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Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND OTHER INTANGIBLE ASSETS AND LIABILITIES (Schedule Of Goodwill) (Details)

v2.4.0.8
GOODWILL AND OTHER INTANGIBLE ASSETS AND LIABILITIES (Schedule Of Goodwill) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Goodwill [Roll Forward] Ìý Ìý
Beginning Balance $ 74.5 $ 167.4
Arising in business combinations 0 0
Impairment 0 (80.9)
Impact of foreign currency translation 2.8 (12.0)
Ending Balance 77.3 74.5
Accumulated goodwill impairment loss (1,108.7) (1,108.7)
U.S. Iron Ore [Member]
 Ìý Ìý
Goodwill [Roll Forward] Ìý Ìý
Beginning Balance 2.0 2.0
Arising in business combinations 0 0
Impairment 0 0
Impact of foreign currency translation 0 0
Ending Balance 2.0 2.0
Accumulated goodwill impairment loss 0 0
Eastern Canadian Iron Ore [Member]
 Ìý Ìý
Goodwill [Roll Forward] Ìý Ìý
Beginning Balance 0 0
Arising in business combinations 0 0
Impairment 0 0
Impact of foreign currency translation 0 0
Ending Balance 0 0
Accumulated goodwill impairment loss (1,000.0) (1,000.0)
Asia Pacific Iron Ore [Member]
 Ìý Ìý
Goodwill [Roll Forward] Ìý Ìý
Beginning Balance 72.5 84.5
Arising in business combinations 0 0
Impairment 0 0
Impact of foreign currency translation 2.8 (12.0)
Ending Balance 75.3 72.5
Accumulated goodwill impairment loss 0 0
North American Coal [Member]
 Ìý Ìý
Goodwill [Roll Forward] Ìý Ìý
Beginning Balance 0 0
Arising in business combinations 0 0
Impairment 0 0
Impact of foreign currency translation 0 0
Ending Balance 0 0
Accumulated goodwill impairment loss (27.8) (27.8)
Other Segment [Member]
 Ìý Ìý
Goodwill [Roll Forward] Ìý Ìý
Beginning Balance 0 80.9
Arising in business combinations 0 0
Impairment 0 (80.9)
Impact of foreign currency translation 0 0
Ending Balance 0 0
Accumulated goodwill impairment loss $ (80.9) $ (80.9)