Current report filing

Changes in Amount of Goodwill (Detail)

v2.4.0.8
Changes in Amount of Goodwill (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Goodwill [Line Items]    
Beginning Balance $ 1,961.2 $ 1,914.7
Acquisitions 321.3 75.6
Adjustments to initial purchase price allocation (1.0) 0.2
Foreign currency translation 8.9 3.9
Businesses sold   (33.2)
Ending Balance 2,290.4 1,961.2
US Consumer Information Solutions
    
Goodwill [Line Items]    
Beginning Balance 638.4 628.5
Acquisitions 309.3 10.1
Adjustments to initial purchase price allocation 0 (0.2)
Foreign currency translation 0 0
Businesses sold   0
Ending Balance 947.7 638.4
International
    
Goodwill [Line Items]    
Beginning Balance 348.5 346.9
Acquisitions 12.0 30.9
Adjustments to initial purchase price allocation 0 (0.1)
Foreign currency translation 8.8 4.0
Businesses sold   (33.2)
Ending Balance 369.3 348.5
Workforce Solutions
    
Goodwill [Line Items]    
Beginning Balance 935.0 899.9
Acquisitions 0 34.6
Adjustments to initial purchase price allocation (1.0) 0.5
Foreign currency translation 0 0
Businesses sold   0
Ending Balance 934.0 935.0
North America Personal Solutions
    
Goodwill [Line Items]    
Beginning Balance 1.8 1.8
Acquisitions 0 0
Adjustments to initial purchase price allocation 0 0
Foreign currency translation 0 0
Businesses sold   0
Ending Balance 1.8 1.8
North America Commercial Solutions
    
Goodwill [Line Items]    
Beginning Balance 37.5 37.6
Acquisitions 0 0
Adjustments to initial purchase price allocation 0 0
Foreign currency translation 0.1 (0.1)
Businesses sold   0
Ending Balance $ 37.6 $ 37.5