Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations - Additional Information (Detail)

v2.4.0.8
Discontinued Operations - Additional Information (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
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Cash received from divestitures     $ 47.5 $ 2.5
Revenue from discontinued operations 0 23.9 9.3 63.3
Pretax income from discontinued operations   1.6   6.1
Gain on divestitures     18.4  
Income tax benefit from disposals     18.1  
Discontinued Operation Income Loss From Discontinued Operation Income Tax Benefit Current     14.3  
Us Consumer Information Solutions [Member]
       
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Cash received from divestitures     47.5  
Talent Management Services [Member]
       
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Escrow Receivable From Sale Of Business     $ 3.5