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

Quarterly report pursuant to Section 13 or 15(d)

Purchased Intangible Assets (Detail)

Purchased Intangible Assets (Detail) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	$ 1,048.3	$ 1,053.0
Accumulated Amortization	(488.5)	(459.1)
Net	559.8	593.9
Purchased data files
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	321.8	339.2
Accumulated Amortization	(235.1)	(240.7)
Net	86.7	98.5
Acquired software and technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	56.5	55.0
Accumulated Amortization	(38.2)	(33.3)
Net	18.3	21.7
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	497.8	489.2
Accumulated Amortization	(113.4)	(97.1)
Net	384.4	392.1
Proprietary Database
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	125.0	125.0
Accumulated Amortization	(85.0)	(74.4)
Net	40.0	50.6
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	8.7	7.2
Accumulated Amortization	(2.4)	(1.4)
Net	6.3	5.8
Trade names and other intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	38.5	37.4
Accumulated Amortization	(14.4)	(12.2)
Net	$ 24.1	$ 25.2

- Definition

Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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