Annual report pursuant to Section 13 and 15(d)

Purchased Intangible Assets (Detail)

v2.4.0.6
Purchased Intangible Assets (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross $ 1,077.4 $ 1,053.0
Accumulated Amortization (527.2) (459.1)
Net 550.2 593.9
Purchased data files
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 316.2 339.2
Accumulated Amortization (240.5) (240.7)
Net 75.7 98.5
Acquired software and technology
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 68.3 55.0
Accumulated Amortization (41.1) (33.3)
Net 27.2 21.7
Customer relationships
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 518.2 489.2
Accumulated Amortization (130.3) (97.1)
Net 387.9 392.1
Proprietary database
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 125.0 125.0
Accumulated Amortization (95.5) (74.4)
Net 29.5 50.6
Non-compete agreements
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 9.0 7.2
Accumulated Amortization (3.1) (1.4)
Net 5.9 5.8
Trade names and other intangible assets
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 40.7 37.4
Accumulated Amortization (16.7) (12.2)
Net $ 24.0 $ 25.2