Annual report [Section 13 and 15(d), not S-K Item 405]

Outstanding Loans and Leases and Allowance for Credit Losses - Credit Card and Other Consumer - Credit Quality Indicators (Details)

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Outstanding Loans and Leases and Allowance for Credit Losses - Credit Card and Other Consumer - Credit Quality Indicators (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]      
Total $ 1,095,835 $ 1,053,732  
Total gross charge-offs 7,054 4,817 $ 3,439
Credit Card and Direct/ Indirect Consumer | Direct/indirect consumer      
Financing Receivable, Credit Quality Indicator [Line Items]      
Total 107,122 103,468  
Revolving Loans 51,561 48,908  
Originated in current fiscal year 22,076 21,547  
Originated in fiscal year before current fiscal year 14,621 15,794  
Originated two years before current fiscal year 10,305 10,231  
Originated three years before current fiscal year 5,343 3,428  
Originated four years before current fiscal year 1,701 1,846  
Prior 1,515 1,714  
Revolving Loans 51,561 48,908  
Total gross charge-offs 399 233  
Gross charge-offs, Revolving Loans 5 5  
Gross charge-offs, Originated in current fiscal year 46 32  
Gross charge-offs, Originated in fiscal year before current fiscal year 144 95  
Gross charge-offs, Originated two years before current fiscal year 109 53  
Gross charge-offs, Originated three years before current fiscal year 51 15  
Gross charge-offs, Originated four years before current fiscal year 12 10  
Gross charge-offs, Prior 32 23  
Gross charge-offs, Revolving Loans 5 5  
Loans and lease receivable, securities based lending 51,400 48,800  
Credit Card and Direct/ Indirect Consumer | Direct/indirect consumer | Less than 620      
Financing Receivable, Credit Quality Indicator [Line Items]      
Total 1,483 1,246  
Revolving Loans 10 11  
Originated in current fiscal year 249 292  
Originated in fiscal year before current fiscal year 452 428  
Originated two years before current fiscal year 433 336  
Originated three years before current fiscal year 243 85  
Originated four years before current fiscal year 53 55  
Prior 43 39  
Revolving Loans 10 11  
Credit Card and Direct/ Indirect Consumer | Direct/indirect consumer | Greater than or equal to 620 and less than 680      
Financing Receivable, Credit Quality Indicator [Line Items]      
Total 2,360 2,506  
Revolving Loans 9 11  
Originated in current fiscal year 735 937  
Originated in fiscal year before current fiscal year 699 799  
Originated two years before current fiscal year 523 501  
Originated three years before current fiscal year 272 121  
Originated four years before current fiscal year 67 73  
Prior 55 64  
Revolving Loans 9 11  
Credit Card and Direct/ Indirect Consumer | Direct/indirect consumer | Greater than or equal to 680 and less than 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Total 8,071 8,629  
Revolving Loans 42 48  
Originated in current fiscal year 3,038 3,451  
Originated in fiscal year before current fiscal year 2,179 2,582  
Originated two years before current fiscal year 1,587 1,641  
Originated three years before current fiscal year 825 462  
Originated four years before current fiscal year 226 244  
Prior 174 201  
Revolving Loans 42 48  
Credit Card and Direct/ Indirect Consumer | Direct/indirect consumer | Greater than or equal to 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Total 43,141 41,656  
Revolving Loans 67 74  
Originated in current fiscal year 17,889 16,761  
Originated in fiscal year before current fiscal year 11,240 11,802  
Originated two years before current fiscal year 7,635 7,643  
Originated three years before current fiscal year 3,908 2,707  
Originated four years before current fiscal year 1,319 1,417  
Prior 1,083 1,252  
Revolving Loans 67 74  
Credit Card and Direct/ Indirect Consumer | Direct/indirect consumer | Other internal credit metrics      
Financing Receivable, Credit Quality Indicator [Line Items]      
Total 52,067 49,431  
Revolving Loans 51,433 48,764  
Originated in current fiscal year 165 106  
Originated in fiscal year before current fiscal year 51 183  
Originated two years before current fiscal year 127 110  
Originated three years before current fiscal year 95 53  
Originated four years before current fiscal year 36 57  
Prior 160 158  
Revolving Loans 51,433 48,764  
Credit Card and Direct/ Indirect Consumer | Credit card      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 102,523 101,323  
Total Credit Card as of December 31, 2024 103,566 102,200  
Revolving Loans 102,523 101,323  
Revolving Loans Converted to Term Loans 1,043 877  
Gross charge-offs, Revolving Loans 4,188 3,013  
Gross charge-offs, Total Revolving Loans And Revolving Loans Converted to Term Loans 4,365 3,133  
Gross charge-offs, Revolving Loans 4,188 3,013  
Gross charge-offs, Revolving Loans Converted to Term Loans 177 120  
Credit Card and Direct/ Indirect Consumer | Credit card | Less than 620      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 5,511 5,030  
Total Credit Card as of December 31, 2024 5,866 5,338  
Revolving Loans 5,511 5,030  
Revolving Loans Converted to Term Loans 355 308  
Credit Card and Direct/ Indirect Consumer | Credit card | Greater than or equal to 620 and less than 680      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 11,250 11,345  
Total Credit Card as of December 31, 2024 11,580 11,623  
Revolving Loans 11,250 11,345  
Revolving Loans Converted to Term Loans 330 278  
Credit Card and Direct/ Indirect Consumer | Credit card | Greater than or equal to 680 and less than 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 34,743 34,538  
Total Credit Card as of December 31, 2024 35,037 34,777  
Revolving Loans 34,743 34,538  
Revolving Loans Converted to Term Loans 294 239  
Credit Card and Direct/ Indirect Consumer | Credit card | Greater than or equal to 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 51,019 50,410  
Total Credit Card as of December 31, 2024 51,083 50,462  
Revolving Loans 51,019 50,410  
Revolving Loans Converted to Term Loans 64 52  
Credit Card and Direct/ Indirect Consumer | Credit card | Other internal credit metrics      
Financing Receivable, Credit Quality Indicator [Line Items]      
Revolving Loans 0 0  
Total Credit Card as of December 31, 2024 0 0  
Revolving Loans 0 0  
Revolving Loans Converted to Term Loans $ 0 $ 0