INVENTORIES (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Inventory [Line Items] | 听 | 听 |
| Cost of Goods Sold | $ (0.2) | 听 |
| Increase in Inventories | 听 | 6.2 |
| Mining and Pelletizing [Member] | 听 | 听 |
| Inventory [Line Items] | 听 | 听 |
| Inventory, LIFO Reserve | $ 95.6 | $ 96.2 |
| X | ||||||||||
- Definition Effect of inventory reduction No definition available.
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| X | ||||||||||
- 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://fasb.org/us-gaap/role/ref/legacyRef
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| 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.
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| X | ||||||||||
- Definition Additional information disclosed related to LIFO (last in first out) inventory. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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