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Variable Interest Entities and Securitizations - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Variable Interest Entity [Line Items]    
Amortization method qualified affordable housing investments, amortization $ 696 $ 701
Affordable housing tax credits 722 718
Amortization method qualified affordable housing investments 6,200 5,300
Qualified affordable housing investments, commitment 2,500 2,100
Assets $ 669,009 $ 490,144
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] Income tax provision Income tax provision
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Cash Flows [Extensible Enumeration] Income tax provision Income tax provision
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] Other assets Other assets
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 provision Income tax provision
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration] Income tax provision Income tax provision
Unconsolidated    
Variable Interest Entity [Line Items]    
Assets $ 7,922 $ 6,418
VIE, reporting entity involvement, maximum loss exposure 7,922 6,418
Consolidated    
Variable Interest Entity [Line Items]    
Assets 35,070 31,812
Affordable housing entities | Unconsolidated    
Variable Interest Entity [Line Items]    
Assets 6,485 5,544
Variable interest entity, nonconsolidated 18,200 18,100
VIE, reporting entity involvement, maximum loss exposure 6,485 5,544
Affordable housing entities | Consolidated    
Variable Interest Entity [Line Items]    
Assets 469 354
Entities that provide capital to low-income and rural communities | Unconsolidated    
Variable Interest Entity [Line Items]    
Assets 48 0
VIE, reporting entity involvement, maximum loss exposure 48 0
Entities that provide capital to low-income and rural communities | Consolidated    
Variable Interest Entity [Line Items]    
Assets 2,942 2,605
Other    
Variable Interest Entity [Line Items]    
Amortization method qualified affordable housing investments, amortization 118  
Affordable housing tax credits 85  
Amortization method qualified affordable housing investments 698  
Qualified affordable housing investments, commitment 154  
Other | Unconsolidated    
Variable Interest Entity [Line Items]    
Assets 1,389 874
VIE, reporting entity involvement, maximum loss exposure 1,389 874
Other | Consolidated    
Variable Interest Entity [Line Items]    
Assets $ 0 $ 0