v3.26.1
VARIABLE INTEREST ENTITIES - Schedule of Affordable Housing Tax Credit Investments (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Variable Interest Entity        
Income tax expense $ (168) $ (118) $ (301) $ (213)
Noninterest income 652 600 1,258 1,144
Net income 587 436 1,104 809
Variable Interest Entity, Not Primary Beneficiary | Net Income (Loss) Attributable To Parent, Net Benefit        
Variable Interest Entity        
Net income 29 24 53 50
Variable Interest Entity, Not Primary Beneficiary | Net benefit (expense) included in Income tax expense        
Variable Interest Entity        
Income tax expense 30 26 58 53
Variable Interest Entity, Not Primary Beneficiary | Tax credits recognized        
Variable Interest Entity        
Income tax expense 116 104 226 210
Variable Interest Entity, Not Primary Beneficiary | Other tax benefits recognized        
Variable Interest Entity        
Income tax expense 26 26 51 49
Variable Interest Entity, Not Primary Beneficiary | Amortization        
Variable Interest Entity        
Income tax expense (112) (104) (219) (206)
Variable Interest Entity, Not Primary Beneficiary | Net benefit (expense) included in Noninterest income        
Variable Interest Entity        
Noninterest income (1) (2) (5) (3)
Variable Interest Entity, Not Primary Beneficiary | Other income        
Variable Interest Entity        
Noninterest income 3 2 3 4
Variable Interest Entity, Not Primary Beneficiary | Allocated income (loss) on investments        
Variable Interest Entity        
Noninterest income $ (4) $ (4) $ (8) $ (7)