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

Outstanding Loans and Leases and Allowance for Credit Losses - Past Due (Details)

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Outstanding Loans and Leases and Allowance for Credit Losses - Past Due (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 1,095,835 $ 1,053,732
Percentage of outstandings, total outstanding 100.00% 100.00%
Loans and leases, measured at fair value $ 4,249 $ 3,569
Asset Pledged as Collateral    
Financing Receivable, Past Due [Line Items]    
Loans and leases 26,800 33,700
Asset Pledged as Collateral | Federal Reserve Bank And Federal Home Loan Bank    
Financing Receivable, Past Due [Line Items]    
Loans and leases 305,200 246,000
Estimate of Fair Value Measurement    
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 4,249 $ 3,569
Percentage of outstandings, total outstanding 0.39% 0.34%
Direct/indirect consumer | Nonperforming Loans    
Financing Receivable, Past Due [Line Items]    
Nonperforming loans $ 54 $ 39
Consumer Portfolio Segment    
Financing Receivable, Past Due [Line Items]    
Loans and leases 464,996 459,965
Consumer Portfolio Segment | Carrying Value    
Financing Receivable, Past Due [Line Items]    
Loans and leases 464,775 459,722
Consumer Portfolio Segment | Estimate of Fair Value Measurement    
Financing Receivable, Past Due [Line Items]    
Loans and leases 221 243
Consumer Portfolio Segment | Residential Mortgage    
Financing Receivable, Past Due [Line Items]    
Loans and leases, measured at fair value 59 66
Consumer Portfolio Segment | Home equity lines of credit    
Financing Receivable, Past Due [Line Items]    
Loans and leases, measured at fair value 162 177
Consumer real estate | Nonperforming Loans    
Financing Receivable, Past Due [Line Items]    
Nonperforming loans 1,500 1,600
Consumer real estate | Residential Mortgage    
Financing Receivable, Past Due [Line Items]    
Loans and leases 228,199 228,403
Consumer real estate | Residential Mortgage | Carrying Value    
Financing Receivable, Past Due [Line Items]    
Loans and leases 228,199 228,403
Consumer real estate | Home equity    
Financing Receivable, Past Due [Line Items]    
Loans and leases 25,737 25,527
Consumer real estate | Home equity | Carrying Value    
Financing Receivable, Past Due [Line Items]    
Loans and leases 25,737 25,527
Credit card and other consumer | Credit card | Carrying Value    
Financing Receivable, Past Due [Line Items]    
Loans and leases 103,566 102,200
Credit card and other consumer | Direct/indirect consumer | Dealer Financial Services Loans    
Financing Receivable, Past Due [Line Items]    
Loans and leases 54,900 53,900
Credit card and other consumer | Direct/indirect consumer | Securities Based Lending Loans | United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 48,700 46,000
Credit card and other consumer | Direct/indirect consumer | Securities Based Lending Loans | Non United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 2,800 2,800
Credit card and other consumer | Direct/indirect consumer | Carrying Value    
Financing Receivable, Past Due [Line Items]    
Loans and leases 107,122 103,468
Credit card and other consumer | Other consumer | Carrying Value    
Financing Receivable, Past Due [Line Items]    
Loans and leases 151 124
Commercial    
Financing Receivable, Past Due [Line Items]    
Loans and leases 630,839 593,767
Commercial | United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 386,990 358,931
Loans and leases, measured at fair value 2,800 2,200
Commercial | Non United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 137,518 124,581
Loans and leases, measured at fair value 1,300 1,200
Commercial | Carrying Value    
Financing Receivable, Past Due [Line Items]    
Loans and leases 626,811 590,441
Commercial | Carrying Value | United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 386,990 358,931
Commercial | Carrying Value | Non United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 137,518 124,581
Commercial | Estimate of Fair Value Measurement    
Financing Receivable, Past Due [Line Items]    
Loans and leases 4,028 3,326
Commercial | Commercial real estate    
Financing Receivable, Past Due [Line Items]    
Loans and leases 65,730 72,878
Commercial | Commercial real estate | United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 59,600 66,800
Commercial | Commercial real estate | Non United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 6,100 6,100
Commercial | Commercial real estate | Carrying Value    
Financing Receivable, Past Due [Line Items]    
Loans and leases 65,730 72,878
Commercial | Commercial lease financing | Carrying Value    
Financing Receivable, Past Due [Line Items]    
Loans and leases 15,708 14,854
Commercial | U.S. small business commercial | United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 10,249 9,415
Commercial | U.S. small business commercial | Carrying Value    
Financing Receivable, Past Due [Line Items]    
Loans and leases 20,865 19,197
30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 4,114 $ 3,273
Percentage of outstandings 0.38% 0.31%
30 to 59 Days Past Due | Consumer Portfolio Segment    
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 2,277 $ 2,253
30 to 59 Days Past Due | Consumer real estate | US Government Agency Insured Loans    
Financing Receivable, Past Due [Line Items]    
Loans and leases 188 198
30 to 59 Days Past Due | Consumer real estate | Nonperforming Loans    
Financing Receivable, Past Due [Line Items]    
Loans and leases 174 150
30 to 59 Days Past Due | Consumer real estate | Residential Mortgage    
Financing Receivable, Past Due [Line Items]    
Loans and leases 1,222 1,177
30 to 59 Days Past Due | Consumer real estate | Home equity    
Financing Receivable, Past Due [Line Items]    
Loans and leases 80 90
30 to 59 Days Past Due | Credit card and other consumer | Credit card    
Financing Receivable, Past Due [Line Items]    
Loans and leases 685 680
30 to 59 Days Past Due | Credit card and other consumer | Direct/indirect consumer    
Financing Receivable, Past Due [Line Items]    
Loans and leases 290 306
30 to 59 Days Past Due | Credit card and other consumer | Other consumer    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 0
30 to 59 Days Past Due | Commercial    
Financing Receivable, Past Due [Line Items]    
Loans and leases 1,837 1,020
30 to 59 Days Past Due | Commercial | United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 910 477
30 to 59 Days Past Due | Commercial | Non United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 65 86
30 to 59 Days Past Due | Commercial | Commercial real estate    
Financing Receivable, Past Due [Line Items]    
Loans and leases 640 247
30 to 59 Days Past Due | Commercial | Commercial lease financing    
Financing Receivable, Past Due [Line Items]    
Loans and leases 32 44
30 to 59 Days Past Due | Commercial | U.S. small business commercial    
Financing Receivable, Past Due [Line Items]    
Loans and leases 190 166
60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 1,462 $ 1,301
Percentage of outstandings 0.13% 0.12%
60 to 89 Days Past Due | Consumer Portfolio Segment    
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 993 $ 954
60 to 89 Days Past Due | Consumer real estate | US Government Agency Insured Loans    
Financing Receivable, Past Due [Line Items]    
Loans and leases 71 77
60 to 89 Days Past Due | Consumer real estate | Nonperforming Loans    
Financing Receivable, Past Due [Line Items]    
Loans and leases 107 102
60 to 89 Days Past Due | Consumer real estate | Residential Mortgage    
Financing Receivable, Past Due [Line Items]    
Loans and leases 288 302
60 to 89 Days Past Due | Consumer real estate | Home equity    
Financing Receivable, Past Due [Line Items]    
Loans and leases 40 38
60 to 89 Days Past Due | Credit card and other consumer | Credit card    
Financing Receivable, Past Due [Line Items]    
Loans and leases 552 515
60 to 89 Days Past Due | Credit card and other consumer | Direct/indirect consumer    
Financing Receivable, Past Due [Line Items]    
Loans and leases 113 99
60 to 89 Days Past Due | Credit card and other consumer | Other consumer    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 0
60 to 89 Days Past Due | Commercial    
Financing Receivable, Past Due [Line Items]    
Loans and leases 469 347
60 to 89 Days Past Due | Commercial | United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 228 96
60 to 89 Days Past Due | Commercial | Non United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 17 21
60 to 89 Days Past Due | Commercial | Commercial real estate    
Financing Receivable, Past Due [Line Items]    
Loans and leases 121 133
60 to 89 Days Past Due | Commercial | Commercial lease financing    
Financing Receivable, Past Due [Line Items]    
Loans and leases 9 8
60 to 89 Days Past Due | Commercial | U.S. small business commercial    
Financing Receivable, Past Due [Line Items]    
Loans and leases 94 89
90+ Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 3,979 $ 3,307
Percentage of outstandings 0.36% 0.31%
90+ Days Past Due | Consumer Portfolio Segment    
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 2,422 $ 2,305
90+ Days Past Due | Consumer real estate | US Government Agency Insured Loans    
Financing Receivable, Past Due [Line Items]    
Loans and leases 229 252
90+ Days Past Due | Consumer real estate | Nonperforming Loans    
Financing Receivable, Past Due [Line Items]    
Loans and leases 686 738
90+ Days Past Due | Consumer real estate | Residential Mortgage    
Financing Receivable, Past Due [Line Items]    
Loans and leases 788 829
90+ Days Past Due | Consumer real estate | Home equity    
Financing Receivable, Past Due [Line Items]    
Loans and leases 127 161
90+ Days Past Due | Credit card and other consumer | Credit card    
Financing Receivable, Past Due [Line Items]    
Loans and leases 1,401 1,224
90+ Days Past Due | Credit card and other consumer | Direct/indirect consumer    
Financing Receivable, Past Due [Line Items]    
Loans and leases 106 91
90+ Days Past Due | Credit card and other consumer | Other consumer    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 0
90+ Days Past Due | Commercial    
Financing Receivable, Past Due [Line Items]    
Loans and leases 1,557 1,002
90+ Days Past Due | Commercial | United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 345 225
90+ Days Past Due | Commercial | Non United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 4 64
90+ Days Past Due | Commercial | Commercial real estate    
Financing Receivable, Past Due [Line Items]    
Loans and leases 990 505
90+ Days Past Due | Commercial | Commercial lease financing    
Financing Receivable, Past Due [Line Items]    
Loans and leases 19 24
90+ Days Past Due | Commercial | U.S. small business commercial    
Financing Receivable, Past Due [Line Items]    
Loans and leases 199 184
Total Past Due 30 Days or More    
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 9,555 $ 7,881
Percentage of outstandings 0.87% 0.75%
Total Past Due 30 Days or More | Consumer Portfolio Segment    
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 5,692 $ 5,512
Total Past Due 30 Days or More | Consumer real estate | Residential Mortgage    
Financing Receivable, Past Due [Line Items]    
Loans and leases 2,298 2,308
Total Past Due 30 Days or More | Consumer real estate | Home equity    
Financing Receivable, Past Due [Line Items]    
Loans and leases 247 289
Total Past Due 30 Days or More | Credit card and other consumer | Credit card    
Financing Receivable, Past Due [Line Items]    
Loans and leases 2,638 2,419
Total Past Due 30 Days or More | Credit card and other consumer | Direct/indirect consumer    
Financing Receivable, Past Due [Line Items]    
Loans and leases 509 496
Total Past Due 30 Days or More | Credit card and other consumer | Other consumer    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 0
Total Past Due 30 Days or More | Commercial    
Financing Receivable, Past Due [Line Items]    
Loans and leases 3,863 2,369
Total Past Due 30 Days or More | Commercial | United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 1,483 798
Total Past Due 30 Days or More | Commercial | Non United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 86 171
Total Past Due 30 Days or More | Commercial | Commercial real estate    
Financing Receivable, Past Due [Line Items]    
Loans and leases 1,751 885
Total Past Due 30 Days or More | Commercial | Commercial lease financing    
Financing Receivable, Past Due [Line Items]    
Loans and leases 60 76
Total Past Due 30 Days or More | Commercial | U.S. small business commercial    
Financing Receivable, Past Due [Line Items]    
Loans and leases 483 439
Total Current or Less Than 30 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 1,082,031 $ 1,042,282
Percentage of outstandings, total outstanding 98.74% 98.91%
Total Current or Less Than 30 Days Past Due | Consumer Portfolio Segment    
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 459,083 $ 454,210
Total Current or Less Than 30 Days Past Due | Consumer real estate | Residential Mortgage    
Financing Receivable, Past Due [Line Items]    
Loans and leases 225,901 226,095
Total Current or Less Than 30 Days Past Due | Consumer real estate | Home equity    
Financing Receivable, Past Due [Line Items]    
Loans and leases 25,490 25,238
Total Current or Less Than 30 Days Past Due | Credit card and other consumer | Credit card    
Financing Receivable, Past Due [Line Items]    
Loans and leases 100,928 99,781
Total Current or Less Than 30 Days Past Due | Credit card and other consumer | Direct/indirect consumer    
Financing Receivable, Past Due [Line Items]    
Loans and leases 106,613 102,972
Total Current or Less Than 30 Days Past Due | Credit card and other consumer | Other consumer    
Financing Receivable, Past Due [Line Items]    
Loans and leases 151 124
Total Current or Less Than 30 Days Past Due | Commercial    
Financing Receivable, Past Due [Line Items]    
Loans and leases 622,948 588,072
Total Current or Less Than 30 Days Past Due | Commercial | United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 385,507 358,133
Total Current or Less Than 30 Days Past Due | Commercial | Non United States    
Financing Receivable, Past Due [Line Items]    
Loans and leases 137,432 124,410
Total Current or Less Than 30 Days Past Due | Commercial | Commercial real estate    
Financing Receivable, Past Due [Line Items]    
Loans and leases 63,979 71,993
Total Current or Less Than 30 Days Past Due | Commercial | Commercial lease financing    
Financing Receivable, Past Due [Line Items]    
Loans and leases 15,648 14,778
Total Current or Less Than 30 Days Past Due | Commercial | U.S. small business commercial    
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 20,382 $ 18,758