| ACQUISITIONS AND INVESTMENTS - Summary of Consideration Transferred (Details) - Boa Vista Servicos S $ in Millions | Aug. 07, 2023  USD ($)  shares | 
|---|---|
| Business Acquisition [Line Items] | |
| Cash transferred | $ 509.7 | 
| Equifax do Brasil common shares issued | 176.4 | 
| Equifax Brazilian Depositary Receipts ("Equifax BDRs") issued | 94.6 | 
| Fair value of 10% investment | 88.9 | 
| Total value of consideration | $ 869.6 | 
| Common Stock | Equifax do Brasil | |
| Business Acquisition [Line Items] | |
| Shares transferred for investment (in shares) | shares | 2,171,615 | 
| Common Stock | Equifax Inc. | |
| Business Acquisition [Line Items] | |
| Shares transferred for investment (in shares) | shares | 479,725 | 
| X | ||||||||||
| 
- Definition Business Combination, Consideration Transferred, Equity Interests Issuable No definition available. 
 | 
| X | ||||||||||
| 
- Definition Business Combination, Consideration Transferred, Fair Value of Investment No definition available. 
 | 
| X | ||||||||||
| 
- Definition Number of shares of equity interests issued or issuable to acquire entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
 | 
| X | ||||||||||
| 
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
 | 
| X | ||||||||||
| 
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
 | 
| X | ||||||||||
| 
- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
 | 
| X | ||||||||||
| 
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
 | 
| X | ||||||||||
| 
- Details 
 | 
| X | ||||||||||
| 
- Details 
 | 
| X | ||||||||||
| 
- Details 
 | 
| X | ||||||||||
| 
- Details 
 |