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ACCUMULATED OTHER COMPREHENSIVE LOSS (Parenthetical) $ in Millions	Dec. 31, 2025 USD ($)
Statement of Comprehensive Income [Abstract]
Unrecognized actuarial losses and prior service cost, accumulated tax	$ 1.1
Cash flow hedging transactions, tax	$ 0.5

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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

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- References

No definition available.

+ Details

Name:	us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration