SUMMARY OF MATERIAL ACCOUNTING POLICIES - Revenue recognition (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2023 | |
| Bottom of range | |
| Disclosure of disaggregation of revenue from contracts with customers | |
| Revenue, performance obligation | 3 years |
| Scheduled service for customers contracts | 3 years |
| Top of range | |
| Disclosure of disaggregation of revenue from contracts with customers | |
| Revenue, performance obligation | 10 years |
| Scheduled service for customers contracts | 5 years |