DERIVATIVES - Schedule of Derivative Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Derivative Assets
Derivative assets	$ 1,679	$ 1,839
Less: Gross amounts offset in the Consolidated Balance Sheets	(613)	(623)
Less: Cash collateral applied	(497)	(374)
Total net derivative fair values presented in the Consolidated Balance Sheets	569	842
Derivative Liabilities
Derivative liabilities	2,504	3,111
Less: Gross amounts offset in the Consolidated Balance Sheets	(613)	(623)
Less: Cash collateral applied	(187)	(579)
Total net derivative fair values presented in the Consolidated Balance Sheets	1,704	1,909
Derivatives not designated as hedging instruments:
Derivative Assets
Derivative assets	1,580	1,823
Derivative Liabilities
Derivative liabilities	2,486	3,058
Interest rate contracts
Derivative Assets
Derivative assets	377	347
Derivative Liabilities
Derivative liabilities	1,294	1,632
Interest rate contracts | Derivatives designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	58,750	42,250
Derivative Assets
Derivative assets	99	16
Derivative Liabilities
Derivative liabilities	18	53
Interest rate contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	195,041	174,384
Derivative Assets
Derivative assets	278	331
Derivative Liabilities
Derivative liabilities	1,276	1,579
Foreign exchange contracts
Derivative Assets
Derivative assets	456	527
Derivative Liabilities
Derivative liabilities	407	519
Foreign exchange contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	30,187	29,475
Derivative Assets
Derivative assets	456	527
Derivative Liabilities
Derivative liabilities	407	519
Commodities contracts
Derivative Assets
Derivative assets	819	953
Derivative Liabilities
Derivative liabilities	789	942
Commodities contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	998	1,103
Derivative Assets
Derivative assets	819	953
Derivative Liabilities
Derivative liabilities	789	942
TBA contracts
Derivative Assets
Derivative assets	14	7
Derivative Liabilities
Derivative liabilities	14	14
TBA contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	3,406	2,370
Derivative Assets
Derivative assets	14	7
Derivative Liabilities
Derivative liabilities	14	14
Other contracts
Derivative Assets
Derivative assets	13	5
Derivative Liabilities
Derivative liabilities	0	4
Other contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional Amount	1,261	913
Derivative Assets
Derivative assets	13	5
Derivative Liabilities
Derivative liabilities	$ 0	$ 4