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
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
On-balance sheet assets            
Trading account assets $ 306,466   $ 277,354      
Debt securities carried at fair value 301,051   276,852      
Held-to-maturity securities 577,402   594,591      
Loans and leases 1,056,785   1,053,732      
Allowance for loan and lease losses (13,238) $ (13,213) (13,342) $ (12,950) $ (12,514) $ (12,682)
All other assets 157,898   160,875      
Total assets 3,257,996   3,180,151 $ 3,123,198    
Total liabilities 2,964,104   2,888,505      
Consolidated VIEs            
On-balance sheet assets            
Trading account assets 5,647   6,054      
Loans and leases 19,827   18,276      
Allowance for loan and lease losses (917)   (826)      
All other assets 281   269      
Total assets 24,838   23,773      
Total liabilities 12,502   11,432      
Agency | Unconsolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 7,836   8,190      
On-balance sheet assets            
All other assets 0   0      
Total assets 7,836   8,190      
Principal balance outstanding 72,470   76,134      
Agency | Consolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 1,115   1,164      
On-balance sheet assets            
Trading account assets 1,115   1,171      
Loans and leases 0   0      
Allowance for loan and lease losses 0   0      
All other assets 0   0      
Total assets 1,115   1,171      
Total liabilities 0   7      
Agency | Senior securities: | Unconsolidated VIEs            
On-balance sheet assets            
Trading account assets 275   235      
Debt securities carried at fair value 2,345   2,541      
Held-to-maturity securities 5,216   5,414      
Residential Mortgage | Prime and Alt-A | Unconsolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 86   92      
On-balance sheet assets            
All other assets 2   4      
Total assets 12   17      
Principal balance outstanding 13,336   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 602   657      
On-balance sheet assets            
All other assets 22   23      
Total assets 332   384      
Principal balance outstanding 4,454   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 290   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 208   252      
Home Equity | Consolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 11   12      
On-balance sheet assets            
Trading account assets 0   0      
Loans and leases 27   31      
Allowance for loan and lease losses 6   7      
All other assets 1   1      
Total assets 34   39      
Total liabilities 23   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 12,032          
Commercial Mortgage | Unconsolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 1,622   1,558      
On-balance sheet assets            
All other assets 32   79      
Total assets 1,532   1,436      
Principal balance outstanding 88,813   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 238   70      
Debt securities carried at fair value 0   0      
Held-to-maturity securities $ 1,262   $ 1,287