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LOANS - Corporate Loan Modifications to Borrowers Experiencing Financial Difficulty (Details) - Corporate loans - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | $ 76 | $ 53 | $ 141 | $ 237
Commitments to lend | 105 | 924 | 105 | 924
Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | 76 | 53 | 141 | 237
Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | 0 | 0 | 0 | 0
Commercial and industrial |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | $ 76 | $ 4 | $ 141 | $ 107
Weighted average term extension | 12 months | 6 months | 10 months | 11 months
Commercial and industrial | Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | $ 76 | $ 4 | $ 141 | $ 107
Commercial and industrial | Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | 0 | 0 | 0 | 0
Financial institutions |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | 0 | 0 | 0 | 0
Financial institutions | Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | 0 | 0 | 0 | 0
Financial institutions | Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | 0 | 0 | 0 | 0
Mortgage and real estate |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | 0 | $ 49 | 0 | $ 130
Weighted average term extension |  | 6 months |  | 7 months
Mortgage and real estate | Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | 0 | $ 49 | 0 | $ 130
Mortgage and real estate | Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | 0 | 0 | 0 | 0
Other |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | 0 | 0 | 0 | 0
Other | Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | 0 | 0 | 0 | 0
Other | Combination: term extension and payment delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total modifications balance | $ 0 | $ 0 | $ 0 | $ 0

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- Definition Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
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