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WORKERS' PARTICIPATION: (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Statutory workers' participation |  |  |
Current | $ 201.6 | $ 263.1 | $ 274.7
Deferred | 31.4 | 14.3 | (18.0)
Workers' participation expense (in USD) | 233.0 | 277.4 | 256.7
Peru |  |  |
Statutory workers' participation |  |  |
Provision for workers' participation as a percentage of pre-tax earnings | 8.00% |  |
Number of months for which an individual worker's salary is capped for consideration of annual individual worker participation | 18 months |  |
Maximum taxable units contributed by employer to benefit fund (in Peruvian taxable units) | 2,200 |  |
Maximum employer contribution to benefit fund (in USD) | 2.9 |  |
Mexican Operations |  |  |
Statutory workers' participation |  |  |
Provision for workers' participation as a percentage of pre-tax earnings | 10.00% |  |
Deferred workers participation provision | $ 16.3 |  |

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- Details
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- Definition Represents the maximum employer contribution to benefit fund. + References No definition available. + Details
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- Definition Represents the maximum taxable units contributed by employer to benefit fund. + References No definition available. + Details
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- Definition Represents the number of periods for which an individual worker's salary is capped for determining the maximum annual amount payable as worker's participation to each individual worker. + References No definition available. + Details
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- Definition Represents the provision for workers' participation. + References No definition available. + Details
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- Definition Represents the provision for workers' participation as a percentage of pre-tax earnings. + References No definition available. + Details
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- Definition Represents the workers' participation expenses incurred by the entity during the period. + References No definition available. + Details
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- Definition Represents the current workers' participation expenses incurred by the entity during the period. + References No definition available. + Details
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- Definition Represents the deferred workers' participation expenses incurred by the entity during the period. + References No definition available. + Details
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