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Environmental And Mine Closure Obligations (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2012
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Dec. 31, 2011
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Mar. 31, 2012
LTV Steel Mining Company [Member]
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Mar. 31, 2012
U.S. Iron Ore [Member]
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Mar. 31, 2012
Eastern Canadian Iron Ore [Member]
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Mar. 31, 2012
North American Coal [Member]
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Mar. 31, 2012
Asia Pacific Iron Ore [Member]
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Mar. 31, 2012
Sonoma [Member]
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| Loss Contingencies [Line Items] | ||||||||
| Total environmental and mine closure obligations | $ 240.7 | $ 235.7 | ||||||
| Mine closure obligations, number of mines | 1 | 4 | 2 | 6 | 1 | 1 | ||
| X | ||||||||||
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- Definition
Environmental Loss Contingency And Mine Reclamation And Closing Liability Current And Noncurrent No definition available.
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| X | ||||||||||
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- Definition
Mine closure obligations, number of mines No definition available.
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| X | ||||||||||
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- Details
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