Cleveland-Cliffs Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

INVENTORIES (Schedule Of Inventories) (Details)

INVENTORIES (Schedule Of Inventories) (Details) (USD $) In Millions, unless otherwise specified											3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 U.S. Iron Ore [Member]	Dec. 31, 2012 U.S. Iron Ore [Member]	Mar. 31, 2013 Eastern Canadian Iron Ore [Member]	Dec. 31, 2012 Eastern Canadian Iron Ore [Member]	Mar. 31, 2013 Asia Pacific Iron Ore [Member]	Dec. 31, 2012 Asia Pacific Iron Ore [Member]	Mar. 31, 2013 North American Coal [Member]	Dec. 31, 2012 North American Coal [Member]	Mar. 31, 2013 Cost Of Goods Sold And Operating Expenses [Member] North American Coal [Member]	Mar. 31, 2012 Cost Of Goods Sold And Operating Expenses [Member] North American Coal [Member]
Inventory, Net [Abstract]
Finished Goods	$ 517.9	$ 283.2	$ 293.9	$ 147.2	$ 101.0	$ 62.6	$ 73.5	$ 36.7	$ 49.5	$ 36.7
Work-in Process	112.2	153.3	27.2	22.9	38.4	44.2	16.4	37.2	30.2	49.0
Total Inventory	630.1	436.5	321.1	170.1	139.4	106.8	89.9	73.9	79.7	85.7
Lower-of-cost-or-market inventory charges											$ 2.0	$ 1.3

- Definition

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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- Definition

Charge to cost of goods sold that represents the reduction of the carrying amount of inventory, generally attributable to obsolescence or market conditions.

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