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ASSET IMPAIRMENTS AND RESTRUCTURING (Tables)
 12 Months Ended
Dec. 31, 2017
Restructuring Costs and Asset Impairment Charges [Abstract]  
Schedule of Restructuring and Related Charges
 
For years ended December 31,
(Dollars in millions)
2017
 
2016
 
2015
Asset impairments
$
1

 
$
12

 
$
85

Gain on sale of assets, net
—

 
(2
)
 
(1
)
Intangible asset and goodwill impairments
—

 
—

 
22

Severance charges
6

 
32

 
68

Site closure and restructuring charges
1

 
3

 
9

Total
$
8

 
$
45

 
$
183
Schedule of Changes to Restructuring Reserve and Related Activities
 
Balance at
January 1,
2017
 
Provision/ Adjustments
 
Non-cash Reductions/ Additions
 
Cash
Reductions
 
Balance at
December 31,
2017
Noncash charges
$
—

 
$
1

 
$
(1
)
 
$
—

 
$
—

Severance costs
42

 
6

 
—

 
(29
)
 
19

Site closure & restructuring costs
13

 
1

 
1

 
(5
)
 
10

Total
$
55

 
$
8

 
$
—

 
$
(34
)
 
$
29

 
Balance at
January 1,
2016
 
Provision/ Adjustments
 
Non-cash Reductions/ Additions
 
Cash
Reductions
 
Balance at
December 31,
2016
Noncash charges
$
—

 
$
12

 
$
(12
)
 
$
—

 
$
—

Severance costs
55

 
32

 
—

 
(45
)
 
42

Site closure & restructuring costs
11

 
1

 
4

 
(3
)
 
13

Total
$
66

 
$
45

 
$
(8
)
 
$
(48
)
 
$
55

 
Balance at
January 1,
2015
 
Provision/ Adjustments
 
Non-cash Reductions/ Additions
 
Cash
Reductions
 
Balance at
December 31,
2015
Noncash charges
$
—

 
$
107

 
$
(107
)
 
$
—

 
$
—

Severance costs
13

 
67

 
1

 
(26
)
 
55

Site closure & restructuring costs
15

 
9

 
3

 
(16
)
 
11

Total
$
28

 
$
183

 
$
(103
)
 
$
(42
)
 
$
66