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SUPPLEMENTAL CASH FLOW INFORMATION (Tables)
 12 Months Ended
Dec. 31, 2018
Supplemental Cash Flow Information [Abstract]  
Schedule of Cash Flow Supplemental Disclosures Other Items
Included in the line item "Other items, net" of the "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)
2018
 
2017
 
2016
Current assets
$
(47
)
 
$
13

 
$
(35
)
Other assets
43

 
29

 
37

Current liabilities
(38
)
 
59

 
(98
)
Long-term liabilities and equity
87

 
43

 
(29
)
Total
$
45

 
$
144

 
$
(125
)
Schedule of Cash Paid for Interest and Income Taxes and Noncash Investing and Financing Activities
 
For years ended December 31,
(Dollars in millions)
2018
 
2017
 
2016
 
 
 
 
 
 
Interest, net of amounts capitalized
$
239

 
$
263

 
$
280

Income taxes
202

 
97

 
120

Non-cash investing and financing activities:
 
 
 
 
 
Outstanding trade payables related to capital expenditures
18

 
27

 
34

(Gain) loss from equity investments
(17
)
 
(14
)
 
(15
)