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ACQUISITIONS AND INVESTMENTS - Narrative (Details) - USD ($) $ in Millions | Aug. 07, 2023 | Sep. 30, 2022 | Mar. 31, 2022
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Boa Vista Servicos S |  |  |
Business Acquisition [Line Items] |  |  |
Cash consideration paid for business combination | $ 870 |  |
Payment for interest | $ 510 |  |
Previously owned percentage of investment | 10.00% |  |
Fair value of 10% investment | $ 89 |  |
Boa Vista Servicos S | Equifax do Brasil |  |  |
Business Acquisition [Line Items] |  |  |
Equifax do Brasil common shares issued | 176 |  |
Boa Vista Servicos S | Equifax Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Equifax do Brasil common shares issued | $ 95 |  |
Boa Vista Servicos S | Common Stock | Equifax do Brasil |  |  |
Business Acquisition [Line Items] |  |  |
Shares transferred for investment (in shares) | 2,171,615 |  |
Boa Vista Servicos S | Common Stock | Equifax Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Shares transferred for investment (in shares) | 479,725 |  |
Efficient Hire |  |  |
Business Acquisition [Line Items] |  |  |
Business acquisition, voting interests acquired (as a percent) |  |  | 100.00%
LawLogix |  |  |
Business Acquisition [Line Items] |  |  |
Business acquisition, voting interests acquired (as a percent) |  | 100.00% |

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