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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]  
Warranty Reserve Activity The following table identifies the activity relating to the warranty reserve for the three months ended March 31:
In millions
2019
 
2018
Warranty reserve liability
 
 
 
Beginning balance at January 1
$
3

 
$
4

Accrual of warranties issued

 
1

Settlements (in cash or in kind)
(1
)
 
(2
)
Balance at March 31
$
2

 
$
3