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SEGMENT AND RELATED INFORMATION: (Details) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2017 USD ($) segment | Jun. 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 | $ 1,529.8 | $ 1,335.1 |  | $ 3,113.8 | $ 2,580.1 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 804.8 | 751.6 |  | 1,648.6 | 1,478.5 |
Selling, general and administrative | 22.2 | 23.6 |  | 43.6 | 49.9 |
Depreciation, amortization and depletion | 171.2 | 164.5 |  | 324.6 | 299.8 |
Exploration | 5.7 | 10.3 |  | 10.8 | 20.7 |
Environmental remediation |  |  |  | (10.2) |  |
Operating income | 525.9 | 385.1 |  | 1,096.4 | 731.2 |
Interest, net | (71.7) |  | $ (70.0) | (161.6) | (142.8) |
Other income (expense) | 3.1 | 5.8 |  | 7.8 | 5.4 |
Income taxes | (160.3) | (102.0) |  | (336.6) | (194.2) |
Equity earnings of affiliate | 3.5 | 3.6 |  | 9.7 | 8.7 |
Non-controlling interest | (0.8) | (0.6) |  | (1.6) | (1.3) |
Net income attributable to SCC | 299.7 | 221.9 |  | 614.1 | 407.0 |
Capital investment | 252.1 | 341.6 |  | 497.7 | 564.9 |
Property and mine development, net | 8,837.5 | 8,498.4 |  | 8,837.5 | 8,498.4 | $ 8,766.5
Total assets | 13,515.3 | 12,787.4 |  | 13,515.3 | 12,787.4 | $ 13,234.3
Intersegment sales |  |  |  |  |  |
Financial information relating to segments |  |  |  |  |  |
Net sales |  |  |  | (38.1) | (34.5) |
Corporate, other and eliminations |  |  |  |  |  |
Financial information relating to segments |  |  |  |  |  |
Net sales | (17.6) | (19.4) |  |  |  |
Cost of sales (exclusive of depreciation, amortization and depletion) | (21.6) | (65.1) |  | (41.4) | (106.0) |
Selling, general and administrative | 0.6 | 0.5 |  | 0.8 | 0.7 |
Depreciation, amortization and depletion | 1.6 | (11.4) |  | 7.7 | (4.8) |
Exploration | 1.9 | 3.4 |  | 3.7 | 7.1 |
Operating income | (0.1) | 53.2 |  | (9.0) | 68.5 |
Capital investment | 1.6 |  |  | 1.8 | 0.1 |
Property and mine development, net | 229.0 | 253.1 |  | 229.0 | 253.1 |
Total assets | (659.1) | (723.9) |  | (659.1) | (723.9) |
Mexican Open-pit | Operating segment |  |  |  |  |  |
Financial information relating to segments |  |  |  |  |  |
Net sales | 899.8 | 815.9 |  | 1,852.0 | 1,557.5 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 391.5 | 431.8 |  | 856.4 | 826.3 |
Selling, general and administrative | 11.1 | 12.7 |  | 21.1 | 26.2 |
Depreciation, amortization and depletion | 100.0 | 107.6 |  | 198.6 | 172.5 |
Exploration | 0.7 | 1.4 |  | 1.2 | 3.0 |
Environmental remediation |  |  |  | (10.2) |  |
Operating income | 396.5 | 262.4 |  | 784.9 | 529.5 |
Capital investment | 88.8 | 157.8 |  | 146.1 | 266.9 |
Property and mine development, net | 5,149.8 | 5,068.5 |  | 5,149.8 | 5,068.5 |
Total assets | 8,660.5 | 8,640.2 |  | 8,660.5 | 8,640.2 |
Mexican IMMSA Unit | Operating segment |  |  |  |  |  |
Financial information relating to segments |  |  |  |  |  |
Net sales | 107.3 | 82.7 |  | 217.6 | 152.7 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 91.4 | 73.3 |  | 174.4 | 142.0 |
Selling, general and administrative | 2.0 | 1.8 |  | 4.2 | 3.3 |
Depreciation, amortization and depletion | 12.5 | 14.4 |  | 25.9 | 23.8 |
Exploration | 0.9 | 1.3 |  | 1.6 | 3.1 |
Operating income | 18.1 | 11.3 |  | 49.6 | 15.0 |
Capital investment | 6.0 | 10.7 |  | 13.0 | 17.5 |
Property and mine development, net | 376.0 | 455.9 |  | 376.0 | 455.9 |
Total assets | 868.3 | 790.4 |  | 868.3 | 790.4 |
Mexican IMMSA Unit | Intersegment sales |  |  |  |  |  |
Financial information relating to segments |  |  |  |  |  |
Net sales | 17.6 | 19.4 |  | 38.1 | 34.5 |
Peruvian Operations | Operating segment |  |  |  |  |  |
Financial information relating to segments |  |  |  |  |  |
Net sales | 522.7 | 436.5 |  | 1,044.2 | 869.9 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 343.5 | 311.6 |  | 659.2 | 616.2 |
Selling, general and administrative | 8.5 | 8.6 |  | 17.5 | 19.7 |
Depreciation, amortization and depletion | 57.1 | 53.9 |  | 92.4 | 108.3 |
Exploration | 2.2 | 4.2 |  | 4.3 | 7.5 |
Operating income | 111.4 | 58.2 |  | 270.8 | 118.2 |
Capital investment | 155.7 | 173.1 |  | 336.8 | 280.4 |
Property and mine development, net | 3,082.7 | 2,720.9 |  | 3,082.7 | 2,720.9 |
Total assets | $ 4,645.6 | $ 4,080.7 |  | $ 4,645.6 | $ 4,080.7 |

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