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LOANS - Consumer Loans, Delinquencies and Non-Accrual Details (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | $ 733,905 |  | $ 733,905 |  | $ 694,488
Held at fair value | 7,896 |  | 7,896 |  | 8,040
Reversal of accrued interest | 400 | $ 400 | 1,400 | $ 1,200 |
Unallocated portfolio layer cumulative basis adjustments |  |  |  |  | (72)
Consumer loans |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 398,628 |  | 398,628 |  | 393,102
Non-accrual loans for which there is no ACLL | 161 |  | 161 |  | 146
Non-accrual loans for which there is an ACLL | 1,446 |  | 1,446 |  | 1,164
Total non-accrual | 1,607 |  | 1,607 |  | 1,310
90 days past due and accruing | 2,578 |  | 2,578 |  | 2,907
Total excluding portfolio-layer hedges cumulative basis adjustments | 398,036 |  | 398,036 |  | 393,326
Held at fair value | 26 |  | 26 |  | 281
Unearned income | 939 |  | 939 |  | 889
Accrued interest receivable | 1,000 |  | 1,000 |  | 1,000
Unallocated portfolio layer cumulative basis adjustments | 592 |  | 592 |  | (224)
Consumer loans | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total excluding portfolio-layer hedges cumulative basis adjustments | 391,214 |  | 391,214 |  | 386,444
Consumer loans | 30–89 days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total excluding portfolio-layer hedges cumulative basis adjustments | 3,222 |  | 3,222 |  | 3,175
Consumer loans | 90+ days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total excluding portfolio-layer hedges cumulative basis adjustments | 3,395 |  | 3,395 |  | 3,472
Consumer loans | Past Due | Government-guaranteed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total excluding portfolio-layer hedges cumulative basis adjustments | 205 |  | 205 |  | 235
Consumer loans | In North America offices |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 320,595 |  | 320,595 |  | 321,948
Non-accrual loans for which there is no ACLL | 161 |  | 161 |  | 146
Non-accrual loans for which there is an ACLL | 845 |  | 845 |  | 677
Total non-accrual | 1,006 |  | 1,006 |  | 823
90 days past due and accruing | 2,487 |  | 2,487 |  | 2,835
Consumer loans | In North America offices | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 314,575 |  | 314,575 |  | 315,704
Consumer loans | In North America offices | 30–89 days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 2,819 |  | 2,819 |  | 2,847
Consumer loans | In North America offices | 90+ days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 2,996 |  | 2,996 |  | 3,162
Consumer loans | In North America offices | 90+ days past due | Banking |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 25,200 |  | 25,200 |  | 25,900
Consumer loans | In North America offices | Past Due | Government-guaranteed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 205 |  | 205 |  | 235
Consumer loans | In offices outside North America |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 77,441 |  | 77,441 |  | 71,378
Non-accrual loans for which there is no ACLL | 0 |  | 0 |  | 0
Non-accrual loans for which there is an ACLL | 601 |  | 601 |  | 487
Total non-accrual | 601 |  | 601 |  | 487
90 days past due and accruing | 91 |  | 91 |  | 72
Consumer loans | In offices outside North America | Classifiably managed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 21,562 |  | 21,562 |  | 17,553
Consumer loans | In offices outside North America | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 76,639 |  | 76,639 |  | 70,740
Consumer loans | In offices outside North America | 30–89 days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 403 |  | 403 |  | 328
Consumer loans | In offices outside North America | 90+ days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 399 |  | 399 |  | 310
Consumer loans | In offices outside North America | 90+ days past due | Banking |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 21,600 |  | 21,600 |  | 17,600
Consumer loans | In offices outside North America | Past Due | Government-guaranteed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 0 |  | 0 |  | 0
Consumer loans | Residential mortgages |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Held at fair value | 26 |  | 26 |  | 281
Consumer loans | Residential mortgages | In North America offices |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 117,799 |  | 117,799 |  | 114,593
Non-accrual loans for which there is no ACLL | 134 |  | 134 |  | 114
Non-accrual loans for which there is an ACLL | 589 |  | 589 |  | 409
Total non-accrual | 723 |  | 723 |  | 523
90 days past due and accruing | 110 |  | 110 |  | 128
Mortgage loans in process of foreclosure | 100 |  | 100 |  | 200
Consumer loans | Residential mortgages | In North America offices | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 116,633 |  | 116,633 |  | 113,613
Consumer loans | Residential mortgages | In North America offices | 30–89 days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 413 |  | 413 |  | 397
Consumer loans | Residential mortgages | In North America offices | 30–89 days past due | Government-guaranteed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 100 |  | 100 |  |
Consumer loans | Residential mortgages | In North America offices | 90+ days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 548 |  | 548 |  | 349
Consumer loans | Residential mortgages | In North America offices | 90+ days past due | Government-guaranteed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income |  |  |  |  | 100
Consumer loans | Residential mortgages | In North America offices | Past Due | Government-guaranteed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 205 |  | 205 |  | 234
Consumer loans | Residential mortgages | In offices outside North America |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 24,078 |  | 24,078 |  | 24,456
Non-accrual loans for which there is no ACLL | 0 |  | 0 |  | 0
Non-accrual loans for which there is an ACLL | 177 |  | 177 |  | 155
Total non-accrual | 177 |  | 177 |  | 155
90 days past due and accruing | 0 |  | 0 |  | 0
Mortgage loans in process of foreclosure | 100 |  | 100 |  | 100
Consumer loans | Residential mortgages | In offices outside North America | Classifiably managed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 0 |  | 0 |  | 0
Consumer loans | Residential mortgages | In offices outside North America | Global Wealth Management Business |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 18,700 |  | 18,700 |  | 19,100
Consumer loans | Residential mortgages | In offices outside North America | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 23,959 |  | 23,959 |  | 24,358
Consumer loans | Residential mortgages | In offices outside North America | 30–89 days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 46 |  | 46 |  | 38
Consumer loans | Residential mortgages | In offices outside North America | 90+ days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 73 |  | 73 |  | 60
Consumer loans | Residential mortgages | In offices outside North America | Past Due | Government-guaranteed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 0 |  | 0 |  | 0
Consumer loans | Home equity loans | In North America offices |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 2,916 |  | 2,916 |  | 3,141
Non-accrual loans for which there is no ACLL | 22 |  | 22 |  | 25
Non-accrual loans for which there is an ACLL | 89 |  | 89 |  | 114
Total non-accrual | 111 |  | 111 |  | 139
90 days past due and accruing | 0 |  | 0 |  | 0
Home equity loans in process of foreclosure | 100 |  | 100 |  | 100
Consumer loans | Home equity loans | In North America offices | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 2,848 |  | 2,848 |  | 3,060
Consumer loans | Home equity loans | In North America offices | 30–89 days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 28 |  | 28 |  | 23
Consumer loans | Home equity loans | In North America offices | 90+ days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 40 |  | 40 |  | 58
Consumer loans | Home equity loans | In North America offices | Past Due | Government-guaranteed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 0 |  | 0 |  | 0
Consumer loans | Credit cards | In North America offices |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 167,446 |  | 167,446 |  | 171,059
Non-accrual loans for which there is no ACLL | 0 |  | 0 |  | 0
Non-accrual loans for which there is an ACLL | 0 |  | 0 |  | 0
Total non-accrual | 0 |  | 0 |  | 0
90 days past due and accruing | 2,377 |  | 2,377 |  | 2,705
Consumer loans | Credit cards | In North America offices | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 162,786 |  | 162,786 |  | 166,021
Consumer loans | Credit cards | In North America offices | 30–89 days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 2,283 |  | 2,283 |  | 2,333
Consumer loans | Credit cards | In North America offices | 90+ days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 2,377 |  | 2,377 |  | 2,705
Consumer loans | Credit cards | In North America offices | Past Due | Government-guaranteed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 0 |  | 0 |  | 0
Consumer loans | Credit cards | In offices outside North America |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 13,754 |  | 13,754 |  | 12,927
Non-accrual loans for which there is no ACLL | 0 |  | 0 |  | 0
Non-accrual loans for which there is an ACLL | 283 |  | 283 |  | 211
Total non-accrual | 283 |  | 283 |  | 211
90 days past due and accruing | 91 |  | 91 |  | 72
Consumer loans | Credit cards | In offices outside North America | Classifiably managed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 0 |  | 0 |  | 0
Consumer loans | Credit cards | In offices outside North America | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 13,230 |  | 13,230 |  | 12,523
Consumer loans | Credit cards | In offices outside North America | 30–89 days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 238 |  | 238 |  | 190
Consumer loans | Credit cards | In offices outside North America | 90+ days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 286 |  | 286 |  | 214
Consumer loans | Credit cards | In offices outside North America | Past Due | Government-guaranteed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 0 |  | 0 |  | 0
Consumer loans | Personal, small business and other | In North America offices |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 32,434 |  | 32,434 |  | 33,155
Non-accrual loans for which there is no ACLL | 5 |  | 5 |  | 7
Non-accrual loans for which there is an ACLL | 167 |  | 167 |  | 154
Total non-accrual | 172 |  | 172 |  | 161
90 days past due and accruing | 0 |  | 0 |  | 2
Consumer loans | Personal, small business and other | In North America offices | Global Wealth Management Business |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | $ 27,400 |  | $ 27,400 |  | $ 28,100
Consumer loans | Personal, small business and other | In North America offices | Global Wealth Management Business | Internal Investment Grade |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Percentage of loans rated investment grade | 80.00% |  | 80.00% |  | 83.00%
Consumer loans | Personal, small business and other | In North America offices | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | $ 32,308 |  | $ 32,308 |  | $ 33,010
Consumer loans | Personal, small business and other | In North America offices | 30–89 days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 95 |  | 95 |  | 94
Consumer loans | Personal, small business and other | In North America offices | 90+ days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 31 |  | 31 |  | 50
Consumer loans | Personal, small business and other | In North America offices | Past Due | Government-guaranteed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 0 |  | 0 |  | 1
Consumer loans | Personal, small business and other | In offices outside North America |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 39,609 |  | 39,609 |  | 33,995
Non-accrual loans for which there is no ACLL | 0 |  | 0 |  | 0
Non-accrual loans for which there is an ACLL | 141 |  | 141 |  | 121
Total non-accrual | 141 |  | 141 |  | 121
90 days past due and accruing | 0 |  | 0 |  | 0
Consumer loans | Personal, small business and other | In offices outside North America | Classifiably managed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 21,562 |  | 21,562 |  | $ 17,553
Consumer loans | Personal, small business and other | In offices outside North America | Internal Investment Grade |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Percentage of loans rated investment grade |  |  |  |  | 83.00%
Consumer loans | Personal, small business and other | In offices outside North America | Global Wealth Management Business |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | $ 30,000 |  | $ 30,000 |  | $ 25,400
Consumer loans | Personal, small business and other | In offices outside North America | Global Wealth Management Business | Classifiably managed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income |  |  |  |  | $ 17,600
Consumer loans | Personal, small business and other | In offices outside North America | Global Wealth Management Business | Internal Investment Grade |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Percentage of loans rated investment grade | 54.00% |  | 54.00% |  | 56.00%
Consumer loans | Personal, small business and other | In offices outside North America | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | $ 39,450 |  | $ 39,450 |  | $ 33,859
Consumer loans | Personal, small business and other | In offices outside North America | 30–89 days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 119 |  | 119 |  | 100
Consumer loans | Personal, small business and other | In offices outside North America | 90+ days past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | 40 |  | 40 |  | 36
Consumer loans | Personal, small business and other | In offices outside North America | Past Due | Government-guaranteed |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loans, net of unearned income | $ 0 |  | $ 0 |  | $ 0

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