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REVENUE: - Receivables by reporting segment (Details) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 USD ($) T | Dec. 31, 2019 USD ($)
Opening and closing balances of receivables |  |
Trade receivables | $ 709.7 | $ 832.9
Related parties, current | 35.3 | 30.0
Related parties, non-current | 59.0 | 59.5
Corporate, other and eliminations |  |
Opening and closing balances of receivables |  |
Related parties, current | $ 7.9 | 7.9
Copper concentrates |  |
Long Term Contracts |  |
Long term contracts | T | 870,000 |
Copper cathodes |  |
Long Term Contracts |  |
Long term contracts | T | 48,000 |
Molybdenum concentrates |  |
Long Term Contracts |  |
Long term contracts | T | 24,061 |
Sulfuric acid |  |
Long Term Contracts |  |
Long term contracts | T | 292,400 |
Mexican Open-pit | Operating segment |  |
Opening and closing balances of receivables |  |
Trade receivables | $ 411.1 | 477.8
Related parties, current | 27.4 | 22.1
Related parties, non-current | 59.0 | 59.5
Mexican IMMSA Unit | Operating segment |  |
Opening and closing balances of receivables |  |
Trade receivables | 44.4 | 38.0
Peruvian Operations | Operating segment |  |
Opening and closing balances of receivables |  |
Trade receivables | $ 254.2 | $ 317.1

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