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SEGMENT AND RELATED INFORMATION: (Details) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) segment | Sep. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Financial information related to segments |  |  |  |  |
Number of reportable segments | segment |  |  | 3 |  |
Financial information relating to segments |  |  |  |  |
Net sales | $ 1,676.5 | $ 1,400.7 | $ 4,790.2 | $ 3,980.8 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 781.5 | 831.4 | 2,430.2 | 2,309.9 |
Selling, general and administrative | 25.0 | 22.7 | 68.6 | 72.5 |
Depreciation, amortization and depletion | 169.3 | 174.5 | 493.8 | 474.3 |
Exploration | 8.1 | 9.7 | 18.9 | 30.4 |
Environmental remediation |  |  | (10.2) |  |
Operating income | 692.6 | 362.4 | 1,788.9 | 1,093.7 |
Interest, net | (69.8) | (71.3) | (231.4) | (214.1) |
Other income (expense) | (6.2) | 9.6 | 1.6 | 14.9 |
Income taxes | (220.1) | (111.2) | (556.6) | (305.4) |
Equity earnings of affiliate | 6.3 | 8.7 | 16.1 | 17.4 |
Non-controlling interest | (1.0) | (0.6) | (2.6) | (1.9) |
Net income attributable to SCC | 401.8 | 197.6 | 1,016.0 | 604.6 |
Capital investment | 212.7 | 275.6 | 710.4 | 840.5 |
Property and mine development, net | 8,928.3 | 8,581.4 | 8,928.3 | 8,581.4 | $ 8,766.5
Total assets | 13,982.4 | 13,063.0 | 13,982.4 | 13,063.0 | $ 13,234.3
Intersegment sales |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales |  |  | (54.1) | (53.5) |
Corporate, other and eliminations |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | (16.0) | (19.0) |  |  |
Cost of sales (exclusive of depreciation, amortization and depletion) | (16.5) | (46.8) | (57.8) | (152.7) |
Selling, general and administrative | (0.7) | 0.3 | 0.1 | 1.0 |
Depreciation, amortization and depletion | 4.0 | 10.2 | 11.6 | 5.4 |
Exploration | 0.6 | 3.4 | 4.3 | 10.5 |
Operating income | (3.4) | 13.9 | (12.3) | 82.3 |
Capital investment | 1.1 | 2.3 | 2.9 | 2.4 |
Property and mine development, net | 246.3 | 242.0 | 246.3 | 242.0 |
Total assets | 14.9 | (51.9) | 14.9 | (51.9) |
Mexican Open-pit | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 1,023.3 | 865.0 | 2,875.3 | 2,422.5 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 373.6 | 462.6 | 1,230.0 | 1,288.8 |
Selling, general and administrative | 15.3 | 11.3 | 36.4 | 37.5 |
Depreciation, amortization and depletion | 97.1 | 94.5 | 295.7 | 267.0 |
Exploration | 0.7 | 2.5 | 1.9 | 5.5 |
Environmental remediation |  |  | (10.2) |  |
Operating income | 536.6 | 294.1 | 1,321.5 | 823.7 |
Capital investment | 71.6 | 112.8 | 217.7 | 379.7 |
Property and mine development, net | 5,109.2 | 5,094.2 | 5,109.2 | 5,094.2 |
Total assets | 8,466.8 | 8,052.2 | 8,466.8 | 8,052.2 |
Mexican IMMSA Unit | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 87.5 | 94.9 | 305.0 | 247.5 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 73.8 | 73.8 | 248.2 | 215.8 |
Selling, general and administrative | 1.5 | 2.1 | 5.7 | 5.4 |
Depreciation, amortization and depletion | 13.1 | 15.8 | 39.0 | 39.6 |
Exploration | 1.9 | 1.7 | 3.5 | 4.7 |
Operating income | 13.2 | 20.5 | 62.7 | 35.5 |
Capital investment | 12.8 | 8.7 | 25.8 | 26.2 |
Property and mine development, net | 374.1 | 448.6 | 374.1 | 448.6 |
Total assets | 887.2 | 800.3 | 887.2 | 800.3 |
Mexican IMMSA Unit | Intersegment sales |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 16.0 | 19.0 | 54.1 | 53.5 |
Peruvian Operations | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 565.7 | 440.8 | 1,609.9 | 1,310.8 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 350.6 | 341.8 | 1,009.8 | 958.0 |
Selling, general and administrative | 8.9 | 9.0 | 26.4 | 28.6 |
Depreciation, amortization and depletion | 55.1 | 54.0 | 147.5 | 162.3 |
Exploration | 4.9 | 2.1 | 9.2 | 9.7 |
Operating income | 146.2 | 33.9 | 417.0 | 152.2 |
Capital investment | 127.2 | 151.8 | 464.0 | 432.2 |
Property and mine development, net | 3,198.7 | 2,796.6 | 3,198.7 | 2,796.6 |
Total assets | $ 4,613.5 | $ 4,262.4 | $ 4,613.5 | $ 4,262.4 |

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