PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Key Management Personnel's Compensation (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Employee Benefits [Abstract] | |||
| Base salary and directors fees | $ 13 | $ 12 | $ 11 |
| Short-term performance-related bonus | 17 | 13 | 9 |
| Post-employment benefits | 2 | 1 | 1 |
| Fair value of long-term incentives | $ 16 | $ 14 | $ 9 |