VARIABLE INTEREST ENTITIES - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024
Variable Interest Entity [Line Items]
Other assets	[1],[2]	$ 14,428	$ 14,349
Debt securities available for sale	[3]	35,697	32,765
Other liabilities	[1],[2]	5,439	6,090
Total mortgage-backed securities
Variable Interest Entity [Line Items]
Debt securities available for sale		32,484	29,055
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Other assets		2,967	2,902
Other liabilities		1,066	1,109
Variable Interest Entity, Not Primary Beneficiary | Total mortgage-backed securities
Variable Interest Entity [Line Items]
Securitizations of mortgage loans		112	329
Debt securities available for sale		780	708
Variable Interest Entity, Not Primary Beneficiary | Low Income Housing Tax Credit Partnerships
Variable Interest Entity [Line Items]
Other assets		2,800	2,600
Variable Interest Entity, Not Primary Beneficiary | Other Investments
Variable Interest Entity [Line Items]
Other assets		17	23
Other liabilities		2	4
Variable Interest Entity, Not Primary Beneficiary | Renewable Energy Investments
Variable Interest Entity [Line Items]
Other assets		201	269
Commitments to extend credit | Variable Interest Entity, Not Primary Beneficiary | Special Purpose Entities
Variable Interest Entity [Line Items]
Undrawn commitments to extend credit		4,000	$ 2,800
Renewable Energy Wind Investments | Renewable Energy Entities
Variable Interest Entity [Line Items]
Undrawn commitments to extend credit		$ 6

[1] See Note 1 for information regarding updates to the Consolidated Balance Sheets during 2025.

[2] Includes amounts in consolidated VIEs. See Note 9 for additional information.

[3] Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.