DERIVATIVES - Schedule of Derivative Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Derivative Assets
Derivative assets	$ 2,371	$ 1,509
Less: Gross amounts offset in the Consolidated Balance Sheets	(461)	(235)
Less: Cash collateral applied	(241)	(58)
Total net derivative fair values presented in the Consolidated Balance Sheets	1,669	1,216
Derivative Liabilities
Derivative liabilities	3,003	922
Less: Gross amounts offset in the Consolidated Balance Sheets	(461)	(235)
Less: Cash collateral applied	(1,538)	(490)
Total net derivative fair values presented in the Consolidated Balance Sheets	1,004	197
Derivatives not designated as hedging instruments:
Derivative Assets
Derivative assets	2,271	1,497
Derivative Liabilities
Derivative liabilities	3,002	920
Interest rate contracts
Derivative Assets
Derivative assets	179	692
Derivative Liabilities
Derivative liabilities	858	176
Interest rate contracts | Derivatives designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	22,930	23,450
Derivative Assets
Derivative assets	100	12
Derivative Liabilities
Derivative liabilities	1	2
Interest rate contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	188,383	142,987
Derivative Assets
Derivative assets	79	680
Derivative Liabilities
Derivative liabilities	857	174
Foreign exchange contracts
Derivative Assets
Derivative assets	523	263
Derivative Liabilities
Derivative liabilities	494	231
Foreign exchange contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	26,102	21,336
Derivative Assets
Derivative assets	523	263
Derivative Liabilities
Derivative liabilities	494	231
Commodities contracts
Derivative Assets
Derivative assets	1,630	508
Derivative Liabilities
Derivative liabilities	1,621	505
Commodities contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	897	514
Derivative Assets
Derivative assets	1,630	508
Derivative Liabilities
Derivative liabilities	1,621	505
TBA contracts
Derivative Assets
Derivative assets	21	8
Derivative Liabilities
Derivative liabilities	19	8
TBA contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	4,482	7,776
Derivative Assets
Derivative assets	21	8
Derivative Liabilities
Derivative liabilities	19	8
Other contracts
Derivative Assets
Derivative assets	18	38
Derivative Liabilities
Derivative liabilities	11	2
Other contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	2,360	3,555
Derivative Assets
Derivative assets	18	38
Derivative Liabilities
Derivative liabilities	$ 11	$ 2