BUSINESS COMBINATIONS - Schedule of Components of Identifiable Intangible Assets Acquired (Details) - USD ($) $ in Millions	Dec. 31, 2023	Jul. 03, 2023	Dec. 31, 2022
Robinhood Credit
Acquired Indefinite-lived Intangible Assets [Line Items]
Fair Value		$ 36
Developed technology
Acquired Indefinite-lived Intangible Assets [Line Items]
Useful Life	2 years 11 months 23 days		1 year 8 months 12 days
Developed technology | Robinhood Credit
Acquired Indefinite-lived Intangible Assets [Line Items]
Fair Value		$ 25
Useful Life		4 years
Customer relationships
Acquired Indefinite-lived Intangible Assets [Line Items]
Useful Life	7 years 14 days		8 years 7 months 13 days
Customer relationships | Robinhood Credit
Acquired Indefinite-lived Intangible Assets [Line Items]
Fair Value		$ 10
Useful Life		7 years
Trade names | Robinhood Credit
Acquired Indefinite-lived Intangible Assets [Line Items]
Fair Value		$ 1
Useful Life		1 year