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REVENUE: - Revenue by Geographical Areas (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Revenue Recognition |  |
Net sales | $ 1,753.4 | $ 1,841.1
Corporate, other and eliminations |  |
Revenue Recognition |  |
Net sales | (19.9) | (19.6)
Mexican Open-pit | Operating segment |  |
Revenue Recognition |  |
Net sales | 1,072.1 | 1,068.6
Mexican IMMSA Unit | Operating segment |  |
Revenue Recognition |  |
Net sales | 121.1 | 149.2
Peruvian Operations | Operating segment |  |
Revenue Recognition |  |
Net sales | 580.1 | 642.9
Mexico |  |
Revenue Recognition |  |
Net sales | 418.2 | 460.5
Mexico | Corporate, other and eliminations |  |
Revenue Recognition |  |
Net sales | (19.9) | (19.6)
Mexico | Mexican Open-pit | Operating segment |  |
Revenue Recognition |  |
Net sales | 351.3 | 368.8
Mexico | Mexican IMMSA Unit | Operating segment |  |
Revenue Recognition |  |
Net sales | 86.8 | 111.3
United States |  |
Revenue Recognition |  |
Net sales | 287.1 | 294.9
United States | Mexican Open-pit | Operating segment |  |
Revenue Recognition |  |
Net sales | 279.0 | 248.4
United States | Mexican IMMSA Unit | Operating segment |  |
Revenue Recognition |  |
Net sales | 1.4 | 5.0
United States | Peruvian Operations | Operating segment |  |
Revenue Recognition |  |
Net sales | 6.7 | 41.5
Peru |  |
Revenue Recognition |  |
Net sales | 87.3 | 93.5
Peru | Mexican Open-pit | Operating segment |  |
Revenue Recognition |  |
Net sales | 1.6 |
Peru | Peruvian Operations | Operating segment |  |
Revenue Recognition |  |
Net sales | 85.7 | 93.5
Brazil |  |
Revenue Recognition |  |
Net sales | 55.5 | 75.5
Brazil | Mexican IMMSA Unit | Operating segment |  |
Revenue Recognition |  |
Net sales | 7.2 | 12.6
Brazil | Peruvian Operations | Operating segment |  |
Revenue Recognition |  |
Net sales | 48.3 | 62.9
Chile |  |
Revenue Recognition |  |
Net sales | 21.1 | 36.0
Chile | Mexican Open-pit | Operating segment |  |
Revenue Recognition |  |
Net sales | 1.1 |
Chile | Peruvian Operations | Operating segment |  |
Revenue Recognition |  |
Net sales | 20.0 | 36.0
Other American countries |  |
Revenue Recognition |  |
Net sales | 15.1 | 14.4
Other American countries | Mexican Open-pit | Operating segment |  |
Revenue Recognition |  |
Net sales | 12.8 | 12.6
Other American countries | Mexican IMMSA Unit | Operating segment |  |
Revenue Recognition |  |
Net sales | 0.5 | 0.8
Other American countries | Peruvian Operations | Operating segment |  |
Revenue Recognition |  |
Net sales | 1.8 | 1.0
Switzerland |  |
Revenue Recognition |  |
Net sales | 347.8 | 135.3
Switzerland | Mexican Open-pit | Operating segment |  |
Revenue Recognition |  |
Net sales | 225.4 | 82.3
Switzerland | Mexican IMMSA Unit | Operating segment |  |
Revenue Recognition |  |
Net sales | 12.0 | 9.2
Switzerland | Peruvian Operations | Operating segment |  |
Revenue Recognition |  |
Net sales | 110.4 | 43.8
Italy |  |
Revenue Recognition |  |
Net sales | 82.0 | 96.0
Italy | Mexican Open-pit | Operating segment |  |
Revenue Recognition |  |
Net sales | 29.2 | 8.3
Italy | Mexican IMMSA Unit | Operating segment |  |
Revenue Recognition |  |
Net sales | 5.5 | 5.5
Italy | Peruvian Operations | Operating segment |  |
Revenue Recognition |  |
Net sales | 47.3 | 82.2
Spain |  |
Revenue Recognition |  |
Net sales | 45.5 | 44.5
Spain | Mexican Open-pit | Operating segment |  |
Revenue Recognition |  |
Net sales | 45.5 | 44.5
Other European Countries |  |
Revenue Recognition |  |
Net sales | 82.6 | 82.1
Other European Countries | Mexican Open-pit | Operating segment |  |
Revenue Recognition |  |
Net sales | 22.9 | 51.8
Other European Countries | Mexican IMMSA Unit | Operating segment |  |
Revenue Recognition |  |
Net sales | 5.8 | 4.6
Other European Countries | Peruvian Operations | Operating segment |  |
Revenue Recognition |  |
Net sales | 53.9 | 25.7
Singapore |  |
Revenue Recognition |  |
Net sales | 112.9 | 276.4
Singapore | Mexican Open-pit | Operating segment |  |
Revenue Recognition |  |
Net sales | 58.5 | 143.9
Singapore | Mexican IMMSA Unit | Operating segment |  |
Revenue Recognition |  |
Net sales | 1.8 |
Singapore | Peruvian Operations | Operating segment |  |
Revenue Recognition |  |
Net sales | 52.6 | 132.5
Japan |  |
Revenue Recognition |  |
Net sales | 127.3 | 159.4
Japan | Mexican Open-pit | Operating segment |  |
Revenue Recognition |  |
Net sales | 9.8 | 44.2
Japan | Peruvian Operations | Operating segment |  |
Revenue Recognition |  |
Net sales | 117.5 | 115.2
Other Asian countries |  |
Revenue Recognition |  |
Net sales | 71.0 | 72.6
Other Asian countries | Mexican Open-pit | Operating segment |  |
Revenue Recognition |  |
Net sales | 35.0 | 63.8
Other Asian countries | Mexican IMMSA Unit | Operating segment |  |
Revenue Recognition |  |
Net sales | 0.1 | 0.2
Other Asian countries | Peruvian Operations | Operating segment |  |
Revenue Recognition |  |
Net sales | $ 35.9 | $ 8.6

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