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%

Represents the amount as of the balance sheet date of the estimated future tax effects attributable to the difference between the methods used to account for capitalized exploration expenses for tax purposes and under generally accepted accounting principles.

No definition available.