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LOANS - Defaults of Modified Consumer Loans (Details) - Consumer loans - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
In North America offices |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | $ 101 | $ 113 | $ 177 | $ 204
In North America offices | Interest rate reduction |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 92 | 105 | 150 | 178
In North America offices | Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 4 | 6 | 15 | 22
In North America offices | Payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
In North America offices | Combination: interest rate reduction and term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 5 | 2 | 12 | 4
In North America offices | Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
In North America offices | Combination: interest rate reduction, term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
In offices outside North America |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 3 | 2 | 10 | 7
In offices outside North America | Interest rate reduction |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 1 | 1 | 2 | 1
In offices outside North America | Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
In offices outside North America | Payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 1 | 0 | 3 | 3
In offices outside North America | Combination: interest rate reduction and term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 1 | 1 | 5 | 3
In offices outside North America | Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
In offices outside North America | Combination: interest rate reduction, term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Residential mortgages | In North America offices |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 8 | 7 | 25 | 25
Residential mortgages | In North America offices | Interest rate reduction |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Residential mortgages | In North America offices | Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 4 | 6 | 15 | 22
Residential mortgages | In North America offices | Payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Residential mortgages | In North America offices | Combination: interest rate reduction and term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 4 | 1 | 10 | 3
Residential mortgages | In North America offices | Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Residential mortgages | In North America offices | Combination: interest rate reduction, term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Residential mortgages | In offices outside North America |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 1 | 0 | 4 | 3
Residential mortgages | In offices outside North America | Interest rate reduction |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Residential mortgages | In offices outside North America | Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Residential mortgages | In offices outside North America | Payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 1 | 0 | 3 | 3
Residential mortgages | In offices outside North America | Combination: interest rate reduction and term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 1 | 0
Residential mortgages | In offices outside North America | Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Residential mortgages | In offices outside North America | Combination: interest rate reduction, term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Home equity loans | In North America offices |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Home equity loans | In North America offices | Interest rate reduction |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Home equity loans | In North America offices | Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Home equity loans | In North America offices | Payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Home equity loans | In North America offices | Combination: interest rate reduction and term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Home equity loans | In North America offices | Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Home equity loans | In North America offices | Combination: interest rate reduction, term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Total credit cards | In North America offices |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 92 | 105 | 150 | 178
Total credit cards | In North America offices | Interest rate reduction |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 92 | 105 | 150 | 178
Total credit cards | In North America offices | Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Total credit cards | In North America offices | Payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Total credit cards | In North America offices | Combination: interest rate reduction and term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Total credit cards | In North America offices | Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Total credit cards | In North America offices | Combination: interest rate reduction, term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Total credit cards | In offices outside North America |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 1 | 1 | 2 | 1
Total credit cards | In offices outside North America | Interest rate reduction |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 1 | 1 | 2 | 1
Total credit cards | In offices outside North America | Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Total credit cards | In offices outside North America | Payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Total credit cards | In offices outside North America | Combination: interest rate reduction and term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Total credit cards | In offices outside North America | Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Total credit cards | In offices outside North America | Combination: interest rate reduction, term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Personal, small business and other | In North America offices |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 1 | 1 | 2 | 1
Personal, small business and other | In North America offices | Interest rate reduction |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Personal, small business and other | In North America offices | Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Personal, small business and other | In North America offices | Payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Personal, small business and other | In North America offices | Combination: interest rate reduction and term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 1 | 1 | 2 | 1
Personal, small business and other | In North America offices | Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Personal, small business and other | In North America offices | Combination: interest rate reduction, term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Personal, small business and other | In offices outside North America |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 1 | 1 | 4 | 3
Personal, small business and other | In offices outside North America | Interest rate reduction |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Personal, small business and other | In offices outside North America | Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Personal, small business and other | In offices outside North America | Payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Personal, small business and other | In offices outside North America | Combination: interest rate reduction and term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 1 | 1 | 4 | 3
Personal, small business and other | In offices outside North America | Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | 0 | 0 | 0 | 0
Personal, small business and other | In offices outside North America | Combination: interest rate reduction, term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total loans defaulted within one year of modification | $ 0 | $ 0 | $ 0 | $ 0

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