GUARANTEES, LEASES AND COMMITMENTS - Restricted Cash (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 17,389	$ 13,422
Cash and due from banks
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	3,786	2,786
Deposits with banks, net of allowance
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 13,603	$ 10,636