finite-Lived Intangible Assets, Amortization Expense, Current Fiscal Year 87.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 87.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 87.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 87.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Five 87.0    
Computer Software, Intangible Asset [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 45.8   45.8
Accumulated Amortization (29.2)   (27.6)
Net Carrying Amount 16.6   18.2
Customer Platforms - Intangible Assets [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 856.2   856.2
Accumulated Amortization (190.3)   (174.4)
Net Carrying Amount 665.9   681.8
Customer Relationships - Intangible Assets [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 53.0   53.0
Accumulated Amortization (10.3)   (9.4)
Net Carrying Amount 42.7   43.6
Technology-Based Intangible Assets [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 155.7   156.0
Accumulated Amortization (38.1)   (35.1)
Net Carrying Amount $ 117.6   $ 120.9