Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Loss) - Changes in OCI Components Pre- and After-tax (Details)

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Accumulated Other Comprehensive Income (Loss) - Changes in OCI Components Pre- and After-tax (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
After- tax    
Comprehensive income (loss) $ 6,405 $ 10,790
Total other comprehensive income (loss)    
Pretax    
Net change (164) 3,404
Tax effect    
Net change (105) (775)
After- tax    
Comprehensive income (loss) (269) 2,629
Debt Securities    
Pretax    
Net increase (decrease) in fair value 457 521
Net realized (gains) losses reclassified into earnings (10) 210
Net change 447 731
Tax effect    
Net increase (decrease) in fair value (117) (123)
Net realized (gains) losses reclassified into earnings 2 (53)
Net change (115) (176)
After- tax    
Net increase (decrease) in fair value 340 398
Net realized (gains) losses reclassified into earnings (8) 157
Comprehensive income (loss) 332 555
Debit Valuation Adjustments    
Pretax    
Net increase (decrease) in fair value (257) 9
Net realized (gains) losses reclassified into earnings 7 4
Net change (250) 13
Tax effect    
Net increase (decrease) in fair value 64 (2)
Net realized (gains) losses reclassified into earnings (2) (1)
Net change 62 (3)
After- tax    
Net increase (decrease) in fair value (193) 7
Net realized (gains) losses reclassified into earnings 5 3
Comprehensive income (loss) (188) 10
Derivatives    
Pretax    
Net increase (decrease) in fair value (1,065) 2,568
Net realized (gains) losses reclassified into earnings 508 156
Net change (557) 2,724
Tax effect    
Net increase (decrease) in fair value 268 (643)
Net realized (gains) losses reclassified into earnings (127) (39)
Net change 141 (682)
After- tax    
Net increase (decrease) in fair value (797) 1,925
Net realized (gains) losses reclassified into earnings 381 117
Comprehensive income (loss) (416) 2,042
Derivatives | Net interest income    
Pretax    
Net realized (gains) losses reclassified into earnings 458 161
Tax effect    
Net realized (gains) losses reclassified into earnings (115) (40)
After- tax    
Net realized (gains) losses reclassified into earnings 343 121
Derivatives | Market making and similar activities    
Pretax    
Net realized (gains) losses reclassified into earnings 59 0
Tax effect    
Net realized (gains) losses reclassified into earnings (14) 0
After- tax    
Net realized (gains) losses reclassified into earnings 45 0
Derivatives | Compensation and benefits expense    
Pretax    
Net realized (gains) losses reclassified into earnings (9) (5)
Tax effect    
Net realized (gains) losses reclassified into earnings 2 1
After- tax    
Net realized (gains) losses reclassified into earnings (7) (4)
Employee Benefit Plans    
Pretax    
Net realized (gains) losses reclassified into earnings 30 13
Net change 30 13
Tax effect    
Net realized (gains) losses reclassified into earnings (7) (3)
Net change (7) (3)
After- tax    
Net realized (gains) losses reclassified into earnings 23 10
Comprehensive income (loss) 23 10
Foreign Currency    
Pretax    
Net increase (decrease) in fair value 166 (77)
Net change 166 (77)
Tax effect    
Net increase (decrease) in fair value (186) 89
Net change (186) 89
After- tax    
Net increase (decrease) in fair value (20) 12
Comprehensive income (loss) $ (20) $ 12