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Variable Interest Entities and Securitizations - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Variable Interest Entity [Line Items]      
Amortization method qualified affordable housing investments, amortization $ 701 $ 682  
Affordable housing tax credits 718 721  
Amortization method qualified affordable housing investments 5,300 5,500  
Qualified affordable housing investments, commitment 2,100 2,300  
Assets $ 490,144 $ 478,464  
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration] Income tax provision Income tax provision Income tax provision
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 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 Income tax provision
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] Other assets Other assets Other assets
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] Income tax provision Income tax provision Income tax provision
Unconsolidated      
Variable Interest Entity [Line Items]      
Assets $ 6,418 $ 6,175  
VIE, reporting entity involvement, maximum loss exposure 6,418 6,175  
Consolidated      
Variable Interest Entity [Line Items]      
Assets 31,812 33,288  
Affordable housing entities | Unconsolidated      
Variable Interest Entity [Line Items]      
Assets 5,544 5,726  
Total assets of the unconsolidated VIE investment funds 18,100 18,600  
VIE, reporting entity involvement, maximum loss exposure 5,544 5,726  
Affordable housing entities | Consolidated      
Variable Interest Entity [Line Items]      
Assets 354 297  
Entities that provide capital to low-income and rural communities | Unconsolidated      
Variable Interest Entity [Line Items]      
Assets 0 0  
VIE, reporting entity involvement, maximum loss exposure 0 0  
Entities that provide capital to low-income and rural communities | Consolidated      
Variable Interest Entity [Line Items]      
Assets 2,605 2,498  
Other      
Variable Interest Entity [Line Items]      
Amortization method qualified affordable housing investments, amortization 28    
Affordable housing tax credits 21    
Amortization method qualified affordable housing investments 562    
Qualified affordable housing investments, commitment 110    
VIE, reporting entity involvement, maximum loss exposure   449  
Other | Unconsolidated      
Variable Interest Entity [Line Items]      
Assets 874 449  
VIE, reporting entity involvement, maximum loss exposure 874 449  
Other | Consolidated      
Variable Interest Entity [Line Items]      
Assets $ 0 $ 0