XML 63 R42.htm IDEA: XBRL DOCUMENT
v3.20.4

STOCKHOLDERS' EQUITY (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Share based Compensation Plan |
Schedule of activity in treasury stock | ​ Activity in treasury stock in the years 2020 and 2019 was as follows (in millions): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
Southern Copper common shares | ​ | ​ | ​ | ​ | ​ | ​
Balance as of January 1, | ​ | $ | 2,767.9 | ​ | $ | 2,768.3
Used for corporate purposes | ​ |  | (0.4) | ​ |  | (0.4)
Balance as of December 31, | ​ |  | 2,767.5 | ​ |  | 2,767.9
​ | ​ | ​ | ​ | ​ | ​ | ​
Parent Company (Grupo Mexico) common shares | ​ | ​ | ​ | ​ | ​ | ​
Balance as of January 1, | ​ |  | 281.0 | ​ |  | 251.3
Other activity, including dividend, interest and foreign currency transaction effect | ​ |  | 15.0 | ​ |  | 29.7
Balance as of December 31, | ​ |  | 296.0 | ​ |  | 281.0
Treasury stock balance as of December 31, | ​ | $ | 3,063.5 | ​ | $ | 3,048.9
Schedule of activity in Directors' Stock Award Plan | ​
​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
Total SCC shares reserved for the plan |  | 600,000 |  | 600,000
Total shares granted at January 1, |  | (377,200) |  | (362,800)
Granted in the period |  | (14,400) |  | (14,400)
Total shares granted at December 31, |  | (391,600) |  | (377,200)
Remaining shares reserved |  | 208,400 |  | 222,800
​
Employee Stock Purchase 2015 Plan |
Share based Compensation Plan |
Schedule of stock based compensation expense and unrecognized compensation expense | The stock-based compensation expense for the years ended December 31, 2020, 2019 and 2018 and the unrecognized compensation expense under this plan were as follows (in millions):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019 |  | 2018
Stock based compensation expense | ​ | $ | 0.6 | ​ | $ | 0.6 | ​ | $ | 0.6
Unrecognized compensation expense | ​ | $ | 1.4 | ​ | $ | 2.0 | ​ | $ | 2.6
​
Schedule of stock award activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Unit Weighted Average
​ | ​ | Shares | ​ | Grant Date Fair Value
Outstanding shares at January 1, 2020 |  | 1,379,734 | ​ | $ | 2.63
Granted |  | — | ​ |  | ​
Exercised |  | (115,324) | ​ | $ | 2.63
Forfeited |  | — | ​ |  | —
Outstanding shares at December 31, 2020 |  | 1,264,410 | ​ | $ | 2.63
Outstanding shares at January 1, 2019 |  | 1,840,336 | ​ | $ | 2.63
Granted |  | — | ​ |  | —
Exercised |  | (460,602) | ​ | $ | 2.63
Forfeited |  | — | ​ |  | —
Outstanding shares at December 31, 2019 |  | 1,379,734 | ​ | $ | 2.63
Employee Stock Purchase 2018 Plan |
Share based Compensation Plan |
Schedule of stock based compensation expense and unrecognized compensation expense | ​ The stock-based compensation expense for the years ended December 31, 2020 and 2019 and the unrecognized compensation expense under this plan were as follows (in millions): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 | ​ | 2019
Stock based compensation expense | ​ | $ | 0.7 |  | $ | 0.7
Unrecognized compensation expense | ​ | $ | 3.8 |  | $ | 4.5
Schedule of stock award activity | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Unit Weighted Average
​ |  | Shares |  | Grant Date Fair Value
Outstanding shares at January 1, 2020 |  | 4,002,898 | $ | 1.86
Granted |  | — | ​ | ​
Exercised |  | (84,440) | $ | 1.86
Forfeited |  | — |  | ​
Outstanding shares at December 31, 2020 |  | 3,918,458 | $ | 1.86
Outstanding shares at January 1, 2019 | ​ | 2,782,424 | $ | 1.86
Granted | ​ | 1,238,169 | $ | 1.86
Exercised | ​ | (17,695) | $ | 1.86
Forfeited | ​ | — |  | —
Outstanding shares at December 31, 2019 |  | 4,002,898 | $ | 1.86

X
- Definition Tabular disclosure of the recognized and unrecognized expense arising from equity-based compensation arrangements. + References No definition available. + Details
Name: | scco_ScheduleOfStockBasedCompensationExpenseAndUnrecognizedCompensationExpenseTableTextBlock
Namespace Prefix: | scco_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of employee stock purchase plan activity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=120381028&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 the number and weighted-average exercise prices (or conversion ratios) for stock awards granted to nonemployee directors that were outstanding at the beginning and end of the year, and the number of awards that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationNonemployeeDirectorStockAwardPlanActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
Name: | us-gaap_ScheduleOfTreasuryStockByClassTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PlanNameAxis=scco_EmployeeStockPurchase2015PlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=scco_EmployeeStockPurchase2018PlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |