RETIREMENT BENEFIT PLANS - Summary of Principal Actuarial Assumptions Used for Defined Benefit Schemes (Details) |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Disclosure of net defined benefit liability (asset) [abstract] | ||
| - Discount rate for scheme liabilities | 5.90% | 5.60% |
| - General price inflation | 3.00% | 2.90% |
| - General salary increase | 1.00% | 1.00% |
| - Expected rate of pension increase | 2.80% | 2.80% |
| Longevity at 60 for current pensioners, on the valuation date: | ||
| - Males | 27 years 3 months 18 days | 27 years 2 months 12 days |
| - Females | 29 years 2 months 12 days | 29 years 1 month 6 days |
| Longevity at 60 for future pensioners currently aged 40, on the valuation date: | ||
| - Males | 28 years 9 months 18 days | 28 years 8 months 12 days |
| - Females | 30 years 8 months 12 days | 30 years 7 months 6 days |