BUSINESS COMBINATIONS - Schedule of Acquisition Date Fair Value of Consideration Transferred (Details) - USD ($) $ in Millions	Sep. 30, 2023	Jul. 03, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Prepaid expenses		$ 1
Goodwill	$ 164		$ 100
Robinhood credit
Business Acquisition [Line Items]
Cash and cash equivalents		14
Receivable from users, net		3
Other current assets		23
Goodwill		64
Intangible assets		36
Accounts payable and accrued expenses		(36)
Other non-current liabilities		(1)
Net assets acquired		$ 104