XML 15 R37.htm IDEA: XBRL DOCUMENT v2.4.0.6

Segment Information - Additional Information (Detail)	Mar. 31, 2012 Segment
Segment Reporting Disclosure [Line Items]
Number of reportable segments	5

X

- Definition

Number of Operating Segments

+ References

No definition available.

+ Details

Name:	efx_NumberOfOperatingSegments
Namespace Prefix:	efx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	efx_SegmentReportingDisclosureLineItems
Namespace Prefix:	efx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration