PROPERTY, PLANT AND EQUIPMENT (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Property, Plant and Equipment [Line Items] | Ìý | Ìý | Ìý |
| Depletion | $ 7.4 | $ 79.6 | $ 84.9 |
| Depreciation | $ 119.2 | 173.0 | $ 191.5 |
| Tangible Asset Impairment Charges | Ìý | 537.8 | Ìý |
| Land Rights And Mineral Rights [Member] | Ìý | Ìý | Ìý |
| Property, Plant and Equipment [Line Items] | Ìý | Ìý | Ìý |
| Tangible Asset Impairment Charges | Ìý | $ 297.2 | Ìý |
| X | ||||||||||
- Definition The noncash expense charged against earnings to recognize the consumption of natural resources. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|