XML 61 R34.htm IDEA: XBRL DOCUMENT
v2.4.0.6

STOCKHOLDERS' EQUITY: (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2012
STOCKHOLDERS' EQUITY: |
Schedule of activity in treasury stock |
|  | 2012 |  | 2011 |
Southern Copper common shares |  |  |  |  |
Balance as of January 1, |  | $ | 734.1 |  | $ | 461.0 |
Purchase of shares |  |  |  |  |
Stock dividend |  | (151.4 | ) | — |
Balance as of March 31, |  | 582.7 |  | 461.0 |
Parent Company (Grupo Mexico) common shares |  |  |  |  |
Balance as of January 1, |  | 163.7 |  | 161.7 |
Other activity, including dividend, interest and currency translation effect |  | 13.7 |  | 7.9 |
Balance as of March 31, |  | 177.4 |  | 169.6 |
Treasury stock balance as of March 31, |  | $ | 760.1 |  | $ | 630.6 |
Deduction from the amount to be paid to the employee in case of voluntary resignation |
If the resignation occurs during: |  | % Deducted |
1st year after the grant date |  | 90 | %
2nd year after the grant date |  | 80 | %
3rd year after the grant date |  | 70 | %
4th year after the grant date |  | 60 | %
5th year after the grant date |  | 50 | %
6th year after the grant date |  | 40 | %
7th year after the grant date |  | 20 | %
Deduction from the amount to be paid to the employee in case of involuntary termination |
If the termination occurs during: |  | % Deducted |
1st year after the grant date |  | 100 | %
2nd year after the grant date |  | 95 | %
3rd year after the grant date |  | 90 | %
4th year after the grant date |  | 80 | %
5th year after the grant date |  | 70 | %
6th year after the grant date |  | 60 | %
7th year after the grant date |  | 50 | %
Employee stock purchase plan |
Share based compensation plan |
Schedule of stock award activity of the Employee Stock Purchase Plan |
|  | Shares |  | Unit Weighted Average Grant Date Fair Value |
Outstanding shares at January 1, 2011 |  | 10,920,693 |  | $ | 1.16 |
Granted |  | — |  | — |
Exercised |  | (2,800,805 | ) | 1.16 |
Forfeited |  | — |  |  |
Outstanding shares at March 31, 2011 |  | 8,119,888 |  | $ | 1.16 |
Outstanding shares at January 1, 2012 |  | 7,270,341 |  | $ | 1.16 |
Granted |  | — |  | — |
Exercised |  | (36,303 | ) | $ | 1.16 |
Forfeited |  | (90,204 | ) | $ | 1.16 |
Outstanding shares at March 31, 2012 |  | 7,143,834 |  | $ | 1.16 |
New Employee Stock Purchase Plan |
Share based compensation plan |
Schedule of stock award activity of the Employee Stock Purchase Plan |
|  | Shares |  | Unit Weighted Average Grant Date Fair Value |
Outstanding shares at January 1, 201 2 |  | 3,807,146 |  | $ | 2.05 |
Granted |  | — |  | — |
Exercised |  | (636,945 | ) | $ | 2.05 |
Forfeited |  | (51,675 | ) | $ | 2.05 |
Outstanding shares at March 31, 201 2 |  | 3,118,526 |  | $ | 2.05 |
Outstanding shares at January 1, 2011 |  | 3,901,901 |  | $ | 2.05 |
Granted |  | — |  | — |
Exercised |  | — |  | $ | — |
Forfeited |  | — |  | $ | — |
Outstanding shares at March 31, 2011 |  | 3,901,901 |  | $ | 2.05 |

X
- Definition Tabular disclosure of rates of deduction from the amount payable to employees applied for the shared based compensation plan in case of termination of service by way of involuntary termination. + References No definition available. + Details
Name: | scco_ScheduleOfDeductionFromAmountPayableUnderEmployeeStockPurchasePlanOnServiceTerminationByInvoluntaryResignationTableTextBlock
Namespace Prefix: | scco_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of rates of deduction from the amount payable to employees applied for the shared based compensation plan in case of termination of service by voluntary resignation. + References No definition available. + Details
Name: | scco_ScheduleOfDeductionFromAmountPayableUnderEmployeeStockPurchasePlanOnServiceTerminationByVoluntaryResignationTableTextBlock
Namespace Prefix: | scco_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number of shares authorized to be purchased, the number of shares purchased at the beginning and end of the period, the number of shares purchased during the period, the weighted-average purchase price of stock purchased under the plan and the weighted average per share fair value of stock purchased under the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (g) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationEmployeeStockPurchasePlanActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's treasury stock, including the average cost per share, carrying basis for each class of treasury stock, description of share repurchase program authorized by an entity's board of directors, the number of shares repurchased, the cost of the shares repurchased, the remaining maximum dollar value of shares available for repurchase under the program, the treatment of the purchase price in excess of the current market value, number of shares held for each class of treasury stock, and other information necessary to a fair presentation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 + Details
Name: | us-gaap_ScheduleOfTreasuryStockByClassTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StockholdersEquityNoteAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration