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SUPPLEMENTAL CASH FLOW INFORMATION (Tables)
 3 Months Ended
Mar. 31, 2019
Supplemental Cash Flow Information [Abstract]  
Schedule of Cash Flow, Supplemental Disclosures Included in the line item "Other items, net" of the "Operating activities" section of the Unaudited Consolidated Statements of Cash Flows are the following changes to Unaudited Consolidated Statements of Financial Position:
(Dollars in millions)
First Three Months
 
2019
 
2018
Other current assets
$
2

 
$
(29
)
Other noncurrent assets
6

 
14

Payables and other current liabilities
59

 
(14
)
Long-term liabilities and equity
(14
)
 
(1
)
Total
$
53

 
$
(30
)