Quarterly report pursuant to Section 13 or 15(d)

Changes in Amount of Goodwill (Detail)

v2.4.0.8
Changes in Amount of Goodwill (Detail) (USD $)
In Millions, unless otherwise specified
 6 Months Ended
Jun. 30, 2013
Goodwill [Line Items]  
Balance, December 31, 2012 $ 2,290.4
Adjustments to initial purchase price allocation (0.4)
Foreign currency translation (11.4)
Tax benefits of stock options exercised (0.1)
Businesses sold (30.2)
Balance, June 30, 2013 2,248.3
U.S. Consumer Information Solutions [Member]
  
Goodwill [Line Items]  
Balance, December 31, 2012 947.7
Adjustments to initial purchase price allocation (0.4)
Foreign currency translation 0
Tax benefits of stock options exercised 0
Businesses sold (2.7)
Balance, June 30, 2013 944.6
International [Member]
  
Goodwill [Line Items]  
Balance, December 31, 2012 369.3
Adjustments to initial purchase price allocation 0
Foreign currency translation (11.1)
Tax benefits of stock options exercised 0
Businesses sold (1.4)
Balance, June 30, 2013 356.8
Workforce Solutions [Member]
  
Goodwill [Line Items]  
Balance, December 31, 2012 934.0
Adjustments to initial purchase price allocation 0
Foreign currency translation 0
Tax benefits of stock options exercised (0.1)
Businesses sold (26.1)
Balance, June 30, 2013 907.8
North America Personal Solutions [Member]
  
Goodwill [Line Items]  
Balance, December 31, 2012 1.8
Adjustments to initial purchase price allocation 0
Foreign currency translation 0
Tax benefits of stock options exercised 0
Businesses sold 0
Balance, June 30, 2013 1.8
North America Commercial Solutions [Member]
  
Goodwill [Line Items]  
Balance, December 31, 2012 37.6
Adjustments to initial purchase price allocation 0
Foreign currency translation (0.3)
Tax benefits of stock options exercised 0
Businesses sold 0
Balance, June 30, 2013 $ 37.3