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SUPPLEMENTAL CASH FLOW INFORMATION (Tables)
 12 Months Ended
Dec. 31, 2019
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)
2019
 
2018
 
2017
Current assets
$
(5
)
 
$
(47
)
 
$
13

Other assets
15

 
43

 
29

Current liabilities
(82
)
 
(38
)
 
59

Long-term liabilities and equity
(17
)
 
87

 
43

Total
$
(89
)
 
$
45

 
$
144
Schedule of Cash Paid for Interest and Income Taxes and Noncash Investing and Financing Activities
 
For years ended December 31,
(Dollars in millions)
2019
 
2018
 
2017
 
 
 
 
 
 
Interest, net of amounts capitalized
$
235

 
$
239

 
$
263

Income taxes
217

 
202

 
97

Non-cash investing and financing activities:
 
 
 
 
 
Outstanding trade payables related to capital expenditures
22

 
18

 
27

(Gain) loss from equity investments
(10
)
 
(17
)
 
(14
)