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, 2022
Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance $ 270,066 $ 272,924
Net change (8,313) (1,816)
Ending balance 266,617 274,000
Accumulated Other Comprehensive Income (Loss)    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance (5,104) (1,656)
Ending balance (13,417) (3,472)
Debt Securities    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance 3,045 5,122
Net change (3,447) (840)
Ending balance (402) 4,282
Debit Valuation Adjustments    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance (1,636) (1,992)
Net change 261 116
Ending balance (1,375) (1,876)
Derivatives    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance (1,880) 426
Net change (5,179) (1,114)
Ending balance (7,059) (688)
Employee Benefit Plans    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance (3,642) (4,266)
Net change 24 51
Ending balance (3,618) (4,215)
Foreign Currency    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance (991) (946)
Net change 28 (29)
Ending balance $ (963) $ (975)