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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2015
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
2015
 
2014
Warranty reserve liability
 
 
 
Beginning balance at January 1
$
7

 
$
8

Provisions for warranties issued
2

 
3

Settlements (in cash or in kind)
(3
)
 
(4
)
Balance at March 31
$
6

 
$
7