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PRODUCT WARRANTY LIABILITIES
 6 Months Ended
Jun. 30, 2019
Guarantees and Product Warranties [Abstract]  
PRODUCT WARRANTY LIABILITIES PRODUCT WARRANTY LIABILITIES
As of June 30, 2019, current and non-current product warranty liabilities were $27 million and $32 million, respectively. As of June 30, 2018, current and non-current product warranty liabilities were $28 million and $37 million, respectively.
Product warranty liability activities consist of the following (dollars in millions):
 
Three months ended June 30,
 
Six months ended June 30,
 
2019
 
2018
 
2019
 
2018
Beginning balance
$
64

 
$
62

 
$
66

 
$
55

Payments
(6
)
 
(10
)
 
(12
)
 
(19
)
Increase in liability (warranty issued during period)
6

 
12

 
11

 
21

Net adjustments to liability
(5
)
 
1

 
(6
)
 
8

Ending balance
$
59

 
$
65

 
$
59

 
$
65