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Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2013
Commitments and Contingencies Disclosure [Abstract]  
Changes in product warranty accrual
We warrant numerous products, the terms of which vary widely. In general, we warrant products against defect and specific non-performance. The table below provides the changes in our product warranty accrual.
 
(in millions)
2013
 
2012
Warranty accrual – January 1
$
40

 
$
42

Net changes for product warranties in the period
8

 
6

Settlement of warranty claims
(8
)
 
(8
)
Warranty accrual – March 31
$
40

 
$
40