GUARANTEES AND COMMITMENTS - Restricted Cash (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 16,122	$ 16,976
Asset pledged as collateral
Restricted Cash and Cash Equivalents Items [Line Items]
Financial instruments, owned, at fair value	2,800	1,800
Cash and due from banks
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	3,860	4,820
Deposits with banks, net of allowance
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 12,262	$ 12,156