Quarterly report pursuant to Section 13 or 15(d)

Purchased Intangible Assets (Detail)

v2.3.0.15
Purchased Intangible Assets (Detail) (USD $)
In Millions
Sep. 30, 2011
Dec. 31, 2010
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross $ 1,072.2 $ 1,053.0
Accumulated Amortization (504.8) (459.1)
Net 567.4 593.9
Purchased data files
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 315.4 339.2
Accumulated Amortization (234.8) (240.7)
Net 80.6 98.5
Acquired software and technology
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 64.2 55.0
Accumulated Amortization (39.3) (33.3)
Net 24.9 21.7
Customer relationships
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 518.0 489.2
Accumulated Amortization (121.8) (97.1)
Net 396.2 392.1
Proprietary database
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 125.0 125.0
Accumulated Amortization (90.3) (74.4)
Net 34.7 50.6
Non-compete agreements
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 9.1 7.2
Accumulated Amortization (3.0) (1.4)
Net 6.1 5.8
Trade names and other intangible assets
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross 40.5 37.4
Accumulated Amortization (15.6) (12.2)
Net $ 24.9 $ 25.2