Equifax Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Changes in Amount of Goodwill (Detail)

Changes in Amount of Goodwill (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended			6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012 U.S. Consumer Information Solutions	Dec. 31, 2011 U.S. Consumer Information Solutions	Jun. 30, 2012 International	Jun. 30, 2012 Workforce Solutions	Jun. 30, 2012 North America Personal Solutions	Dec. 31, 2011 North America Personal Solutions	Jun. 30, 2012 North America Commercial Solutions	Dec. 31, 2011 North America Commercial Solutions
Goodwill [Line Items]
Beginning Balance	$ 1,961.2	$ 638.4	$ 638.4	$ 348.5	$ 935.0	$ 1.8	$ 1.8	$ 37.5	$ 37.5
Adjustments to initial purchase price allocation	0.2				0.2
Foreign currency translation	1.1			1.1
Tax benefits of stock options exercised	(1.2)				(1.2)
Ending Balance	$ 1,961.3	$ 638.4	$ 638.4	$ 349.6	$ 934.0	$ 1.8	$ 1.8	$ 37.5	$ 37.5

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

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-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details