ASSET RETIREMENT OBLIGATION: (Details) $ in Millions |
1 Months Ended | 3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Mar. 19, 2025 |
Apr. 30, 2024
USD ($)
|
Mar. 31, 2025
USD ($)
item
|
Mar. 31, 2024
USD ($)
|
Dec. 31, 2024
USD ($)
|
Jan. 31, 2025
USD ($)
|
|
| ASSET RETIREMENT OBLIGATION: | ||||||
| Percentage of guarantee for Lima office complex | 27.00% | |||||
| Percentage of security for letter of credit | 73.00% | |||||
| Total guarantees | $ 98.5 | |||||
| Period for updation of guarantee constitution table | 3 years | |||||
| Asset retirement obligation activity | ||||||
| Balance at the beginning of the year | $ 617.8 | $ 546.1 | $ 612.5 | $ 612.5 | ||
| Changes in estimates | (19.3) | (2.3) | ||||
| Accretion expense | 6.0 | 7.6 | ||||
| Balance at the end of the year | $ 532.9 | $ 617.8 | 546.1 | |||
| Peru | ||||||
| ASSET RETIREMENT OBLIGATION: | ||||||
| Number of units with future closure costs recognized as an asset retirement obligation | item | 3 | |||||
| Period after which successive reviews are required by the law (in years) | 5 years | |||||
| Change in asset retirement liability | $ (3.2) | |||||
| Mexico | ||||||
| Asset retirement obligation activity | ||||||
| Changes in estimates | $ (119.2) | |||||