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 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Segment Reporting Information [Line Items]        
Operating revenue $ 535.8 $ 487.1 $ 1,058.5 $ 959.7
Operating income 132.7 114.6 261.7 223.7
U.S. Consumer Information Solutions
       
Segment Reporting Information [Line Items]        
Operating revenue 230.1 194.0 447.8 375.0
Operating income 88.1 70.8 167.5 132.5
International
       
Segment Reporting Information [Line Items]        
Operating revenue 119.5 130.8 240.5 258.0
Operating income 35.0 34.2 73.5 64.0
Workforce Solutions
       
Segment Reporting Information [Line Items]        
Operating revenue 115.2 96.3 228.9 195.7
Operating income 26.9 20.8 53.1 42.5
North America Personal Solutions
       
Segment Reporting Information [Line Items]        
Operating revenue 50.7 45.2 100.2 89.6
Operating income 15.1 12.5 29.1 25.2
North America Commercial Solutions
       
Segment Reporting Information [Line Items]        
Operating revenue 20.3 20.8 41.1 41.4
Operating income 2.8 4.4 6.3 9.5
General Corporate Expenses
       
Segment Reporting Information [Line Items]        
Operating income $ (35.2) $ (28.1) $ (67.8) $ (50.0)