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

Outstanding Loans and Leases and Allowance for Credit Losses - Commercial - Credit Quality Indicators (Details)

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Outstanding Loans and Leases and Allowance for Credit Losses - Commercial - 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]      
Loans and leases $ 1,095,835 $ 1,053,732  
Total gross charge-offs 7,054 4,817 $ 3,439
Estimate of Fair Value Measurement      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 4,249 3,569  
Small Business Card Loans | United States      
Financing Receivable, Credit Quality Indicator [Line Items]      
Total gross charge-offs 489 317  
Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 630,839 593,767  
Total gross charge-offs 1,935 844 $ 478
Commercial | Estimate of Fair Value Measurement      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 4,028 3,326  
Commercial | United States      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 386,990 358,931  
Originated in current fiscal year 49,744 42,120  
Originated in fiscal year before current fiscal year 34,253 44,606  
Originated two years before current fiscal year 35,050 28,446  
Originated three years before current fiscal year 21,600 13,858  
Originated four years before current fiscal year 10,512 12,309  
Prior 36,172 31,265  
Revolving Loans 199,659 186,327  
Total gross charge-offs 439 191  
Gross charge-offs, Originated in current fiscal year 3 5  
Gross charge-offs, Originated in fiscal year before current fiscal year 122 38  
Gross charge-offs, Originated two years before current fiscal year 80 29  
Gross charge-offs, Originated three years before current fiscal year 19 4  
Gross charge-offs, Originated four years before current fiscal year 4 2  
Gross charge-offs, Prior 63 27  
Gross charge-offs, Revolving Loans 148 86  
Commercial | United States | Pass rated      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 374,380 347,563  
Originated in current fiscal year 49,587 41,842  
Originated in fiscal year before current fiscal year 33,352 43,290  
Originated two years before current fiscal year 34,015 27,738  
Originated three years before current fiscal year 20,801 13,495  
Originated four years before current fiscal year 10,172 11,772  
Prior 34,176 29,923  
Revolving Loans 192,277 179,503  
Commercial | United States | Reservable criticized      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 12,610 11,368  
Originated in current fiscal year 157 278  
Originated in fiscal year before current fiscal year 901 1,316  
Originated two years before current fiscal year 1,035 708  
Originated three years before current fiscal year 799 363  
Originated four years before current fiscal year 340 537  
Prior 1,996 1,342  
Revolving Loans 7,382 6,824  
Commercial | Non United States      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 137,518 124,581  
Originated in current fiscal year 27,141 17,103  
Originated in fiscal year before current fiscal year 14,448 15,994  
Originated two years before current fiscal year 12,365 15,550  
Originated three years before current fiscal year 12,060 2,495  
Originated four years before current fiscal year 1,336 3,108  
Prior 6,883 5,559  
Revolving Loans 63,285 64,772  
Total gross charge-offs 81 37  
Gross charge-offs, Originated in current fiscal year 0 0  
Gross charge-offs, Originated in fiscal year before current fiscal year 41 0  
Gross charge-offs, Originated two years before current fiscal year 22 8  
Gross charge-offs, Originated three years before current fiscal year 16 7  
Gross charge-offs, Originated four years before current fiscal year 0 1  
Gross charge-offs, Prior 0 0  
Gross charge-offs, Revolving Loans 2 21  
Commercial | Non United States | Pass rated      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 135,720 122,931  
Originated in current fiscal year 27,119 17,053  
Originated in fiscal year before current fiscal year 14,268 15,810  
Originated two years before current fiscal year 12,220 15,256  
Originated three years before current fiscal year 11,750 2,405  
Originated four years before current fiscal year 1,328 2,950  
Prior 6,777 5,485  
Revolving Loans 62,258 63,972  
Commercial | Non United States | Reservable criticized      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 1,798 1,650  
Originated in current fiscal year 22 50  
Originated in fiscal year before current fiscal year 180 184  
Originated two years before current fiscal year 145 294  
Originated three years before current fiscal year 310 90  
Originated four years before current fiscal year 8 158  
Prior 106 74  
Revolving Loans 1,027 800  
Commercial | Commercial real estate      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 65,730 72,878  
Originated in current fiscal year 5,463 5,011  
Originated in fiscal year before current fiscal year 5,146 16,896  
Originated two years before current fiscal year 14,007 13,538  
Originated three years before current fiscal year 11,090 4,808  
Originated four years before current fiscal year 3,499 9,418  
Prior 16,682 12,921  
Revolving Loans 9,843 10,286  
Total gross charge-offs 894 254  
Gross charge-offs, Originated in current fiscal year 0 2  
Gross charge-offs, Originated in fiscal year before current fiscal year 0 0  
Gross charge-offs, Originated two years before current fiscal year 57 4  
Gross charge-offs, Originated three years before current fiscal year 83 0  
Gross charge-offs, Originated four years before current fiscal year 62 59  
Gross charge-offs, Prior 663 189  
Gross charge-offs, Revolving Loans 29 0  
Commercial | Commercial real estate | Pass rated      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 55,607 64,150  
Originated in current fiscal year 5,422 4,877  
Originated in fiscal year before current fiscal year 4,935 16,147  
Originated two years before current fiscal year 10,755 11,810  
Originated three years before current fiscal year 8,990 4,026  
Originated four years before current fiscal year 2,911 7,286  
Prior 13,310 10,127  
Revolving Loans 9,284 9,877  
Commercial | Commercial real estate | Reservable criticized      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 10,123 8,728  
Originated in current fiscal year 41 134  
Originated in fiscal year before current fiscal year 211 749  
Originated two years before current fiscal year 3,252 1,728  
Originated three years before current fiscal year 2,100 782  
Originated four years before current fiscal year 588 2,132  
Prior 3,372 2,794  
Revolving Loans 559 409  
Commercial | Commercial real estate | United States      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 59,600 66,800  
Commercial | Commercial real estate | Non United States      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 6,100 6,100  
Commercial | Commercial Lease Financing      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 15,708 14,854  
Originated in current fiscal year 3,911 4,197  
Originated in fiscal year before current fiscal year 3,771 3,099  
Originated two years before current fiscal year 2,532 2,419  
Originated three years before current fiscal year 1,973 1,365  
Originated four years before current fiscal year 1,056 1,206  
Prior 2,465 2,568  
Revolving Loans 0 0  
Total gross charge-offs 2 2  
Gross charge-offs, Originated in current fiscal year 0 0  
Gross charge-offs, Originated in fiscal year before current fiscal year 0 0  
Gross charge-offs, Originated two years before current fiscal year 0 1  
Gross charge-offs, Originated three years before current fiscal year 2 1  
Gross charge-offs, Originated four years before current fiscal year 0 0  
Gross charge-offs, Prior 0 0  
Gross charge-offs, Revolving Loans 0 0  
Commercial | Commercial Lease Financing | Pass rated      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 15,417 14,688  
Originated in current fiscal year 3,902 4,188  
Originated in fiscal year before current fiscal year 3,675 3,077  
Originated two years before current fiscal year 2,465 2,373  
Originated three years before current fiscal year 1,921 1,349  
Originated four years before current fiscal year 1,033 1,174  
Prior 2,421 2,527  
Revolving Loans 0 0  
Commercial | Commercial Lease Financing | Reservable criticized      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 291 166  
Originated in current fiscal year 9 9  
Originated in fiscal year before current fiscal year 96 22  
Originated two years before current fiscal year 67 46  
Originated three years before current fiscal year 52 16  
Originated four years before current fiscal year 23 32  
Prior 44 41  
Revolving Loans 0 0  
Commercial | U.S. small business commercial | United States      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 10,249 9,415  
Originated in current fiscal year 1,934 1,892  
Originated in fiscal year before current fiscal year 1,970 1,894  
Originated two years before current fiscal year 1,754 1,645  
Originated three years before current fiscal year 1,417 876  
Originated four years before current fiscal year 629 784  
Prior 2,097 1,893  
Revolving Loans 448 431  
Total gross charge-offs 30 43  
Gross charge-offs, Originated in current fiscal year 0 1  
Gross charge-offs, Originated in fiscal year before current fiscal year 1 2  
Gross charge-offs, Originated two years before current fiscal year 2 2  
Gross charge-offs, Originated three years before current fiscal year 1 19  
Gross charge-offs, Originated four years before current fiscal year 6 3  
Gross charge-offs, Prior 7 4  
Gross charge-offs, Revolving Loans 13 12  
Commercial | U.S. small business commercial | United States | Pass rated      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 9,806 9,031  
Originated in current fiscal year 1,926 1,886  
Originated in fiscal year before current fiscal year 1,887 1,830  
Originated two years before current fiscal year 1,650 1,550  
Originated three years before current fiscal year 1,302 836  
Originated four years before current fiscal year 604 721  
Prior 1,992 1,780  
Revolving Loans 445 428  
Commercial | U.S. small business commercial | United States | Reservable criticized      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 443 384  
Originated in current fiscal year 8 6  
Originated in fiscal year before current fiscal year 83 64  
Originated two years before current fiscal year 104 95  
Originated three years before current fiscal year 115 40  
Originated four years before current fiscal year 25 63  
Prior 105 113  
Revolving Loans 3 3  
Commercial | Term Loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 616,195 580,659  
Originated in current fiscal year 88,193 70,323  
Originated in fiscal year before current fiscal year 59,588 82,489  
Originated two years before current fiscal year 65,708 61,598  
Originated three years before current fiscal year 48,140 23,402  
Originated four years before current fiscal year 17,032 26,825  
Prior 64,299 54,206  
Revolving Loans 273,235 261,816  
Total gross charge-offs 1,446 527  
Gross charge-offs, Originated in current fiscal year 3 8  
Gross charge-offs, Originated in fiscal year before current fiscal year 164 40  
Gross charge-offs, Originated two years before current fiscal year 161 44  
Gross charge-offs, Originated three years before current fiscal year 121 31  
Gross charge-offs, Originated four years before current fiscal year 72 65  
Gross charge-offs, Prior 733 220  
Gross charge-offs, Revolving Loans 192 119  
Commercial | Small Business Card Loans | Less than 620      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 699 530  
Commercial | Small Business Card Loans | Greater than or equal to 620 and less than 680      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 1,200 1,100  
Commercial | Small Business Card Loans | Greater than or equal to 680 and less than 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 3,000 2,700  
Commercial | Small Business Card Loans | Greater than or equal to 740      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases 5,800 5,500  
Commercial | Small Business Card Loans | United States      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases $ 10,600 $ 9,800