| DISCONTINUED OPERATIONS - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended | 1 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|
| Dec. 31, 2011 | Sep. 30, 2010 | Jun. 30, 2010 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Apr. 30, 2010
 US Consumer Information Solutions
 APPRO Loan Origination Software | Jul. 31, 2010
 US Consumer Information Solutions
 Direct Marketing Services Division | |
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||||||||
| Proceeds received from sale of businesses | $ 2.5 | $ 2.5 | $ 181.7 | $ 72.0 | $ 117.0 | |||
| Revenue from discontinued operations | 42.1 | |||||||
| Pretax income from discontinued operations | 65.4 | |||||||
| Gain on divestitures | 14.9 | 12.3 | ||||||
| Income from discontinued operations, net of tax | $ 1.5 | $ 1.5 | $ 31.5 | |||||
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- Definition Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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