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Quarterly report pursuant to Section 13 or 15(d)

INVENTORIES (Schedule Of Inventories) (Details)

v3.2.0.727
INVENTORIES (Schedule Of Inventories) (Details) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Inventory, Net [Abstract] Ìý Ìý
Finished Goods $ 397.9 $ 158.5
Work-in Process 89.2 101.6
Total Inventory 487.1 260.1
U.S. Iron Ore [Member] Ìý Ìý
Inventory, Net [Abstract] Ìý Ìý
Finished Goods 377.2 132.1
Work-in Process 22.9 13.5
Total Inventory 400.1 145.6
Asia Pacific Iron Ore [Member] Ìý Ìý
Inventory [Line Items] Ìý Ìý
Other Inventory, Noncurrent 20.8 0.0
Inventory, Net [Abstract] Ìý Ìý
Finished Goods 20.7 26.4
Work-in Process 66.3 88.1
Total Inventory $ 87.0 $ 114.5