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Quarterly report pursuant to Section 13 or 15(d)

Segment Reporting (Narrative) (Details)

v2.3.0.15
Segment Reporting (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2011
Segment Reporting Information, Intersegment Revenue $ 0
Amapa [Member] | Latin American Iron Ore [Member]
Ìý
Percent ownership interest 30.00%
Sonoma [Member] | Asia Pacific Coal [Member]
Ìý
Percent ownership interest 45.00%
RenewaFUEL [Member] | Alternative Energies [Member]
Ìý
Percent ownership interest 95.00%
U.S. Iron Ore [Member]
Ìý
Number of Mines in Operation 5
Eastern Canadian Iron Ore [Member]
Ìý
Number of Mines in Operation 2
Asia Pacific Iron Ore [Member]
Ìý
Number of Mines in Operation 2
North American Coal [Member]
Ìý
Number of Mines in Operation 5
Thermal Coal [Member]
Ìý
Number of Mines in Operation 1