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Contingent Liabilities (Tables)
 6 Months Ended
Jun. 30, 2019
Loss Contingency [Abstract]  
Schedule of change in balance sheet position of product related liabilities
The table below summarizes the change in product related liabilities in the Condensed Consolidated Balance Sheets.
 
Three Months Ended June 30
 
Six Months Ended June 30
(Dollars in millions)
2019
 
2018
 
2019
 
2018
Reserve at beginning of the period
$
14

 
$
23

 
$
16

 
$
22

Change in reserve
2

 
1

 
1

 
8

Cash payments
(1
)
 
(1
)
 
(3
)
 
(7
)
Reserve at end of the period
$
14

 
$
23

 
$
14

 
$
23