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PROVISIONALLY PRICED SALES: (Details) lb in Millions, $ in Millions | 9 Months Ended
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Sep. 30, 2015 USD ($) lb $ / item
In October 2015 |
PROVISIONALLY PRICED SALES: |
Reduction of sales as effect of market price | $ 1.9
Copper | October 2015 to December 2015 |
PROVISIONALLY PRICED SALES: |
Nonmonetary notional amount of commodity (in million lbs.) | lb | 80.7
Provisional price | $ / item | 2.35
Molybdenum | October 2015 to January 2016 |
PROVISIONALLY PRICED SALES: |
Nonmonetary notional amount of commodity (in million lbs.) | lb | 12.0
Provisional price | $ / item | 5.40
Copper And Molybdenum | After October 2015 |
PROVISIONALLY PRICED SALES: |
Reduction in sales as effect of forward price | $ 5.4

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