INVENTORIES (Narrative) (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Inventory [Line Items] | Ìý | Ìý |
| Cost of Goods Sold | $ 8,800,000 | Ìý |
| Asia Pacific Iron Ore [Member] | Ìý | Ìý |
| Inventory [Line Items] | Ìý | Ìý |
| Other Inventory, Noncurrent | 0 | $ 6,800,000 |
| U.S. Iron Ore [Member] | Ìý | Ìý |
| Inventory [Line Items] | Ìý | Ìý |
| Inventory, LIFO Reserve | $ 78,500,000 | 87,800,000 |
| Increase in Inventories due to build up of LIFO layers | Ìý | $ 118,800,000 |
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- Definition Effect of inventory reduction No definition available.
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- Definition Increase in Inventories due to build up of LIFO layers No definition available.
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- Definition Amount by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at other inventory cost methods. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- 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.
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- Definition Carrying amount as of the balance sheet date of inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle (such as inventory related to long-term contracts or program rights). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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