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COMMITMENTS AND CONTINGENCIES: - Environmental Costs (Details) $ in Millions, MXN in Billions |  |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | 22 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 26, 2016 lawsuit | Mar. 02, 2015 USD ($) | Sep. 15, 2014 MXN item | Sep. 15, 2014 USD ($) item | Aug. 06, 2014 km m³ | Aug. 31, 2014 | Mar. 31, 2014 | Sep. 30, 2016 USD ($) lawsuit | Jun. 30, 2015 lawsuit item | Sep. 30, 2016 MXN item | Sep. 30, 2016 USD ($) item | Sep. 30, 2015 USD ($) | Dec. 31, 2015 lawsuit item | Dec. 31, 2011 category person | Jun. 30, 2016 MXN | Mar. 31, 2016 lawsuit
Environmental costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental capital investment | $ |  |  |  |  |  |  |  |  |  |  | $ 159.9 | $ 76.2 |  |  |  |
Amount of administrative fines and sanctions | $ |  | $ 1.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of collective action lawsuits |  |  |  |  |  |  |  |  | 6 |  |  |  |  |  |  |
Number of subsidiaries against which lawsuits were filed | item |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Number of lawsuits dismissed |  |  |  |  |  |  |  |  | 4 |  |  |  |  |  |  |
Number of constitutional action lawsuits |  |  |  |  |  |  |  |  |  |  |  |  | 4 |  |  |
Number of subsidiaries to which environmental impact authorizations were granted | item |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |
Buenavista del Cobre, S.A. de C.V |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volume of copper sulfate solution (in cubic meters) | m³ |  |  |  |  | 40,000 |  |  |  |  |  |  |  |  |  |  |
Distance of pond under construction from mine (in kilometers) | km |  |  |  |  | 10 |  |  |  |  |  |  |  |  |  |  |
Number of zones | item |  |  | 5 | 5 |  |  |  |  |  |  |  |  |  |  |  |
Amount contributed to the Mexican Federal Government (in peso) | MXN |  |  |  |  |  |  |  |  |  |  |  |  |  |  | MXN 1 |
Estimated total damages | $ |  |  |  |  |  |  |  | $ 136.4 |  |  | 136.4 |  |  |  |  |
Amount already paid | $ |  |  |  |  |  |  |  | $ 42.3 |  |  | 42.3 |  |  |  |  |
Amount deposited in the trust |  |  |  |  |  |  |  |  |  | MXN 1 | 74.9 |  |  |  |  |
Number of civil actions seeking damages |  |  |  |  |  |  |  |  |  |  |  |  | 8 |  |  | 1
Buenavista del Cobre, S.A. de C.V | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount committed to the Mexican Federal Government to establish a trust |  |  | MXN 2 | $ 150.0 |  |  |  |  |  |  |  |  |  |  |  |
Buenavista del Cobre, S.A. de C.V | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of workers to clean the river |  |  |  |  |  | 1,200 |  |  |  |  |  |  |  |  |  |
Peru |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental capital investment | $ |  |  |  |  |  |  |  |  |  |  | $ 58.7 | 60.8 |  |  |  |
Number of atmospheric basins established that require further attention | item |  |  |  |  |  |  |  |  |  | 3 | 3 |  |  |  |  |
Number of months for identification of contaminated sites and around in facilities |  |  |  |  |  |  | 12 months |  |  |  |  |  |  |  |  |
Period for preparation of decontamination plan |  |  |  |  |  |  | P24M |  |  |  |  |  |  |  |  |
Period of extension for preparation of decontamination plan |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |  |
Number of days in which results of soil confirmation tests are to be presented to authorities |  |  |  |  |  |  | 30 days |  |  |  |  |  |  |  |  |
Mexico |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental capital investment | $ |  |  |  |  |  |  |  |  |  |  | $ 101.2 | $ 15.4 |  |  |  |
Number of categories of collective actions | category |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |
Minimum number of people claiming injury due to collective action initiative in Civil Federal Procedures Code (CFPC) | person |  |  |  |  |  |  |  |  |  |  |  |  |  | 30 |  |
Acciones Colectivas de Sinaloa |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of collective action lawsuits |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Number of lawsuits dismissed | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Francisca Garcia Enriquez |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of constitutional action lawsuits |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |
Maria Elena Heredia Bustamante et al, Martin Eligio Ortiz Gamez et al and Maria de los Angeles Enriquez Bacame et al |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of additional constitutional lawsuits filed |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |

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- Definition Represents the amount contributed to the Mexican Federal Government trust. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Number of subsidiaries to which environmental impact authorizations were granted. + References No definition available. + Details
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