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ASSET RETIREMENT OBLIGATION: (Details) $ in Millions |  | 1 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Mar. 19, 2025 | Apr. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) item | Sep. 30, 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 |  |  |  |
Amount of decrease the asset retirement asset |  |  | $ 48.8 |  |
Amount of decrease in asset retirement obligations to cost of goods sold |  |  | 57.9 |  |
Asset retirement obligation activity |  |  |  |  |
Balance at the beginning of the year |  |  | 546.1 | $ 612.6 |
Changes in estimates |  |  | (106.7) | (12.3) |
Accretion expense |  |  | 18.2 | 21.3 |
Balance at the end of the year |  |  | $ 457.7 | $ 621.6 |
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 |  |  | $ (106.7) |  |

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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481999/410-20-25-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 + Details
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