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Noninterest Revenue and Noninterest Expense - Other income (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Mar. 31, 2023
Noninterest Income (Expense) [Abstract]          
Operating lease income $ 706 $ 695 $ 2,067 $ 2,166  
Losses on tax-oriented investments (78) (316) (115) (1,190)  
Estimated bargain purchase gain associated with the First Republic acquisition 0   103    
Estimated bargain purchase gain associated with the First Republic acquisition   100   2,812  
Gain related to the acquisition of CIFM 0 0 0 339  
Initial gain on the Visa share exchange $ 0 $ 0 $ 7,990 $ 0  
CIFM          
Schedule of Noninterest revenue [Line Items]          
Percentage interest acquired         51.00%