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SEGMENT AND RELATED INFORMATION: (Details) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) segment | Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Financial information related to segments |  |  |  |  |
Number of reportable segments | segment |  |  | 3 |  |
Financial information relating to segments |  |  |  |  |
Net sales | $ 2,680.9 | $ 2,129.1 | $ 8,110.4 | $ 5,634.2 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 927.5 | 948.9 | 2,856.8 | 2,881.3 |
Selling, general and administrative | 31.3 | 33.4 | 92.9 | 94.0 |
Depreciation, amortization and depletion | 203.4 | 196.0 | 599.4 | 582.8 |
Exploration | 10.9 | 6.9 | 26.7 | 21.8 |
Operating income | 1,507.8 | 943.9 | 4,534.6 | 2,054.3 |
Interest, net | (87.4) | (86.4) | (262.6) | (263.0) |
Other income (expense) | (1.9) | (14.0) | (7.8) | (22.4) |
Income taxes | (548.6) | (338.5) | (1,703.8) | (784.7) |
Equity earnings of affiliate | 1.3 | 3.1 | 14.4 | 1.0 |
Non-controlling interest | (3.6) | (2.1) | (10.6) | (4.9) |
Net income attributable to SCC | 867.6 | 506.0 | 2,564.2 | 980.3 |
Capital investment | 243.1 | 134.5 | 695.5 | 348.8 |
Property and mine development, net | 9,476.1 | 9,144.7 | 9,476.1 | 9,144.7 | $ 9,458.7
Total assets | 18,110.3 | 16,248.4 | 18,110.3 | 16,248.4 | $ 16,946.5
Intersegment sales |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | (42.8) | (29.7) | (107.9) | (78.0) |
Corporate, other and eliminations |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | (42.8) | (29.7) | (107.9) | (78.0) |
Cost of sales (exclusive of depreciation, amortization and depletion) | (48.4) | (28.2) | (122.5) | (88.2) |
Selling, general and administrative | 2.9 | 2.6 | 8.4 | 5.7 |
Depreciation, amortization and depletion | 9.4 | 8.9 | 28.4 | 28.2 |
Exploration | 5.9 | 2.8 | 11.2 | 7.0 |
Operating income | (12.6) | (15.8) | (33.4) | (30.7) |
Capital investment | 2.3 | 1.2 | 6.8 | 6.1 |
Property and mine development, net | 656.5 | 369.8 | 656.5 | 369.8 |
Total assets | 4,125.6 | 2,785.4 | 4,125.6 | 2,785.4 |
Reportable subsegments |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 2,680.9 | 2,129.1 | 8,110.4 | 5,634.2 |
Mexican Open-pit | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 1,425.8 | 1,181.7 | 4,536.6 | 3,152.1 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 433.4 | 491.0 | 1,441.6 | 1,482.4 |
Selling, general and administrative | 17.4 | 19.1 | 49.7 | 55.0 |
Depreciation, amortization and depletion | 97.8 | 91.0 | 289.0 | 276.0 |
Exploration | 0.6 | 0.4 | 1.8 | 1.9 |
Operating income | 876.6 | 580.2 | 2,754.5 | 1,336.8 |
Capital investment | 114.6 | 76.0 | 389.6 | 179.7 |
Property and mine development, net | 4,551.1 | 4,540.5 | 4,551.1 | 4,540.5 |
Total assets | 8,200.6 | 7,551.0 | 8,200.6 | 7,551.0 |
Mexican Open-pit | Reportable subsegments | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 1,425.8 | 1,181.7 | 4,536.6 | 3,152.1 |
Mexican IMMSA Unit | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 175.1 | 140.9 | 460.8 | 377.0 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 135.8 | 91.0 | 328.8 | 285.1 |
Selling, general and administrative | 2.9 | 2.6 | 7.8 | 6.8 |
Depreciation, amortization and depletion | 12.7 | 10.7 | 39.4 | 31.6 |
Exploration | 1.7 | 1.8 | 3.8 | 6.9 |
Operating income | 22.0 | 34.8 | 81.0 | 46.6 |
Capital investment | 29.0 | 16.0 | 61.5 | 55.7 |
Property and mine development, net | 555.5 | 508.1 | 555.5 | 508.1 |
Total assets | 1,009.9 | 879.7 | 1,009.9 | 879.7 |
Mexican IMMSA Unit | Intersegment sales |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 42.8 | 29.7 | 107.9 | 78.0 |
Mexican IMMSA Unit | Reportable subsegments | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 132.3 | 111.2 | 352.9 | 299.0 |
Peruvian Operations | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 1,122.8 | 836.2 | 3,220.9 | 2,183.1 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 406.7 | 395.1 | 1,208.9 | 1,202.0 |
Selling, general and administrative | 8.1 | 9.1 | 27.0 | 26.5 |
Depreciation, amortization and depletion | 83.5 | 85.4 | 242.6 | 247.0 |
Exploration | 2.7 | 1.9 | 9.9 | 6.0 |
Operating income | 621.8 | 344.7 | 1,732.5 | 701.6 |
Capital investment | 97.2 | 41.3 | 237.6 | 107.3 |
Property and mine development, net | 3,713.0 | 3,726.3 | 3,713.0 | 3,726.3 |
Total assets | 4,774.2 | 5,032.3 | 4,774.2 | 5,032.3 |
Peruvian Operations | Reportable subsegments | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | $ 1,122.8 | $ 836.2 | $ 3,220.9 | $ 2,183.1 |

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