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LOANS - Performance of Modified Consumer Loans (Details) - Consumer loans - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
In North America offices |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | $ 1,906 | $ 1,559
Gross credit losses | 285 | 293
In North America offices | Current |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 1,314 | 1,144
In North America offices | 30–89 days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 228 | 232
In North America offices | 90+ days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 364 | 183
In offices outside North America |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 97 | 84
Gross credit losses | 3 | 1
In offices outside North America | Current |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 85 | 74
In offices outside North America | 30–89 days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 10 | 7
In offices outside North America | 90+ days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 2 | 3
Residential mortgages | In North America offices |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 378 | 99
Gross credit losses | 0 | 0
Residential mortgages | In North America offices | Current |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 97 | 40
Residential mortgages | In North America offices | 30–89 days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 24 | 19
Residential mortgages | In North America offices | 90+ days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 257 | 40
Residential mortgages | In offices outside North America |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 38 | 37
Gross credit losses | 1 | 0
Residential mortgages | In offices outside North America | Current |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 34 | 34
Residential mortgages | In offices outside North America | 30–89 days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 3 | 2
Residential mortgages | In offices outside North America | 90+ days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 1 | 1
Home equity loans | In North America offices |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 4 | 3
Gross credit losses | 0 | 0
Home equity loans | In North America offices | Current |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 0 | 1
Home equity loans | In North America offices | 30–89 days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 1 | 0
Home equity loans | In North America offices | 90+ days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 3 | 2
Total credit cards | In North America offices |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 1,492 | 1,432
Gross credit losses | 283 | 291
Total credit cards | In North America offices | Current |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 1,189 | 1,081
Total credit cards | In North America offices | 30–89 days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 200 | 211
Total credit cards | In North America offices | 90+ days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 103 | 140
Total credit cards | In offices outside North America |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 29 | 17
Gross credit losses | 1 | 0
Total credit cards | In offices outside North America | Current |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 25 | 16
Total credit cards | In offices outside North America | 30–89 days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 3 | 1
Total credit cards | In offices outside North America | 90+ days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 1 | 0
Personal, small business and other | In North America offices |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 32 | 25
Gross credit losses | 2 | 2
Personal, small business and other | In North America offices | Current |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 28 | 22
Personal, small business and other | In North America offices | 30–89 days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 3 | 2
Personal, small business and other | In North America offices | 90+ days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 1 | 1
Personal, small business and other | In offices outside North America |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 30 | 30
Gross credit losses | 1 | 1
Personal, small business and other | In offices outside North America | Current |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 26 | 24
Personal, small business and other | In offices outside North America | 30–89 days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | 4 | 4
Personal, small business and other | In offices outside North America | 90+ days past due |  |
Financing Receivable, Modified [Line Items] |  |
Total modified loans balance | $ 0 | $ 2

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