|
Segment Reporting (Narrative) (Detail)
|
9 Months Ended |
|---|---|
|
Sep. 30, 2012
Facility
|
|
|
U.S. Iron Ore [Member]
|
Ìý |
| Segment Reporting Information [Line Items] | Ìý |
| Number of mines (in number of facilities) | 5 |
|
Eastern Canadian Iron Ore [Member]
|
Ìý |
| Segment Reporting Information [Line Items] | Ìý |
| Number of mines (in number of facilities) | 2 |
|
Asia Pacific Coal [Member] | Sonoma [Member]
|
Ìý |
| Segment Reporting Information [Line Items] | Ìý |
| Ownership interest, percent | 45.00% |
|
Latin American Iron Ore [Member] | Amapa [Member]
|
Ìý |
| Segment Reporting Information [Line Items] | Ìý |
| Percent ownership interest | 30.00% |
|
Metallurgical Coal Mines [Member] | North American Coal [Member]
|
Ìý |
| Segment Reporting Information [Line Items] | Ìý |
| Number of mines (in number of facilities) | 5 |
|
Thermal Coal Mines [Member] | North American Coal [Member]
|
Ìý |
| Segment Reporting Information [Line Items] | Ìý |
| Number of mines (in number of facilities) | 1 |
| X | ||||||||||
|
- Definition
Number of mines No definition available.
|
| X | ||||||||||
|
- Definition
The percentage of ownership of common stock or equity participation in the investee. No definition available.
|
| X | ||||||||||
|
- 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
|
| X | ||||||||||
|
- Details
|