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SEGMENT AND RELATED INFORMATION: (Details) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) segment | Jun. 30, 2017 USD ($) | Dec. 31, 2017 USD ($)
Financial information related to segments |  |  |  |  |
Number of reportable segments | segment |  |  | 3 |  |
Financial information relating to segments |  |  |  |  |
Net sales | $ 1,837.2 | $ 1,529.8 | $ 3,678.4 | $ 3,113.8 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 851.7 | 804.8 | 1,728.2 | 1,648.6 |
Selling, general and administrative | 26.2 | 22.2 | 50.3 | 43.6 |
Depreciation, amortization and depletion | 162.6 | 171.2 | 324.6 | 324.6 |
Exploration | 9.1 | 5.7 | 14.3 | 10.8 |
Environmental remediation |  |  |  | (10.2) |
Operating income | 787.6 | 525.9 | 1,561.0 | 1,096.4 |
Interest, net | (65.8) | (71.7) | (132.5) | (161.6) |
Other income (expense) | (3.1) | 3.1 | (5.5) | 7.8 |
Income taxes | (309.1) | (160.3) | (545.7) | (336.6) |
Equity earnings of affiliate | 1.5 | 3.5 | 5.6 | 9.7 |
Non-controlling interest | (1.5) | (0.8) | (2.6) | (1.6) |
Net income attributable to SCC | 409.6 | 299.7 | 880.3 | 614.1 |
Capital investment | 253.9 | 252.1 | 549.6 | 497.7 |
Property and mine development, net | 9,172.6 | 8,837.5 | 9,172.6 | 8,837.5 | $ 9,099.6
Total assets | 14,045.9 | 13,515.3 | 14,045.9 | 13,515.3 | $ 13,780.1
Corporate, other and eliminations |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | (18.8) | (17.6) | (38.4) | (38.1) |
Cost of sales (exclusive of depreciation, amortization and depletion) | (21.5) | (21.6) | (41.7) | (41.4) |
Selling, general and administrative | 1.0 | 0.6 | 1.4 | 0.8 |
Depreciation, amortization and depletion | 11.7 | 1.6 | 18.4 | 7.7 |
Exploration | 0.5 | 1.9 | 1.2 | 3.7 |
Operating income | (10.5) | (0.1) | (17.7) | (9.0) |
Capital investment | 16.6 | 1.6 | 18.7 | 1.8 |
Property and mine development, net | 739.8 | 229.0 | 739.8 | 229.0 |
Total assets | 876.0 | (659.1) | 876.0 | (659.1) |
Mexican Open-pit |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 1,061.1 | 899.8 | 2,129.7 | 1,852.0 |
Mexican Open-pit | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 1,061.1 | 899.8 | 2,129.7 | 1,852.0 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 404.7 | 391.5 | 816.1 | 856.4 |
Selling, general and administrative | 13.7 | 11.1 | 25.6 | 21.1 |
Depreciation, amortization and depletion | 81.9 | 100.0 | 174.4 | 198.6 |
Exploration | 0.5 | 0.7 | 1.1 | 1.2 |
Environmental remediation |  |  |  | (10.2) |
Operating income | 560.3 | 396.5 | 1,112.5 | 784.9 |
Capital investment | 79.5 | 88.8 | 144.2 | 146.1 |
Property and mine development, net | 4,490.7 | 5,149.8 | 4,490.7 | 5,149.8 |
Total assets | 7,659.1 | 8,660.5 | 7,659.1 | 8,660.5 |
Mexican IMMSA Unit |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 134.3 | 107.3 | 264.0 | 217.6 |
Mexican IMMSA Unit | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 153.1 | 124.9 | 302.4 | 255.7 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 100.9 | 91.4 | 196.4 | 174.4 |
Selling, general and administrative | 2.5 | 2.0 | 4.9 | 4.2 |
Depreciation, amortization and depletion | 11.1 | 12.5 | 22.1 | 25.9 |
Exploration | 1.2 | 0.9 | 2.5 | 1.6 |
Operating income | 37.4 | 18.1 | 76.5 | 49.6 |
Capital investment | 9.8 | 6.0 | 22.4 | 13.0 |
Property and mine development, net | 433.2 | 376.0 | 433.2 | 376.0 |
Total assets | 951.2 | 868.3 | 951.2 | 868.3 |
Mexican IMMSA Unit | Intersegment sales |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 18.8 | 17.6 | 38.4 | 38.1 |
Peruvian Operations |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 641.8 | 522.7 | 1,284.7 | 1,044.2 |
Peruvian Operations | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 641.8 | 522.7 | 1,284.7 | 1,044.2 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 367.6 | 343.5 | 757.4 | 659.2 |
Selling, general and administrative | 9.0 | 8.5 | 18.4 | 17.5 |
Depreciation, amortization and depletion | 57.9 | 57.1 | 109.7 | 92.4 |
Exploration | 6.9 | 2.2 | 9.5 | 4.3 |
Operating income | 200.4 | 111.4 | 389.7 | 270.8 |
Capital investment | 148.0 | 155.7 | 364.3 | 336.8 |
Property and mine development, net | 3,508.9 | 3,082.7 | 3,508.9 | 3,082.7 |
Total assets | $ 4,559.6 | $ 4,645.6 | $ 4,559.6 | $ 4,645.6 |

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