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 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Segment Reporting Information [Line Items]        
Operating revenue $ 543.9 $ 490.4 $ 1,602.4 $ 1,450.1
Operating income 132.1 121.6 393.8 345.3
U.S. Consumer Information Solutions [Member]
       
Segment Reporting Information [Line Items]        
Operating revenue 233.3 202.0 681.1 577.0
Operating income 86.1 74.0 253.6 206.5
International [Member]
       
Segment Reporting Information [Line Items]        
Operating revenue 121.0 118.6 361.5 376.6
Operating income 33.1 34.7 106.6 98.7
Workforce Solutions [Member]
       
Segment Reporting Information [Line Items]        
Operating revenue 117.0 102.8 345.9 298.5
Operating income 28.6 23.6 81.7 66.1
North America Personal Solutions [Member]
       
Segment Reporting Information [Line Items]        
Operating revenue 51.4 45.5 151.6 135.1
Operating income 16.5 15.0 45.6 40.2
North America Commercial Solutions [Member]
       
Segment Reporting Information [Line Items]        
Operating revenue 21.2 21.5 62.3 62.9
Operating income 4.0 5.0 10.3 14.5
General Corporate Expenses
       
Segment Reporting Information [Line Items]        
Operating income $ (36.2) $ (30.7) $ (104.0) $ (80.7)