PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Healthcare Cost Trend Rate (Details) - Other post-employment benefits and other long-term employee benefits ("OPEB") |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Bottom of range | |||
| Disclosure of defined benefit plans [line items] | |||
| Healthcare cost trend rate assumed (in percent) | 2.00% | 2.10% | 2.20% |
| Top of range | |||
| Disclosure of defined benefit plans [line items] | |||
| Healthcare cost trend rate assumed (in percent) | 6.34% | 6.59% | 6.59% |
| Weighted average | |||
| Disclosure of defined benefit plans [line items] | |||
| Healthcare cost trend rate assumed (in percent) | 4.02% | 4.04% | 4.06% |