Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND INTANGIBLE ASSETS (Changes in Amount of Goodwill) (Detail)

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GOODWILL AND INTANGIBLE ASSETS (Changes in Amount of Goodwill) (Detail) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Mar. 31, 2015
Sep. 30, 2015
Goodwill [Line Items]      
Impairment of Intangible Assets (Excluding Goodwill) $ 0 $ 0  
Balance, December 31, 2014   2,606,800,000 $ 2,606,800,000
Acquisitions     0
Adjustments to initial purchase price allocation     0
Foreign currency translation     (25,800,000)
Tax benefits of stock options exercised     0
Balance, September 30, 2015 2,581,000,000   2,581,000,000
U.S. Information Solutions      
Goodwill [Line Items]      
Balance, December 31, 2014   1,120,600,000 1,120,600,000
Acquisitions     0
Adjustments to initial purchase price allocation     0
Foreign currency translation     0
Tax benefits of stock options exercised     0
Balance, September 30, 2015 1,120,600,000   1,120,600,000
International      
Goodwill [Line Items]      
Balance, December 31, 2014 [1]   487,000,000 487,000,000
Acquisitions     0
Adjustments to initial purchase price allocation     0
Foreign currency translation     (24,100,000)
Tax benefits of stock options exercised     0
Balance, September 30, 2015 462,900,000   462,900,000
Workforce Solutions      
Goodwill [Line Items]      
Balance, December 31, 2014   907,600,000 907,600,000
Acquisitions     0
Adjustments to initial purchase price allocation     0
Foreign currency translation     0
Tax benefits of stock options exercised     0
Balance, September 30, 2015 907,600,000   907,600,000
Personal Solutions      
Goodwill [Line Items]      
Balance, December 31, 2014 [1]   $ 91,600,000 91,600,000
Acquisitions     0
Adjustments to initial purchase price allocation     0
Foreign currency translation     (1,700,000)
Tax benefits of stock options exercised     0
Balance, September 30, 2015 $ 89,900,000   $ 89,900,000
[1] The December 31, 2014 balances have been recast to reflect the new organizational structure. As of December 31, 2014, the Personal Solutions goodwill includes $75.0 million of goodwill from the Europe reporting unit.