Quarterly report pursuant to Section 13 or 15(d)

SEGMENT REPORTING (Narrative) (Details)

v2.4.0.8
SEGMENT REPORTING (Narrative) (Details)
9 Months Ended
Sep. 30, 2014
Facility
U.S. Iron Ore [Member]
 
Segment Reporting Information [Line Items]  
Number of mines (in number of facilities) 5
Eastern Canadian Iron Ore [Member]
 
Segment Reporting Information [Line Items]  
Number of mines (in number of facilities) 2
Asia Pacific Iron Ore [Member]
 
Segment Reporting Information [Line Items]  
Number of mines (in number of facilities) 1
Metallurgical Coal Mines [Member] | North American Coal [Member]
 
Segment Reporting Information [Line Items]  
Number of mines (in number of facilities) 4
Thermal Coal Mines [Member] | North American Coal [Member]
 
Segment Reporting Information [Line Items]  
Number of mines (in number of facilities) 1