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ASSETS IMPAIRMENTS AND RESTRUCTURING CHARGES, NET (Tables)
 9 Months Ended
Sep. 30, 2015
Restructuring Costs and Asset Impairment Charges [Abstract]  
Changes to restructuring reserve and related activities
The following table summarizes the changes in asset impairments and restructuring charges and gains, the non-cash reductions attributable to asset impairments, and the cash reductions in restructuring reserves for severance costs and site closure costs paid in first nine months 2015 and full year 2014:

(Dollars in millions)
Balance at January 1, 2015
 
Provision/ Adjustments
 
Non-cash Reductions
 
Cash Reductions
 
Balance at September 30, 2015
Non-cash charges
$
—

 
$
107

 
$
(107
)
 
$
—

 
$
—

Severance costs
13

 
15

 
2

 
(22
)
 
8

Site closure and restructuring costs
15

 
8

 
2

 
(13
)
 
12

Total
$
28

 
$
130

 
$
(103
)
 
$
(35
)
 
$
20



(Dollars in millions)
Balance at January 1, 2014
 
Provision/ Adjustments
 
Non-cash Reductions
 
Cash Reductions
 
Balance at December 31, 2014
Non-cash charges
$
—

 
$
52

 
$
(52
)
 
$
—

 
$
—

Severance costs
22

 
13

 
—

 
(22
)
 
13

Site closure and restructuring costs
14

 
12

 
(4
)
 
(7
)
 
15

Total
$
36

 
$
77

 
$
(56
)
 
$
(29
)
 
$
28