Quarterly report pursuant to Section 13 or 15(d)

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
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases $ 1,075,800   $ 1,075,800   $ 1,053,732
Total gross charge-offs 1,800 $ 1,187 5,317 $ 3,367  
Estimate of Fair Value Measurement          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 4,172   4,172   3,569
Small Business Card Loans | United States          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total gross charge-offs     361   317
Commercial          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 615,549   615,549   593,767
Total gross charge-offs 529 $ 178 1,535 $ 544  
Commercial | Estimate of Fair Value Measurement          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 3,943   3,943   3,326
Commercial | United States          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 379,563   379,563   358,931
Originated in current fiscal year 32,200   32,200   42,120
Originated in fiscal year before current fiscal year 37,100   37,100   44,606
Originated two years before current fiscal year 37,241   37,241   28,446
Originated three years before current fiscal year 23,204   23,204   13,858
Originated four years before current fiscal year 11,697   11,697   12,309
Prior 37,946   37,946   31,265
Revolving Loans 200,175   200,175   186,327
Total gross charge-offs     327   191
Gross charge-offs, Originated in current fiscal year     2   5
Gross charge-offs, Originated in fiscal year before current fiscal year     111   38
Gross charge-offs, Originated two years before current fiscal year     64   29
Gross charge-offs, Originated three years before current fiscal year     14   4
Gross charge-offs, Originated four years before current fiscal year     4   2
Gross charge-offs, Prior     16   27
Gross charge-offs, Revolving Loans     116   86
Commercial | United States | Pass rated          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 366,116   366,116   347,563
Originated in current fiscal year 32,114   32,114   41,842
Originated in fiscal year before current fiscal year 36,286   36,286   43,290
Originated two years before current fiscal year 36,234   36,234   27,738
Originated three years before current fiscal year 22,318   22,318   13,495
Originated four years before current fiscal year 11,309   11,309   11,772
Prior 35,902   35,902   29,923
Revolving Loans 191,953   191,953   179,503
Commercial | United States | Reservable criticized          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 13,447   13,447   11,368
Originated in current fiscal year 86   86   278
Originated in fiscal year before current fiscal year 814   814   1,316
Originated two years before current fiscal year 1,007   1,007   708
Originated three years before current fiscal year 886   886   363
Originated four years before current fiscal year 388   388   537
Prior 2,044   2,044   1,342
Revolving Loans 8,222   8,222   6,824
Commercial | Non United States          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 127,738   127,738   124,581
Originated in current fiscal year 13,330   13,330   17,103
Originated in fiscal year before current fiscal year 17,057   17,057   15,994
Originated two years before current fiscal year 13,428   13,428   15,550
Originated three years before current fiscal year 13,005   13,005   2,495
Originated four years before current fiscal year 1,462   1,462   3,108
Prior 7,734   7,734   5,559
Revolving Loans 61,722   61,722   64,772
Total gross charge-offs     61   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     20   8
Gross charge-offs, Originated three years before current fiscal year     0   7
Gross charge-offs, Originated four years before current fiscal year     0   1
Gross charge-offs, Prior     0   0
Gross charge-offs, Revolving Loans     0   21
Commercial | Non United States | Pass rated          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 125,663   125,663   122,931
Originated in current fiscal year 13,329   13,329   17,053
Originated in fiscal year before current fiscal year 16,902   16,902   15,810
Originated two years before current fiscal year 13,303   13,303   15,256
Originated three years before current fiscal year 12,712   12,712   2,405
Originated four years before current fiscal year 1,450   1,450   2,950
Prior 7,643   7,643   5,485
Revolving Loans 60,324   60,324   63,972
Commercial | Non United States | Reservable criticized          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 2,075   2,075   1,650
Originated in current fiscal year 1   1   50
Originated in fiscal year before current fiscal year 155   155   184
Originated two years before current fiscal year 125   125   294
Originated three years before current fiscal year 293   293   90
Originated four years before current fiscal year 12   12   158
Prior 91   91   74
Revolving Loans 1,398   1,398   800
Commercial | Commercial real estate          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 68,420   68,420   72,878
Originated in current fiscal year 4,259   4,259   5,011
Originated in fiscal year before current fiscal year 5,071   5,071   16,896
Originated two years before current fiscal year 15,074   15,074   13,538
Originated three years before current fiscal year 12,426   12,426   4,808
Originated four years before current fiscal year 3,698   3,698   9,418
Prior 17,557   17,557   12,921
Revolving Loans 10,335   10,335   10,286
Total gross charge-offs     762   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     531   189
Gross charge-offs, Revolving Loans     29   0
Commercial | Commercial real estate | Pass rated          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 58,554   58,554   64,150
Originated in current fiscal year 4,232   4,232   4,877
Originated in fiscal year before current fiscal year 4,891   4,891   16,147
Originated two years before current fiscal year 12,653   12,653   11,810
Originated three years before current fiscal year 10,197   10,197   4,026
Originated four years before current fiscal year 3,054   3,054   7,286
Prior 13,604   13,604   10,127
Revolving Loans 9,923   9,923   9,877
Commercial | Commercial real estate | Reservable criticized          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 9,866   9,866   8,728
Originated in current fiscal year 27   27   134
Originated in fiscal year before current fiscal year 180   180   749
Originated two years before current fiscal year 2,421   2,421   1,728
Originated three years before current fiscal year 2,229   2,229   782
Originated four years before current fiscal year 644   644   2,132
Prior 3,953   3,953   2,794
Revolving Loans 412   412   409
Commercial | Commercial real estate | United States          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 61,800   61,800   66,800
Commercial | Commercial real estate | Non United States          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 6,600   6,600   6,100
Commercial | Commercial Lease Financing          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 14,992   14,992   14,854
Originated in current fiscal year 2,603   2,603   4,197
Originated in fiscal year before current fiscal year 3,876   3,876   3,099
Originated two years before current fiscal year 2,651   2,651   2,419
Originated three years before current fiscal year 2,110   2,110   1,365
Originated four years before current fiscal year 989   989   1,206
Prior 2,763   2,763   2,568
Revolving Loans 0   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 14,748   14,748   14,688
Originated in current fiscal year 2,596   2,596   4,188
Originated in fiscal year before current fiscal year 3,823   3,823   3,077
Originated two years before current fiscal year 2,590   2,590   2,373
Originated three years before current fiscal year 2,072   2,072   1,349
Originated four years before current fiscal year 966   966   1,174
Prior 2,701   2,701   2,527
Revolving Loans 0   0   0
Commercial | Commercial Lease Financing | Reservable criticized          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 244   244   166
Originated in current fiscal year 7   7   9
Originated in fiscal year before current fiscal year 53   53   22
Originated two years before current fiscal year 61   61   46
Originated three years before current fiscal year 38   38   16
Originated four years before current fiscal year 23   23   32
Prior 62   62   41
Revolving Loans 0   0   0
Commercial | U.S. small business commercial | United States          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 9,991   9,991   9,415
Originated in current fiscal year 1,383   1,383   1,892
Originated in fiscal year before current fiscal year 1,977   1,977   1,894
Originated two years before current fiscal year 1,797   1,797   1,645
Originated three years before current fiscal year 1,474   1,474   876
Originated four years before current fiscal year 690   690   784
Prior 2,228   2,228   1,893
Revolving Loans 442   442   431
Total gross charge-offs     22   43
Gross charge-offs, Originated in current fiscal year     0   1
Gross charge-offs, Originated in fiscal year before current fiscal year     0   2
Gross charge-offs, Originated two years before current fiscal year     1   2
Gross charge-offs, Originated three years before current fiscal year     0   19
Gross charge-offs, Originated four years before current fiscal year     5   3
Gross charge-offs, Prior     4   4
Gross charge-offs, Revolving Loans     12   12
Commercial | U.S. small business commercial | United States | Pass rated          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 9,562   9,562   9,031
Originated in current fiscal year 1,379   1,379   1,886
Originated in fiscal year before current fiscal year 1,920   1,920   1,830
Originated two years before current fiscal year 1,698   1,698   1,550
Originated three years before current fiscal year 1,354   1,354   836
Originated four years before current fiscal year 665   665   721
Prior 2,108   2,108   1,780
Revolving Loans 438   438   428
Commercial | U.S. small business commercial | United States | Reservable criticized          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 429   429   384
Originated in current fiscal year 4   4   6
Originated in fiscal year before current fiscal year 57   57   64
Originated two years before current fiscal year 99   99   95
Originated three years before current fiscal year 120   120   40
Originated four years before current fiscal year 25   25   63
Prior 120   120   113
Revolving Loans 4   4   3
Commercial | Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 600,704   600,704   580,659
Originated in current fiscal year 53,775   53,775   70,323
Originated in fiscal year before current fiscal year 65,081   65,081   82,489
Originated two years before current fiscal year 70,191   70,191   61,598
Originated three years before current fiscal year 52,219   52,219   23,402
Originated four years before current fiscal year 18,536   18,536   26,825
Prior 68,228   68,228   54,206
Revolving Loans 272,674   272,674   261,816
Total gross charge-offs     1,174   527
Gross charge-offs, Originated in current fiscal year     2   8
Gross charge-offs, Originated in fiscal year before current fiscal year     152   40
Gross charge-offs, Originated two years before current fiscal year     142   44
Gross charge-offs, Originated three years before current fiscal year     99   31
Gross charge-offs, Originated four years before current fiscal year     71   65
Gross charge-offs, Prior     551   220
Gross charge-offs, Revolving Loans     157   119
Commercial | Small Business Card Loans | Less than 620          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases 667   667   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   1,200   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   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 6,100   6,100   5,500
Commercial | Small Business Card Loans | United States          
Financing Receivable, Credit Quality Indicator [Line Items]          
Loans and leases $ 10,900   $ 10,900   $ 9,800