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Annual report pursuant to Section 13 and 15(d)

INVENTORIES (Narrative) (Details)

v3.10.0.1
INVENTORIES (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Inventory [Line Items] Ìý Ìý
Cost of Goods Sold $ (0.2) Ìý
Increase in Inventories Ìý 6.2
Mining and Pelletizing [Member] Ìý Ìý
Inventory [Line Items] Ìý Ìý
Inventory, LIFO Reserve $ 95.6 $ 96.2