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SEGMENT AND RELATED INFORMATION: - Receivables (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Financial information related to segments |  |  |
Trade receivables | $ 1,068.9 | $ 832.9 | $ 822.4
Related parties receivable current: | 23.3 | 30.0 | 101.5
Related parties receivable non-current: |  | 59.5 |
Corporate, other and eliminations |  |  |
Financial information related to segments |  |  |
Related parties receivable current: | 7.1 | 7.9 | 19.9
Mexican Open-pit |  |  |
Financial information related to segments |  |  |
Trade receivables | 566.0 | 477.8 | 505.9
Related parties receivable current: | 15.4 | 22.1 | 81.6
Related parties receivable non-current: |  | 59.5 |
Mexican IMMSA Unit |  |  |
Financial information related to segments |  |  |
Trade receivables | 57.8 | 38.0 | 50.5
Peruvian Operations |  |  |
Financial information related to segments |  |  |
Trade receivables | 445.1 | $ 317.1 | $ 266.0
Related parties receivable current: | $ 0.8 |  |

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