STOCKHOLDERS' EQUITY: (Tables)

12 Months Ended

Dec. 31, 2013

Share based compensation plan

Schedule of activity in treasury stock

Activity in treasury stock in the years 2013 and 2012 was as follows (in millions):

	2013			2012
Southern Copper common shares
Balance as of January 1,	$	729.8		$	734.1
Purchase of shares	281.4			147.3
Stock dividend distribution	—			(151.4		)
Used for corporate purposes	(0.2		)	(0.2		)
Balance as of December 31,	1,011.0			729.8
Parent Company (Grupo Mexico) common shares
Balance as of January 1,	189.0			163.7
Other activity, including dividend, interest and currency translation effect	16.6			25.3
Balance as of December 31,	205.6			189.0
Treasury stock balance as of December 31,	$	1,216.6		$	918.8

Schedule of share repurchase program activity

Period			Total Number of Shares	Average Price Paid per		Total Number of Shares Purchased as Part of Publicly	Maximum Number of Shares that May Yet Be Purchased Under the Plan	Total Cost($ in
From	To		Purchased	Share		Announced Plan	@ $28.71 (*)	millions)
2008:			28,510,150	$	13.49	28,510,150		$	384.7
2009:			4,912,000	14.64		33,422,150		71.9
2010:			15,600	29.69		33,437,750		0.5
2011:			9,034,400	30.29		42,472,150		273.7
2012:			4,442,336	33.17		46,914,486		147.3
2013:
04/01/13	04/30/13		1,500	32.96		46,915,986		0.1
05/01/13	05/31/13		807,100	32.33		47,723,086		26.1
06/01/13	06/30/13		1,350,000	29.05		49,073,086		39.2
Total second quarter			2,158,600	30.28				65.4
07/01/13		07/31/13	1,300,000	27.60		50,373,086		35.9
08/01/13		08/31/13	641,400	26.68		51,014,486		17.1
09/01/13		09/30/13	204,012	27.65		51,218,498		5.6
Total third quarter			2,145,412	27.33				58.6
10/01/13		10/31/13	1,552,100	27.68		52,770,598		42.9
11/01/13		11/30/13	2,446,490	26.49		55,217,088		64.8
12/01/13		12/31/13	1,942,398	25.58		57,159,486		49.7
Total fourth quarter 2013			5,940,988	26.50				157.4
Total purchased			57,159,486	$	20.29		29,275,745	$	1,159.5

(*) NYSE closing price of SCC common shares at December 31, 2013

Schedule of activity in Directors' Stock Award Plan

	2013		2012
Total SCC shares reserved for the plan	600,000		600,000
Total shares granted at January 1,	(285,600	)	(271,200	)
Granted in the period	(12,000	)	(14,400	)
Total shares granted at December 31,	(297,600	)	(285,600	)
Remaining shares reserved	302,400		314,400

Employee Stock Purchase Plan

Share based compensation plan

Schedule of stock based compensation expense and unrecognized compensation expense

	2013		2012		2011
Stock based compensation expense	$	2.1	$	2.1	$	2.1
Unrecognized compensation expense	$	2.1	$	4.2	$	6.3

Schedule of stock award activity of the Employee Stock Purchase Plan

	Shares		Unit Weighted AverageGrant Date Fair Value
Outstanding shares at January 1, 2013	6,955,572		$	1.16
Granted	—		—
Exercised	(2,474,814	)	1.16
Forfeited	(31,159	)	1.16
Outstanding shares at December 31, 2013	4,449,599		1.16
Outstanding shares at January 1, 2012	7,270,341		1.16
Granted	—		—
Exercised	(220,430	)	1.16
Forfeited	(94,339	)	1.16
Outstanding shares at December 31, 2012	6,955,572		$	1.16

New Employee Stock Purchase Plan

Share based compensation plan

Schedule of stock based compensation expense and unrecognized compensation expense

	2013		2012		2011
Stock based compensation expense	$	0.6	$	0.6	$	0.6
Unrecognized compensation expense	$	2.6	$	3.2	$	3.8

Schedule of stock award activity of the Employee Stock Purchase Plan

	Shares		Unit Weighted AverageGrant Date Fair Value
Outstanding shares at January 1, 2013	2,944,742		$	2.05
Granted	226,613		2.05
Exercised	(38,098	)	2.05
Forfeited	(120,793	)	2.05
Outstanding shares at December 31, 2013	3,012,464		2.05
Outstanding shares at January 1, 2012	3,807,146		2.05
Granted	—		—
Exercised	(772,850	)	2.05
Forfeited	(89,554	)	2.05
Outstanding shares at December 31, 2012	2,944,742		$	2.05