Annual report pursuant to Section 13 and 15(d)

Changes in Amount of Goodwill (Detail)

v2.4.0.6
Changes in Amount of Goodwill (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
US Consumer Information Solutions
Dec. 31, 2010
US Consumer Information Solutions
Dec. 31, 2011
International
Dec. 31, 2010
International
Dec. 31, 2011
TALX Workforce Solutions
Dec. 31, 2010
TALX Workforce Solutions
Dec. 31, 2011
North America Personal Solutions
Dec. 31, 2010
North America Personal Solutions
Dec. 31, 2009
North America Personal Solutions
Dec. 31, 2011
North America Commercial Solutions
Dec. 31, 2010
North America Commercial Solutions
Goodwill [Line Items]                          
Beginning Balance $ 1,914.7 $ 1,943.2 $ 628.5 $ 667.8 $ 346.9 $ 335.7 $ 899.9 $ 900.6 $ 1.8 $ 1.8 $ 1.8 $ 37.6 $ 37.3
Acquisitions 75.6 47.5 10.1 41.0 30.9 6.5 34.6            
Adjustments to initial purchase price allocation 0.2 (1.5) (0.2) (0.8) (0.1)   0.5 (0.7)          
Foreign currency translation 3.9 5.0     4.0 4.7           (0.1) 0.3
Businesses sold (33.2) (79.5)   (79.5) (33.2)                
Ending Balance $ 1,961.2 $ 1,914.7 $ 638.4 $ 628.5 $ 348.5 $ 346.9 $ 935.0 $ 899.9 $ 1.8 $ 1.8 $ 1.8 $ 37.5 $ 37.6