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INCOME TAXES: (Details 3) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2009 AMC Minimum
--- | --- | --- | ---
Assets: |  |  |
Inventories | $ 18.7 | $ 23.6 |
Capitalized exploration expenses | 29.4 | 24.4 |
U.S. foreign tax credit carryforward | 280.0 | 202.3 |
U.S tax effect of Peruvian deferred tax liability | 68.0 | 33.4 |
Reserves | 35.0 | 77.5 |
Mexican tax loss carryforward |  | 26.9 |
Labor share buyback |  | 30.0 |
Other | 27.9 | 32.6 |
Total deferred tax assets | 459.0 | 450.7 |
Liabilities: |  |  |
Property, plant and equipment | (105.8) | (125.0) |
Deferred charges | (79.6) | (81.6) |
Mexican tax on consolidated dividends | (31.5) | (34.6) |
Outside basis difference | (7.4) | (41.3) |
Other | (0.1) | (0.5) |
Total deferred tax liabilities | (224.4) | (283.0) |
Total net deferred tax assets / (liabilities) | 234.6 | 167.7 |
Amount of capital loss carryover which was utilized |  | 0.9 |
Amount of capital loss carryover which was expired |  | 1.3 |
Other U.S. tax credits | $ 0 |  |
Related party transactions |  |  |
Percentage of ownership interest held by the parent company | 82.30% | 81.30% | 80.00%

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