LONG-TERM DEBT AND SHAREHOLDERS' EQUITY (Amounts Reclassified from AOCI) (Details) - USD ($) $ in Millions |
3 Months Ended | |
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Mar. 31, 2026 |
Mar. 31, 2025 |
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| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||
| Securities gains (losses), net | $ 3 | $ 6 |
| Interest and fees on loans; Interest on short- and long-term borrowings | 841 | 850 |
| Less: Income tax expense (benefit) | 61 | 69 |
| Net income | 233 | 170 |
| Net unrealized gains (losses) on investment securities | Amounts reclassified from AOCI | ||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||
| Securities gains (losses), net | (53) | (57) |
| Less: Income tax expense (benefit) | (13) | (14) |
| Net income | (40) | (43) |
| Net unrealized gains (losses) on derivatives and other | Amounts reclassified from AOCI | ||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||
| Interest and fees on loans; Interest on short- and long-term borrowings | (12) | (19) |
| Less: Income tax expense (benefit) | (3) | (5) |
| Net income | $ (9) | $ (14) |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of unrealized and realized gain (loss) on investment in debt and equity securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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