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Intangible Assets (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Intangible Assets (Textual) [Abstract]      
Accumulated amortization $ 615.3 $ 407.8  
Amortization expense for intangible assets $ 218.1 184.5 $ 142.8
Maximum [Member]      
Intangible Assets (Textual) [Abstract]      
Finite-Lived Intangible Asset, Useful Life 40 years    
Minimum [Member]      
Intangible Assets (Textual) [Abstract]      
Finite-Lived Intangible Asset, Useful Life 3 years    
Database and credit files [Member]      
Intangible Assets (Textual) [Abstract]      
Accumulated amortization $ 185.8 135.8  
Database and credit files [Member] | Maximum [Member]      
Intangible Assets (Textual) [Abstract]      
Finite-Lived Intangible Asset, Useful Life 15 years    
Database and credit files [Member] | Minimum [Member]      
Intangible Assets (Textual) [Abstract]      
Finite-Lived Intangible Asset, Useful Life 12 years    
Internal Use Software [Member]      
Intangible Assets (Textual) [Abstract]      
Accumulated amortization $ 308.3 187.3  
Internal Use Software [Member] | Maximum [Member]      
Intangible Assets (Textual) [Abstract]      
Finite-Lived Intangible Asset, Useful Life 7 years    
Internal Use Software [Member] | Minimum [Member]      
Intangible Assets (Textual) [Abstract]      
Finite-Lived Intangible Asset, Useful Life 3 years    
Customer relationships [Member]      
Intangible Assets (Textual) [Abstract]      
Accumulated amortization $ 66.4 46.0  
Customer relationships [Member] | Maximum [Member]      
Intangible Assets (Textual) [Abstract]      
Finite-Lived Intangible Asset, Useful Life 20 years    
Customer relationships [Member] | Minimum [Member]      
Intangible Assets (Textual) [Abstract]      
Finite-Lived Intangible Asset, Useful Life 10 years    
Trademarks, copyrights and patents [Member]      
Intangible Assets (Textual) [Abstract]      
Accumulated amortization $ 53.9 37.9  
Finite-Lived Intangible Asset, Useful Life 40 years    
Noncompete agreements [Member]      
Intangible Assets (Textual) [Abstract]      
Accumulated amortization $ 0.9 $ 0.8