INVESTMENT SECURITIES (Schedule of Investment Securities, Taxable and Nontaxable) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Net Investment Income [Line Items] | |||
| Available-for-sale | $ 288 | $ 325 | $ 322 |
| Held-to-maturity | 204 | 222 | 239 |
| Total investment securities | 492 | 547 | 561 |
| Taxable | |||
| Net Investment Income [Line Items] | |||
| Available-for-sale | 261 | 294 | 291 |
| Held-to-maturity | 199 | 218 | 236 |
| Total investment securities | 460 | 512 | 527 |
| Nontaxable | |||
| Net Investment Income [Line Items] | |||
| Available-for-sale | 27 | 31 | 31 |
| Held-to-maturity | 5 | 4 | 3 |
| Total investment securities | $ 32 | $ 35 | $ 34 |