DERIVATIVES - Schedule of Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Notional amount	$ 303,721	$ 279,484
Derivative Assets
Total derivative assets	1,532	1,476
Less: Gross amounts offset in the Consolidated Balance Sheets	(342)	(391)
Less: Cash collateral applied	(494)	(677)
Total net derivatives included in the Consolidated Balance Sheets	696	408
Derivative Liabilities
Derivative Liabilities	1,258	1,710
Less: Gross amounts offset in the Consolidated Balance Sheets	(342)	(391)
Less: Cash collateral applied	(137)	(99)
Total net derivatives included in the Consolidated Balance Sheets	779	1,220
Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	236,363	210,407
Derivative Assets
Total derivative assets	1,166	1,074
Derivative Liabilities
Derivative Liabilities	1,233	1,705
Interest rate contracts
Derivative Assets
Total derivative assets	553	562
Derivative Liabilities
Derivative Liabilities	471	910
Interest rate contracts | Derivatives designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	67,358	69,077
Derivative Assets
Total derivative assets	366	402
Derivative Liabilities
Derivative Liabilities	25	5
Interest rate contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	180,977	171,193
Derivative Assets
Total derivative assets	187	160
Derivative Liabilities
Derivative Liabilities	446	905
Foreign exchange contracts
Derivative Assets
Total derivative assets	510	472
Derivative Liabilities
Derivative Liabilities	373	411
Foreign exchange contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	40,401	34,749
Derivative Assets
Total derivative assets	510	472
Derivative Liabilities
Derivative Liabilities	373	411
Commodities contracts
Derivative Assets
Total derivative assets	458	429
Derivative Liabilities
Derivative Liabilities	405	379
Commodities contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	10,974	1,136
Derivative Assets
Total derivative assets	458	429
Derivative Liabilities
Derivative Liabilities	405	379
TBA contracts
Derivative Assets
Total derivative assets	2	10
Derivative Liabilities
Derivative Liabilities	6	8
TBA contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	3,043	2,714
Derivative Assets
Total derivative assets	2	10
Derivative Liabilities
Derivative Liabilities	6	8
Other contracts
Derivative Assets
Total 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	968	615
Derivative Assets
Total derivative assets	9	3
Derivative Liabilities
Derivative Liabilities	$ 3	$ 2