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Contingent Liabilities (Tables)
 9 Months Ended
Sep. 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 September 30
 
Nine Months Ended September 30
(Dollars in millions)
2019
 
2018
 
2019
 
2018
Reserve at beginning of the period
$
14

 
$
23

 
$
16

 
$
22

Change in reserve
—

 
1

 
1

 
10

Cash payments
—

 
—

 
(3
)
 
(8
)
Reserve at end of the period
$
14

 
$
24

 
$
14

 
$
24