v3.25.4
Securitizations and Variable Interest Entities, Income Statement Impacts for Affordable Housing and Renewable Energy Tax Credit Investments (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Involvement With Tax Credit VIEs Textual [Abstract]      
Total loans $ 986,167 $ 912,745  
Investment program, proportional amortization method, policy election [true false] true true true
VIEs that we do not consolidate [Member]      
Variable Interest Entity [Line Items]      
Income (loss) before income tax expense, proportional amortization method investments $ 165 $ 77 $ 31
Investment Program, Proportional Amortization Method, Applied, Non-Income-Tax-Related Activity and Other Return, Statement of Income or Comprehensive Income [Extensible Enumeration] Other Other Other
Investment Program Proportional Amortization Method Applied NonIncome Tax Related Activity And Other Return Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag true true true
Income (loss) before income tax expense, equity method investments $ (95) $ (143) $ (665)
Net income (loss) before income tax expense 70 (66) (634)
Income tax expense (benefit), proportional amortization of investments 3,382 2,971 1,650
Income tax expense (benefit), income tax credits and other income tax benefits (4,429) (3,990) (3,176)
Net expense (benefit) recognized within income tax expense (1,047) (1,019) (1,526)
Net income (loss) related to affordable housing and renewable energy tax credit investments $ 1,117 $ 953 $ 892
Involvement With Tax Credit VIEs Textual [Abstract]      
Investment program commitment, payment period 3 years 3 years  
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] Income tax expense (benefit) Income tax expense (benefit) Income tax expense (benefit)
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Income or Comprehensive Income [Extensible Enumeration] Income tax expense (benefit) Income tax expense (benefit) Income tax expense (benefit)
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, after Amortization, Statement of Income or Comprehensive Income [Extensible Enumeration] Income tax expense (benefit) Income tax expense (benefit) Income tax expense (benefit)
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, after Amortization, Statement of Cash Flows Extensible Enumeration Not Disclosed Flag true true true
VIEs that we do not consolidate [Member] | Accounting method, investment tax credit, deferral      
Variable Interest Entity [Line Items]      
Income (loss) before income tax expense, equity method investments $ (497) $ (401) $ (500)
VIEs that we do not consolidate [Member] | Accrued expenses and other liabilities [Member]      
Involvement With Tax Credit VIEs Textual [Abstract]      
Investment program, commitment 5,700 6,400  
VIEs that we do not consolidate [Member] | Tax credit structures [Member]      
Involvement With Tax Credit VIEs Textual [Abstract]      
Maximum exposure to loss 31,100 29,100  
VIEs that we do not consolidate [Member] | Tax credit structures [Member] | Unfunded equity and loan commitment [Member]      
Involvement With Tax Credit VIEs Textual [Abstract]      
Maximum exposure to loss 7,800 5,500  
VIEs that we do not consolidate [Member] | Carrying value [Member] | Tax credit structures [Member]      
Involvement With Tax Credit VIEs Textual [Abstract]      
Equity securities 21,200 21,700  
Total loans $ 2,000 $ 1,900