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ACCUMULATED OTHER COMPREHENSIVE LOSS (Parenthetical) - USD ($) $ in Millions | Jun. 30, 2015 | Dec. 31, 2014
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Unrecognized actuarial losses and prior service cost related to pension and other postretirement benefit plans, accumulated tax | $ 146.7 | $ 150.1
Cash flow hedging transactions, accumulated tax | $ 1.0 | $ 1.1

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- Definition Accumulated tax effect of cash flow hedging transactions. + References No definition available. + Details
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Namespace Prefix: | efx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The tax effect from the total of net (gain) loss, prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. + References No definition available. + Details
Name: | efx_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansTax
Namespace Prefix: | efx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant