Quarterly report pursuant to Section 13 or 15(d)

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
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
On-balance sheet assets        
Trading account assets $ 318,364 $ 277,354    
Debt securities carried at fair value 323,119 276,852    
Held-to-maturity securities 586,899 594,591    
Loans and leases 1,049,156 1,053,732    
Allowance for loan and lease losses (13,213) (13,342) $ (12,514) $ (12,682)
All other assets 160,323 160,875    
Total assets 3,273,803 3,180,151 $ 3,194,657  
Total liabilities 2,980,251 2,888,505    
Consolidated VIEs        
On-balance sheet assets        
Trading account assets 5,838 6,054    
Loans and leases 19,250 18,276    
Allowance for loan and lease losses (920) (826)    
All other assets 256 269    
Total assets 24,424 23,773    
Total liabilities 11,562 11,432    
Agency | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 7,945 8,190    
On-balance sheet assets        
All other assets 0 0    
Total assets 7,945 8,190    
Principal balance outstanding 74,377 76,134    
Agency | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 1,367 1,164    
On-balance sheet assets        
Trading account assets 1,367 1,171    
Loans and leases 0 0    
Allowance for loan and lease losses 0 0    
All other assets 0 0    
Total assets 1,367 1,171    
Total liabilities 0 7    
Agency | Senior securities: | Unconsolidated VIEs        
On-balance sheet assets        
Trading account assets 187 235    
Debt securities carried at fair value 2,433 2,541    
Held-to-maturity securities 5,325 5,414    
Residential Mortgage | Prime and Alt-A | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 87 92    
On-balance sheet assets        
All other assets 3 4    
Total assets 13 17    
Principal balance outstanding 13,700 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 612 657    
On-balance sheet assets        
All other assets 22 23    
Total assets 341 384    
Principal balance outstanding 4,398 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 20 20    
Debt securities carried at fair value 299 341    
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 221 252    
Home Equity | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 12 12    
On-balance sheet assets        
Trading account assets 0 0    
Loans and leases 29 31    
Allowance for loan and lease losses 7 7    
All other assets 1 1    
Total assets 37 39    
Total liabilities 25 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 10,586      
Commercial Mortgage | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 1,460 1,558    
On-balance sheet assets        
All other assets 47 79    
Total assets 1,370 1,436    
Principal balance outstanding 77,079 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 22 70    
Debt securities carried at fair value 0 0    
Held-to-maturity securities $ 1,301 $ 1,287