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SEGMENT REPORTING (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2012
customer
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Dec. 31, 2011
customer
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Dec. 31, 2010
customer
|
|
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Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
|
Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Number of customers | 1 | 1 | 3 |
| Total revenue from customers that each individually accounted for more than 10 percent of consolidated product revenues | $ 923.7 | $ 1,400.0 | $ 1,800.0 |
|
U.S. Iron Ore [Member]
|
Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Number of mines (in number of facilities) | 5 | Ìý | Ìý |
|
Eastern Canadian Iron Ore [Member]
|
Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Number of mines (in number of facilities) | 2 | Ìý | Ìý |
|
North American Coal [Member] | Metallurgical Coal Mines [Member]
|
Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Number of mines (in number of facilities) | 6 | Ìý | Ìý |
|
North American Coal [Member] | Thermal Coal Mines [Member]
|
Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Number of mines (in number of facilities) | 1 | Ìý | Ìý |
|
Latin American Iron Ore [Member] | Amapa [Member]
|
Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Interest Percentage | 30.00% | Ìý | Ìý |
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Sonoma [Member] | Asia Pacific Coal [Member]
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Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Ownership interest, percent | 45.00% | Ìý | Ìý |
| X | ||||||||||
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- Definition
Number of Customers No definition available.
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- Definition
Number of mines No definition available.
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- Definition
The percentage of ownership of common stock or equity participation in the investee. No definition available.
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- Definition
Amount of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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