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DIGITAL ASSETS - Narrative (Details) - Galaxy Digital Holdings, LP - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Crypto Asset, Activity [Line Items]
Blockchain rewards generated from proprietary staking activities	$ 6.2	$ 12.3	$ 30.0	$ 4.0	$ 7.5
Net realized gain / (loss)			0.0	0.0	$ (44.6)
Restricted By Lock-Up Schedules
Crypto Asset, Activity [Line Items]
Restricted crypto assets	$ 41.4		59.9	68.0
Restricted By Lock-Up Schedules | Maximum
Crypto Asset, Activity [Line Items]
Restriction duration	3 years
Crypto Assets Staked
Crypto Asset, Activity [Line Items]
Restricted crypto assets	$ 266.8		$ 371.7	$ 163.3
Restriction duration			11 days	11 days
Crypto Assets Staked | Maximum
Crypto Asset, Activity [Line Items]
Restriction duration			11 days
Crypto Asset, Decentralized Finance Protocols
Crypto Asset, Activity [Line Items]
Percentage of digital assets issued			41.00%
Bitcoin
Crypto Asset, Activity [Line Items]
Percentage of digital assets issued	40.00%		18.00%
Aave
Crypto Asset, Activity [Line Items]
Percentage of digital assets issued	15.00%		10.00%

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476168/350-60-50-3

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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-Name Accounting Standards Codification
-Section 50
-Paragraph 3
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476168/350-60-50-3

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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-Section 50
-Paragraph 3
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476168/350-60-50-3

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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-Name Accounting Standards Codification
-Section 50
-Paragraph 3
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476168/350-60-50-3

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476168/350-60-50-3

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476168/350-60-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
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