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v3.20.4

INCOME TAXES: - Tax assets and liabilities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Assets: |  |  |  |
Inventories | $ 62.4 | $ 55.7 |  |
Capitalized exploration expenses | 13.0 | 14.0 |  |
U.S. foreign tax credit carryforward, net of FIN 48 liability | 974.1 | 731.8 |  |
U.S. tax effect of Peruvian deferred tax liability | 111.2 | 131.3 |  |
Provisions | 169.5 | 145.0 |  |
Mexican tax on consolidated dividends |  | 9.0 |  |
Deferred workers participation | 37.8 | 24.7 |  |
Accrued salaries, wages and vacations | 8.5 | 10.0 |  |
Sales price adjustment (PUI) | (5.8) | 3.0 |  |
Social responsibility expenses | 4.3 | 2.1 |  |
Deferred charges | 41.8 | 14.5 |  |
Valuation allowance on U.S. deferred tax assets, foreign tax credits and U.S. tax effect on Peruvian deferred | (1,343.2) | (1,097.0) |  |
Other | 19.5 | 9.9 |  |
Total deferred tax assets | 93.1 | 54.0 |  |
Liabilities: |  |  |  |
Property, plant and equipment | (17.2) | (45.4) |  |
Other | (5.3) | (3.0) |  |
Total deferred tax liabilities | (22.5) | (48.4) |  |
Total net deferred tax assets | 70.6 | $ 5.6 |  |
Increase in valuation allowance | $ 246.2 |  |  |
U.S. statutory rate (as a percent) | 21.00% | 21.00% | 21.00% | 35.00%

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