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SUPPLEMENTAL CASH FLOW INFORMATION (Tables)
 12 Months Ended
Dec. 31, 2015
Supplemental Cash Flow Information [Abstract]  
Schedule of Cash Flow Supplemental Disclosures Other Items
Included in the line item "Other items, net" of the "Cash flows from operating activities" section of the Consolidated Statements of Cash Flows are specific changes to certain balance sheet accounts as follows:
 
For years ended December 31,
(Dollars in millions)
2015
 
2014
 
2013
Current assets
$
5

 
$
(12
)
 
$
(56
)
Other assets
44

 
45

 
102

Current liabilities
22

 
(88
)
 
(26
)
Long-term liabilities
(11
)
 
16

 
(191
)
Total
$
60

 
$
(39
)
 
$
(171
)
Schedule of Cash Paid for Interest and Income Taxes and Noncash Investing and Financing Activities
 
For years ended December 31,
(Dollars in millions)
2015
 
2014
 
2013
Cash paid for interest and income taxes is as follows:
 
 
 
 
 
Interest, net of amounts capitalized
$
265

 
$
184

 
$
186

Income taxes
124

 
152

 
224

Non-cash investing and financing activities:
 
 
 
 
 
Outstanding trade payables related to capital expenditures
10

 
19

 
28

(Gain) loss from equity investments
(15
)
 
(13
)
 
(4
)