DERIVATIVES - Schedule of Derivative Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Notional Amount	$ 300,242	$ 309,553
Derivative Assets
Derivative assets	1,350	1,593
Less: Gross amounts offset in the Consolidated Balance Sheets	(396)	(471)
Less: Cash collateral applied	(587)	(682)
Total net derivatives presented in the Consolidated Balance Sheets	367	440
Derivative Liabilities
Derivative liabilities	2,059	2,183
Less: Gross amounts offset in the Consolidated Balance Sheets	(396)	(471)
Less: Cash collateral applied	(116)	(150)
Total net derivatives presented in the Consolidated Balance Sheets	1,547	1,562
Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	223,511	222,658
Derivative Assets
Derivative assets	1,099	1,420
Derivative Liabilities
Derivative liabilities	1,992	2,139
Interest rate contracts
Derivative Assets
Derivative assets	479	464
Derivative Liabilities
Derivative liabilities	1,298	1,149
Interest rate contracts | Derivatives designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	76,731	86,895
Derivative Assets
Derivative assets	251	173
Derivative Liabilities
Derivative liabilities	67	44
Interest rate contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	188,971	185,993
Derivative Assets
Derivative assets	228	291
Derivative Liabilities
Derivative liabilities	1,231	1,105
Foreign exchange contracts
Derivative Assets
Derivative assets	345	434
Derivative Liabilities
Derivative liabilities	285	378
Foreign exchange contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	29,770	32,528
Derivative Assets
Derivative assets	345	434
Derivative Liabilities
Derivative liabilities	285	378
Commodities contracts
Derivative Assets
Derivative assets	516	685
Derivative Liabilities
Derivative liabilities	467	640
Commodities contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	1,157	1,251
Derivative Assets
Derivative assets	516	685
Derivative Liabilities
Derivative liabilities	467	640
TBA contracts
Derivative Assets
Derivative assets	3	3
Derivative Liabilities
Derivative liabilities	8	16
TBA contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	2,722	2,337
Derivative Assets
Derivative assets	3	3
Derivative Liabilities
Derivative liabilities	8	16
Other contracts
Derivative Assets
Derivative assets	7	7
Derivative Liabilities
Derivative liabilities	1	0
Other contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	891	549
Derivative Assets
Derivative assets	7	7
Derivative Liabilities
Derivative liabilities	$ 1	$ 0