Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Gains and Losses on Derivatives and Hedged Items Designated in Fair Value Hedges (Details)

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Derivatives - Gains and Losses on Derivatives and Hedged Items Designated in Fair Value Hedges (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative $ (58) $ (872) $ (548) $ (1,102)
Hedged Item 38 837 517 1,059
Interest rate risk on long-term debt        
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative (486) (3,550) (3,590) (242)
Hedged Item 481 3,516 3,571 211
Interest rate and foreign currency risk        
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative 279 107 623 115
Hedged Item (285) (104) (614) (112)
Interest rate and foreign currency risk | Interest expense        
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative   (1)   7
Interest rate and foreign currency risk | Interest Income        
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative 8 1 17 1
Interest rate and foreign currency risk | Market making and similar activities        
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative 273 103 597 105
Interest rate risk on available-for-sale securities        
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative 315 1,880 2,805 (1,147)
Hedged Item (324) (1,884) (2,826) 1,132
Price risk on commodity inventory | Interest Income        
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative (166) 691 (386) 172
Hedged Item 166 (691) 386 (172)
Accumulated Other Comprehensive Income (Loss) | Interest rate and foreign currency risk        
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative $ (2) $ 4 $ 9 $ 2