Quarterly report pursuant to Section 13 or 15(d)

Operating Revenue and Operating Income by Operating Segment (Detail)

v2.4.0.8
Operating Revenue and Operating Income by Operating Segment (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Segment Reporting Information [Line Items]        
Operating revenue $ 572.0 $ 520.0 $ 1,725.4 $ 1,539.2
Operating income 150.0 130.5 457.1 387.8
U.S. Consumer Information Solutions [Member]
       
Segment Reporting Information [Line Items]        
Operating revenue 253.1 219.8 757.9 647.7
Operating income 95.8 88.1 292.0 256.9
International [Member]
       
Segment Reporting Information [Line Items]        
Operating revenue 128.5 121.1 382.0 361.6
Operating income 38.6 33.1 110.5 106.6
Workforce Solutions [Member]
       
Segment Reporting Information [Line Items]        
Operating revenue 115.0 111.8 361.9 330.4
Operating income 34.5 28.4 110.2 81.3
North America Personal Solutions [Member]
       
Segment Reporting Information [Line Items]        
Operating revenue 52.3 46.1 154.9 137.2
Operating income 13.7 13.1 42.4 36.8
North America Commercial Solutions [Member]
       
Segment Reporting Information [Line Items]        
Operating revenue 23.1 21.2 68.7 62.3
Operating income 4.0 4.0 12.7 10.3
General Corporate Expenses [Member]
       
Segment Reporting Information [Line Items]        
Operating income $ (36.6) $ (36.2) $ (110.7) $ (104.1)