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SEGMENT AND RELATED INFORMATION: (Tables)

12 Months Ended

Dec. 31, 2017

SEGMENT AND RELATED INFORMATION:

Schedule of financial information relating to Company's segments

		Year Ended December 31, 2017
		(in millions)
		Mexican Open-pit			Mexican IMMSA Unit			Peruvian Operations			Corporate, other and eliminations			Consolidated
Net sales outside of segments		$	3,972.7		$	437.7		$	2,244.1		$	—		$	6,654.5
Intersegment sales			—			71.0			—			(71.0	)		—
Cost of sales (exclusive of depreciation, amortization and depletion)			1,594.3			365.3			1,362.8			(69.6	)		3,252.8
Selling, general and administrative			47.9			7.9			36.2			1.1			93.1
Depreciation, amortization and depletion			401.0			56.2			203.6			10.3			671.1
Exploration			2.7			5.5			14.4			6.2			28.8
Environmental remediation			(10.2	)		—			—			—			(10.2	)
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Operating income		$	1,937.0		$	73.8		$	627.1		$	(19.0	)		2,618.9
Less:
Interest, net															(300.5	)
Other income (expense)															(15.7	)
Income taxes															(1,593.4	)
Equity earnings of affiliate															23.1
Non-controlling interest															(3.9	)
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Net income attributable to SCC														$	728.5
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Capital investment		$	297.6		$	36.5		$	685.4		$	4.0		$	1,023.5
Property and mine development, net		$	5,004.5		$	366.9		$	3,389.8		$	338.4		$	9,099.6
Total assets		$	8,323.1		$	889.1		$	4,314.5		$	253.4		$	13,780.1

		Year Ended December 31, 2016
		(in millions)
		Mexican Open-pit			Mexican IMMSA Unit			Peruvian Operations			Corporate, other and eliminations			Consolidated
Net sales outside of segments		$	3.234.3		$	351.1		$	1,794.4		$	—		$	5,379.8
Intersegment sales			—			72.0			—			(72.0	)		—
Cost of sales (exclusive of depreciation, amortization and depletion)			1,523.2			304.1			1,280.2			(73.4	)		3,034.1
Selling, general and administrative			47.1			7.4			37.5			2.3			94.3
Depreciation, amortization and depletion			364.7			49.8			217.1			15.5			647.1
Exploration			5.2			5.0			13.0			16.9			40.1
Environmental remediation			—			—			—			—			—
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Operating income		$	1,294.1		$	56.8		$	246.6		$	(33.3	)		1,564.2
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Less:
Interest, net															(283.6	)
Other income (expense)															(24.6	)
Income taxes															(501.1	)
Equity earnings of affiliate															23.9
Non-controlling interest															(2.3	)
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Net income attributable to SCC														$	776.5
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Capital investment		$	537.0		$	35.8		$	541.0		$	4.7		$	1,118.5
Property and mine development, net		$	5,136.8		$	448.7		$	2,949.3		$	231.7		$	8,766.5
Total assets		$	8.174.4		$	825.0		$	4,225.3		$	9.6		$	13,234.3

		Year Ended December 31, 2015
		(in millions)
		Mexican Open-pit			Mexican IMMSA Unit			Peruvian Operations			Corporate, other and eliminations			Consolidated
Net sales outside of segments		$	2,703.9		$	320.7		$	2,021.3		$	—		$	5,045.9
Intersegment sales			—			67.6			—			(67.6	)		—
Cost of sales (exclusive of depreciation, amortization and depletion)			1,390.0			323.8			1,289.0			(75.2	)		2,927.6
Selling, general and administrative			50.5			6.4			41.4			1.1			99.4
Depreciation, amortization and depletion			265.0			34.8			228.1			(17.2	)		510.7
Exploration			7.8			9.6			11.9			19.5			48.8
Environmental remediation			45.0			—			—			—			45.0
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Operating income		$	945.6		$	13.7		$	450.9		$	4.2			1,414.4
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Less:
Interest, net															(199.9	)
Other income (expense)															(25.3	)
Income taxes															(464.9	)
Equity earnings of affiliate															16.8
Non-controlling interest															(4.7	)
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Net income attributable to SCC														$	736.4
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Capital investment(*)		$	820.5		$	39.2		$	285.2		$	105.1		$	1,250.0
Property and mine development, net		$	4,879.3		$	395.8		$	2,583.5		$	404.2		$	8,262.8
Total assets		$	7,459.8		$	787.5		$	3,962.6		$	383.3		$	12,593.2

(*)           Corporate, other and eliminations includes $100.4 million purchase of the El Pilar mining property acquisition.

Schedule of sales value per segment

		Year Ended December 31, 2017
(in millions)		Mexican Open-pit			Mexican IMMSA Unit			Peruvian Operations			Corporate, Other & Eliminations			Total Consolidated
Copper		$	3,480.2		$	37.2		$	1,996.4		$	(37.3	)	$	5,476.5
Molybdenum			224.0			—			129.4			—			353.4
Silver			170.7			71.9			70.6			(26.9	)		286.3
Zinc			—			327.2			—			(0.6	)		326.6
Other			97.8			73.2			47.7			(7.0	)		211.7
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Total		$	3,972.7		$	509.5		$	2,244.1		$	(71.8	)	$	6,654.5
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​

		Year Ended December 31, 2016
(in millions)		Mexican Open-pit			Mexican IMMSA Unit			Peruvian Operations			Corporate, Other & Eliminations			Total Consolidated
Copper		$	2,663.1		$	32.0		$	1,557.7		$	(32.0	)	$	4,220.8
Molybdenum			144.0			—			124.0			—			268.0
Silver			182.3			82.1			61.5			(31.6	)		294.3
Zinc			—			234.4			—			—			234.4
Other			244.9			74.6			51.2			(8.4	)		362.3
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Total		$	3,234.3		$	423.1		$	1,794.4		$	(72.0	)	$	5,379.8
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​

		Year Ended December 31, 2015
(in millions)		Mexican Open-pit			Mexican IMMSA Unit			Peruvian Operations			Corporate, Other & Eliminations			Total Consolidated
Copper		$	2,237.2		$	30.6		$	1,756.9		$	(30.6	)	$	3,994.1
Molybdenum			109.0			—			130.0			—			239.0
Silver			129.5			66.5			57.2			(26.5	)		226.7
Zinc			—			210.7			—			—			210.7
Other			228.2			80.5			77.2			(10.5	)		375.4
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
Total		$	2,703.9		$	388.3		$	2,021.3		$	(67.6	)	$	5,045.9
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​

Schedule of net sales by countries

        The geographic breakdown of the Company's sales for the three years ended December 31, 2017 were as follows (in millions):

		2017			2016			2015
The Americas:
Mexico		$	1,551.5		$	1,409.7		$	1,641.0
United States			1,162.5			1,050.0			864.0
Peru			374.3			294.4			324.3
Brazil			240.1			196.0			276.4
Chile			103.4			92.4			102.0
Other American countries			91.5			74.3			89.2
Europe:
Switzerland			602.4			398.1			294.9
Italy			332.4			343.8			324.1
Other European countries			480.0			273.1			125.4
Asia:
Singapore			1,051.3			652.7			312.8
Japan			479.5			409.8			335.0
Other Asian countries			185.6			185.5			356.8
​	​	​	​	​	​	​	​	​	​	​
Total		$	6,654.5		$	5,379.8		$	5,045.9
​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​

Schedule of provisionally priced copper and molybdenum sales outstanding

		Sales volume (million lbs.)			Priced at (per pound)			Month of settlement
Copper			56.3			3.28		January through March 2018
Molybdenum			10.0			10.25		January through March 2018

Schedule of provisional sales price adjustments included in accounts receivable and net sales

        Provisional sales price adjustments included in accounts receivable and net sales were as follows at December, 31 (in millions):

		At December 31,
		2017			2016
Copper		$	8.3		$	6.2
Molybdenum			14.6			(0.4	)
​	​	​	​	​	​	​	​
Total		$	22.9		$	5.8
​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​

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