DERIVATIVES - Schedule of Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Notional amount	$ 309,553	$ 250,495
Derivative Assets
Total derivative assets	1,593	1,839
Less: Gross amounts offset in the Consolidated Balance Sheets	(471)	(623)
Less: Cash collateral applied	(682)	(374)
Total net derivatives presented in the Consolidated Balance Sheets	440	842
Derivative Liabilities
Derivative Liabilities	2,183	3,111
Less: Gross amounts offset in the Consolidated Balance Sheets	(471)	(623)
Less: Cash collateral applied	(150)	(579)
Total net derivatives presented in the Consolidated Balance Sheets	1,562	1,909
Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	222,658	208,245
Derivative Assets
Total derivative assets	1,420	1,823
Derivative Liabilities
Derivative Liabilities	2,139	3,058
Interest rate contracts
Derivative Assets
Total derivative assets	464	347
Derivative Liabilities
Derivative Liabilities	1,149	1,632
Interest rate contracts | Derivatives designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	86,895	42,250
Derivative Assets
Total derivative assets	173	16
Derivative Liabilities
Derivative Liabilities	44	53
Interest rate contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	185,993	174,384
Derivative Assets
Total derivative assets	291	331
Derivative Liabilities
Derivative Liabilities	1,105	1,579
Foreign exchange contracts
Derivative Assets
Total derivative assets	434	527
Derivative Liabilities
Derivative Liabilities	378	519
Foreign exchange contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	32,528	29,475
Derivative Assets
Total derivative assets	434	527
Derivative Liabilities
Derivative Liabilities	378	519
Commodities contracts
Derivative Assets
Total derivative assets	685	953
Derivative Liabilities
Derivative Liabilities	640	942
Commodities contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	1,251	1,103
Derivative Assets
Total derivative assets	685	953
Derivative Liabilities
Derivative Liabilities	640	942
TBA contracts
Derivative Assets
Total derivative assets	3	7
Derivative Liabilities
Derivative Liabilities	16	14
TBA contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	2,337	2,370
Derivative Assets
Total derivative assets	3	7
Derivative Liabilities
Derivative Liabilities	16	14
Other contracts
Derivative Assets
Total derivative assets	7	5
Derivative Liabilities
Derivative Liabilities	0	4
Other contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	549	913
Derivative Assets
Total derivative assets	7	5
Derivative Liabilities
Derivative Liabilities	$ 0	$ 4