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COMMITTMENTS AND CONTINGENCIES: (Details 2) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 1 Months Ended | 6 Months Ended | 12 Months Ended | 1 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 1992 Peruvian operations. | Dec. 31, 1978 Peruvian operations. | Dec. 31, 1971 Peruvian operations. | May 31, 2011 Peruvian operations. Garcia Ataucuri and Others against SCC's Peruvian Branch | Apr. 30, 1996 Peruvian operations. Garcia Ataucuri and Others against SCC's Peruvian Branch | Jun. 30, 2011 Peruvian operations. Garcia Ataucuri and Others against SCC's Peruvian Branch | Dec. 31, 1995 Peruvian operations. Garcia Ataucuri and Others against SCC's Peruvian Branch | Aug. 31, 2009 Peruvian operations. Exploraciones de Concesiones Metalicas S.A.C. ("Excomet") | Jun. 30, 2011 Peruvian operations. Garcia Ataucuri litigation | Feb. 19, 2010 Mexican operations. Pasta de Conchos Accident
Litigation matter |  |  |  |  |  |  |  |  |  |
Number of widows of miners who filed a complaint |  |  |  |  |  |  |  |  |  | 3
Number of former employees who filed the complaint |  |  |  | 216 | 800 |  |  |  |  |
Statutory participation of mine workers in pre-tax profit (as a percent) | 8.00% |  | 10.00% |  |  |  |  |  |  |
Statutory participation of mine workers in pre-tax profit paid in cash (as a percent) | 100.00% | 4.00% | 40.00% |  |  |  |  |  |  |
Statutory participation of mine workers in pre-tax profit received as equity interest of enterprise (as a percent) |  |  | 60.00% |  |  |  |  |  |  |
Percentage of pre-tax profits delivered as "labor shares" (as a percent) |  | 5.50% |  |  |  |  |  |  |  |
Percentage of issued labor shares exchanged for common stock (as a percent) |  |  |  |  |  |  | 80.80% |  |  |
Percentage of issued labor shares pending to be exchanged for common stock (as a percent) |  |  |  |  |  | 0.71% |  |  |  |
Damages sought by the plaintiff |  |  |  |  |  |  |  |  | 38,763,806.80 "labor shares" (acciones laborales), now "investment shares" (acciones de inversion) (or nuevos soles ("S/.") 3,876,380,679.56), plus dividends |
Purchase price of shares paid to former stockholders |  |  |  |  |  |  |  | $ 2 |  |

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- Definition Represents the percentage of pre-tax profit provided to mine workers in cash in statutory participation enacted by the law. + Details
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- Definition Represents the percentage of pre-tax profit provided to mine workers in equity interest of the enterprise in statutory participation enacted by the law. + Details
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- Definition Describes the form and magnitude of the award the plaintiff seeks in the legal matter, which may include an unspecified amount of money. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14557-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10, 11, 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349 + Details
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