Quarterly report pursuant to Section 13 or 15(d)

Operating Revenue and Operating Income by Operating Segment (Detail)

v2.4.0.6
Operating Revenue and Operating Income by Operating Segment (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Segment Reporting Information [Line Items]    
Operating revenue $ 566.5 $ 505.9
Operating income 149.0 128.3
U.S. Consumer Information Solutions [Member]
   
Segment Reporting Information [Line Items]    
Operating revenue 245.1 210.3
Operating income 91.9 81.4
International [Member]
   
Segment Reporting Information [Line Items]    
Operating revenue 123.7 121.0
Operating income 34.7 38.5
Workforce Solutions [Member]
   
Segment Reporting Information [Line Items]    
Operating revenue 123.7 108.9
Operating income 37.4 26.2
North America Personal Solutions [Member]
   
Segment Reporting Information [Line Items]    
Operating revenue 51.1 44.9
Operating income 14.5 11.3
North America Commercial Solutions [Member]
   
Segment Reporting Information [Line Items]    
Operating revenue 22.9 20.8
Operating income 4.9 3.5
General Corporate Expenses
   
Segment Reporting Information [Line Items]    
Operating income $ (34.4) $ (32.6)