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Intangible Assets Table (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross $ 1,295.8   $ 1,293.4
Finite-Lived Intangible Assets, Accumulated Amortization (208.3)   (182.3)
Finite-Lived Intangible Assets, Net 1,087.5   1,111.1
Amortization of Intangible Assets 25.0 $ 24.9  
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 100.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 100.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 100.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 100.0    
Finite-Lived Intangible Assets, Amortization Expense, Year Five 100.0    
Computer Software, Intangible Asset [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 40.6   38.0
Finite-Lived Intangible Assets, Accumulated Amortization (22.9)   (20.1)
Finite-Lived Intangible Assets, Net 17.7   17.9
Customer Platforms - Intangible Assets [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 952.2   952.2
Finite-Lived Intangible Assets, Accumulated Amortization (141.1)   (123.5)
Finite-Lived Intangible Assets, Net 811.1   828.7
Customer Relationships - Intangible Assets [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 147.0   147.0
Finite-Lived Intangible Assets, Accumulated Amortization (19.0)   (16.5)
Finite-Lived Intangible Assets, Net 128.0   130.5
Technology-Based Intangible Assets [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 156.0   156.2
Finite-Lived Intangible Assets, Accumulated Amortization (25.3)   (22.2)
Finite-Lived Intangible Assets, Net $ 130.7   $ 134.0