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INCOME TAXES - Narrative (Details) - Galaxy Digital Holdings, LP - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Entity Not Subject to Income Taxes, Difference in Bases, Amount | $ 1,500,000,000 | $ 995,000,000 |
Unrecognized tax benefits, interest on income taxes expense | 1,500,000 | 1,100,000 |
Income tax examination, interest accrued |  |  | $ 0
Income tax examination, penalties accrued | 0 | 0 | $ 0
Deferred tax assets, operating loss carryforwards, subject to expiration | $ 68,400,000 | $ 48,100,000 |

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