Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Loss) - Change in Accumulated OCI (Details)

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Accumulated Other Comprehensive Income (Loss) - Change in Accumulated OCI (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance $ 291,646 $ 273,197
Net change (269) 2,629
Ending balance 293,552 280,196
Accumulated Other Comprehensive Income (Loss)    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance (17,788) (21,156)
Ending balance (18,057) (18,527)
Debt Securities    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance (2,410) (2,983)
Net change 332 555
Ending balance (2,078) (2,428)
Debit Valuation Adjustments    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance (1,567) (881)
Net change (188) 10
Ending balance (1,755) (871)
Derivatives    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance (8,016) (11,935)
Net change (416) 2,042
Ending balance (8,432) (9,893)
Employee Benefit Plans    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance (4,748) (4,309)
Net change 23 10
Ending balance (4,725) (4,299)
Foreign Currency    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance (1,047) (1,048)
Net change (20) 12
Ending balance $ (1,067) $ (1,036)