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Quarterly report pursuant to Section 13 or 15(d)

INVENTORIES (Narrative) (Details)

v2.4.0.8
INVENTORIES (Narrative) (Details) (Cost of Sales [Member], USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Eastern Canadian Iron Ore [Member]
 听 听 听 听
Inventory [Line Items] 听 听 听 听
Inventory Write-down $ 2.6 听 $ 16.0 听
North American Coal [Member]
 听 听 听 听
Inventory [Line Items] 听 听 听 听
Inventory Write-down 15.0 0.7 37.1 2.7
Pellets [Member] | Wabush [Member]
 听 听 听 听
Inventory [Line Items] 听 听 听 听
Inventory Write-down 听 听 听 11.1
Unsaleable Inventory Impairment Charge 听 听 听 10.6
Sinter feed [Member] | Eastern Canadian Iron Ore [Member]
 听 听 听 听
Inventory [Line Items] 听 听 听 听
Inventory Write-down 听 听 听 $ 4.7