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SEGMENT AND RELATED INFORMATION: (Details) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) segment | Sep. 30, 2015 USD ($) | Dec. 31, 2015 USD ($)
Financial information related to segments |  |  |  |  |
Number of reportable segments | segment |  |  | 3 |  |
Financial information relating to segments |  |  |  |  |
Net sales outside of segments | $ 1,400.7 | $ 1,133.6 | $ 3,980.8 | $ 3,791.3 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 831.4 | 670.8 | 2,309.9 | 2,057.4 |
Selling, general and administrative | 22.7 | 23.6 | 72.5 | 73.4 |
Depreciation, amortization and depletion | 174.5 | 131.6 | 474.3 | 373.8 |
Exploration | 9.7 | 13.7 | 30.4 | 36.2 |
Environmental remediation |  | 7.0 |  | 23.5 |
Operating income | 362.4 | 286.9 | 1,093.7 | 1,227.0 |
Interest, net | (71.3) | (61.9) | (214.1) | (136.2) |
Other income (expense) | 9.6 | (4.3) | 14.9 | (9.6) |
Income taxes | (111.2) | (125.3) | (305.4) | (411.6) |
Equity earnings of affiliate | 8.7 | 4.0 | 17.4 | 9.5 |
Non-controlling interest | (0.6) | (1.0) | (1.9) | (3.5) |
Net income attributable to SCC | 197.6 | 98.4 | 604.6 | 675.6 |
Capital investment | 275.6 | 416.6 | 840.5 | 946.3 |
Property, net | 8,581.4 | 7,872.9 | 8,581.4 | 7,872.9 | $ 8,262.8
Total assets | 13,063.0 | 12,732.3 | 13,063.0 | 12,732.3 | $ 12,593.2
Payment to acquire business, net of cash acquired |  | 100.4 |  | 100.4 |
Corporate, other and eliminations |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales outside of segments | (19.0) | (19.0) | (53.5) | (53.4) |
Cost of sales (exclusive of depreciation, amortization and depletion) | (46.8) | (48.1) | (152.7) | (67.9) |
Selling, general and administrative | 0.3 | (2.3) | 1.0 | 2.9 |
Depreciation, amortization and depletion | 10.2 | (0.1) | 5.4 | 1.6 |
Exploration | 3.4 | 4.7 | 10.5 | 14.0 |
Operating income | 13.9 | 26.8 | 82.3 | (4.0) |
Capital investment | 2.3 | 96.2 | 2.4 | 104.0 |
Property, net | 242.0 | 58.0 | 242.0 | 58.0 |
Total assets | (51.9) | 1,215.1 | (51.9) | 1,215.1 |
Corporate, other and eliminations | El Pilar |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Payment to acquire business, net of cash acquired |  | 100.4 |  | 100.4 |
Mexican Open-pit | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales outside of segments | 865.0 | 597.6 | 2,422.5 | 1,995.3 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 462.6 | 333.5 | 1,288.8 | 929.8 |
Selling, general and administrative | 11.3 | 15.4 | 37.5 | 36.3 |
Depreciation, amortization and depletion | 94.5 | 62.7 | 267.0 | 177.2 |
Exploration | 2.5 | 3.4 | 5.5 | 5.2 |
Environmental remediation |  | 7.0 |  | 23.5 |
Operating income | 294.1 | 175.6 | 823.7 | 823.3 |
Capital investment | 112.8 | 215.2 | 379.7 | 601.2 |
Property, net | 5,094.2 | 4,824.7 | 5,094.2 | 4,824.7 |
Total assets | 8,052.2 | 7,303.4 | 8,052.2 | 7,303.4 |
Mexican IMMSA Unit | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales outside of segments | 94.9 | 68.4 | 247.5 | 245.8 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 73.8 | 80.3 | 215.8 | 247.8 |
Selling, general and administrative | 2.1 | 1.5 | 5.4 | 4.9 |
Depreciation, amortization and depletion | 15.8 | 9.0 | 39.6 | 24.6 |
Exploration | 1.7 | 3.4 | 4.7 | 8.5 |
Operating income | 20.5 | (6.8) | 35.5 | 13.4 |
Capital investment | 8.7 | 14.0 | 26.2 | 29.4 |
Property, net | 448.6 | 393.9 | 448.6 | 393.9 |
Total assets | 800.3 | 815.8 | 800.3 | 815.8 |
Mexican IMMSA Unit | Intersegment sales |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales outside of segments | 19.0 | 19.0 | 53.5 | 53.4 |
Peruvian Operations | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales outside of segments | 440.8 | 467.6 | 1,310.8 | 1,550.2 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 341.8 | 305.1 | 958.0 | 947.7 |
Selling, general and administrative | 9.0 | 9.0 | 28.6 | 29.3 |
Depreciation, amortization and depletion | 54.0 | 60.0 | 162.3 | 170.4 |
Exploration | 2.1 | 2.2 | 9.7 | 8.5 |
Operating income | 33.9 | 91.3 | 152.2 | 394.3 |
Capital investment | 151.8 | 91.2 | 432.2 | 211.7 |
Property, net | 2,796.6 | 2,596.3 | 2,796.6 | 2,596.3 |
Total assets | $ 4,262.4 | $ 3,398.0 | $ 4,262.4 | $ 3,398.0 |

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