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

REVENUE - Remaining Performance Obligation (Details)

REVENUE - Remaining Performance Obligation (Details) $ in Millions	Mar. 31, 2019 USD ($)
Revenue Recognition and Deferred Revenue [Abstract]
Total remaining performance obligation	$ 172.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Revenue Recognition and Deferred Revenue [Abstract]
Total remaining performance obligation	$ 38.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation period	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue Recognition and Deferred Revenue [Abstract]
Total remaining performance obligation	$ 55.2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation period	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue Recognition and Deferred Revenue [Abstract]
Total remaining performance obligation	$ 24.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue Recognition and Deferred Revenue [Abstract]
Total remaining performance obligation	$ 54.7