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Commitments and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Product Warranty Liability
The Company recorded the activity related to the warranty reserve for the six months ended June 30 as follows:
In millions
2018
 
2017
Warranty reserve liability
 
 
 
Beginning balance as of January 1
$
26

 
$
27

Accruals for warranties issued
12

 
18

Settlements (in cash or in kind)
(17
)
 
(21
)
Ending balance as of June 30
$
21

 
$
24