DERIVATIVES - Schedule of Derivative Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Notional Amount	$ 278,332	$ 279,484
Derivative Assets
Derivative assets	1,477	1,476
Less: Gross amounts offset in the Consolidated Balance Sheets	(411)	(391)
Less: Cash collateral applied	(306)	(677)
Total net derivatives presented in the Consolidated Balance Sheets	760	408
Derivative Liabilities
Derivative liabilities	1,657	1,710
Less: Gross amounts offset in the Consolidated Balance Sheets	(411)	(391)
Less: Cash collateral applied	(363)	(99)
Total net derivatives presented in the Consolidated Balance Sheets	883	1,220
Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	206,192	210,407
Derivative Assets
Derivative assets	1,193	1,074
Derivative Liabilities
Derivative liabilities	1,647	1,705
Interest rate contracts
Derivative Assets
Derivative assets	459	562
Derivative Liabilities
Derivative liabilities	684	910
Interest rate contracts | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Notional Amount	1,500
Interest rate contracts | Derivatives designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	72,140	69,077
Derivative Assets
Derivative assets	284	402
Derivative Liabilities
Derivative liabilities	10	5
Interest rate contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	163,936	171,193
Derivative Assets
Derivative assets	175	160
Derivative Liabilities
Derivative liabilities	674	905
Foreign exchange contracts
Derivative Assets
Derivative assets	318	472
Derivative Liabilities
Derivative liabilities	326	411
Foreign exchange contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	36,876	34,749
Derivative Assets
Derivative assets	318	472
Derivative Liabilities
Derivative liabilities	326	411
Commodities contracts
Derivative Assets
Derivative assets	689	429
Derivative Liabilities
Derivative liabilities	634	379
Commodities contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	1,133	1,136
Derivative Assets
Derivative assets	689	429
Derivative Liabilities
Derivative liabilities	634	379
TBA contracts
Derivative Assets
Derivative assets	2	10
Derivative Liabilities
Derivative liabilities	10	8
TBA contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	3,167	2,714
Derivative Assets
Derivative assets	2	10
Derivative Liabilities
Derivative liabilities	10	8
Other contracts
Derivative Assets
Derivative assets	9	3
Derivative Liabilities
Derivative liabilities	3	2
Other contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	1,080	615
Derivative Assets
Derivative assets	9	3
Derivative Liabilities
Derivative liabilities	$ 3	$ 2