REVENUES - Revenue Disaggregated By Revenue Source (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Interest on corporate cash and investments	$ 68	$ 1
Margin interest	53	35
Interest on segregated cash and cash equivalents and deposits	45	1
Securities lending, net	26	24
Cash sweep	22	0
Interest expenses related to credit facilities	(6)	(6)
Total net interest revenues	208	55
Total net revenues	441	299
Options
Disaggregation of Revenue [Line Items]
Revenues	133	127
Cryptocurrencies
Disaggregation of Revenue [Line Items]
Revenues	38	54
Equities
Disaggregation of Revenue [Line Items]
Revenues	27	36
Other
Disaggregation of Revenue [Line Items]
Revenues	9	1
Transaction-based revenues
Disaggregation of Revenue [Line Items]
Revenues	207	218
Other revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 26	$ 26