Annual report [Section 13 and 15(d), not S-K Item 405]

Securitizations and Other Variable Interest Entities - Mortgage and Home Equity Securitizations (Details)

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Securitizations and Other Variable Interest Entities - Mortgage and Home Equity Securitizations (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
On-balance sheet assets        
Trading account assets $ 314,460 $ 277,354    
Debt securities carried at fair value 358,607 276,852    
Held-to-maturity securities 558,713 594,591    
Loans and leases 1,095,835 1,053,732    
Allowance for loan and lease losses (13,240) (13,342) $ (12,682) $ (12,387)
All other assets 162,056 160,875    
Total assets 3,261,519 3,180,151  
Total liabilities 2,965,960 2,888,505    
Consolidated VIEs        
On-balance sheet assets        
Trading account assets 5,575 6,054    
Loans and leases 19,144 18,276    
Allowance for loan and lease losses (919) (826)    
All other assets 319 269    
Total assets 24,119 23,773    
Total liabilities 11,807 11,432    
Agency | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 7,353 8,190    
On-balance sheet assets        
All other assets 0 0    
Total assets 7,353 8,190    
Principal balance outstanding 69,018 76,134    
Agency | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 1,132 1,164    
On-balance sheet assets        
Trading account assets 1,132 1,171    
Loans and leases 0 0    
Allowance for loan and lease losses 0 0    
All other assets 0 0    
Total assets 1,132 1,171    
Total liabilities 0 7    
Agency | Senior securities: | Unconsolidated VIEs        
On-balance sheet assets        
Trading account assets 126 235    
Debt securities carried at fair value 2,222 2,541    
Held-to-maturity securities 5,005 5,414    
Residential Mortgage | Prime and Alt-A | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 84 92    
On-balance sheet assets        
All other assets 3 4    
Total assets 13 17    
Principal balance outstanding 12,590 13,963    
Residential Mortgage | Prime and Alt-A | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 0 0    
On-balance sheet assets        
Trading account assets 0 0    
Loans and leases 0 0    
Allowance for loan and lease losses 0 0    
All other assets 0 0    
Total assets 0 0    
Total liabilities 0 0    
Residential Mortgage | Prime and Alt-A | Senior securities: | Unconsolidated VIEs        
On-balance sheet assets        
Trading account assets 10 13    
Debt securities carried at fair value 0 0    
Held-to-maturity securities 0 0    
Residential Mortgage | Subprime | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 301 657    
On-balance sheet assets        
All other assets 23 23    
Total assets 451 384    
Principal balance outstanding 4,180 4,508    
Residential Mortgage | Subprime | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 0 0    
On-balance sheet assets        
Trading account assets 0 0    
Loans and leases 0 0    
Allowance for loan and lease losses 0 0    
All other assets 0 0    
Total assets 0 0    
Total liabilities 0 0    
Residential Mortgage | Subprime | Senior securities: | Unconsolidated VIEs        
On-balance sheet assets        
Trading account assets 12 20    
Debt securities carried at fair value 416 341    
Held-to-maturity securities 0 0    
Home Equity | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 0 0    
On-balance sheet assets        
All other assets 0 0    
Total assets 0 0    
Principal balance outstanding 187 252    
Home Equity | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 10 12    
On-balance sheet assets        
Trading account assets 0 0    
Loans and leases 22 31    
Allowance for loan and lease losses 6 7    
All other assets 1 1    
Total assets 29 39    
Total liabilities 19 27    
Home Equity | Senior securities: | Unconsolidated VIEs        
On-balance sheet assets        
Trading account assets 0 0    
Debt securities carried at fair value 0 0    
Held-to-maturity securities 0 0    
Commercial Mortgage        
On-balance sheet assets        
Debt securities carried at fair value 25,613      
Commercial Mortgage | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 1,640 1,558    
On-balance sheet assets        
All other assets 41 79    
Total assets 1,541 1,436    
Principal balance outstanding 90,222 80,078    
Commercial Mortgage | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 0 0    
On-balance sheet assets        
Trading account assets 0 0    
Loans and leases 0 0    
Allowance for loan and lease losses 0 0    
All other assets 0 0    
Total assets 0 0    
Total liabilities 0 0    
Commercial Mortgage | Senior securities: | Unconsolidated VIEs        
On-balance sheet assets        
Trading account assets 328 70    
Debt securities carried at fair value 0 0    
Held-to-maturity securities $ 1,172 $ 1,287