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ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2014
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Dec. 31, 2013
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| Environmental Remediation Obligations [Abstract] | ||
| Total environmental and mine closure obligations | $ 306.3 | $ 321.0 |
| X | ||||||||||
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- Definition
Environmental Loss Contingency And Mine Reclamation And Closing Liability Current And Noncurrent No definition available.
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| X | ||||||||||
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- Details
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