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ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS (Tables)
 12 Months Ended
Dec. 31, 2014
Environmental Remediation Obligations [Abstract]  
Summary Of Mine Closure Obligations
The following is a summary of the obligations as of December 31, 2014 and 2013:
 
(In Millions)
 
December 31,
 
2014
 
2013
Environmental
$
5.5

 
$
8.4

Mine closure
 
 
 
LTVSMC
22.9

 
22.0

Operating mines:
 
 
 
U.S. Iron Ore
120.9

 
152.2

Asia Pacific Iron Ore
21.5

 
25.5

North American Coal
33.9

 
34.7

Eastern Canadian Iron Ore
56.5

 
78.2

Total mine closure
255.7

 
312.6

Total environmental and mine closure obligations
261.2

 
321.0

Less current portion
5.2

 
11.3

Long-term environmental and mine closure obligations
$
256.0

 
$
309.7
Asset Retirement Obligation Disclosure
The following represents a roll forward of our asset retirement obligation liability related to our active mining locations for the years ended December 31, 2014 and 2013:
 
(In Millions)
 
December 31,
 
2014
 
2013
Asset retirement obligation at beginning of period
$
290.6

 
$
231.1

Accretion expense
14.5

 
18.1

Exchange rate changes
(2.4
)
 
(3.4
)
Revision in estimated cash flows
(65.2
)
 
44.8

Disposal of CLCC Assets
(4.7
)
 
$
—

Asset retirement obligation at end of period
$
232.8

 
$
290.6