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Warranty Obligation (Tables)
 3 Months Ended
Jul. 25, 2014
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Obligations
Changes in the Company’s product warranty obligations during the three months ended July 25, 2014 and July 26, 2013 consisted of the following:
 
Three months ended
(in millions)
July 25,
2014
 
July 26,
2013
Balance at the beginning of the period
$
32

 
$
35

Warranty claims provision
6

 
11

Settlements made
(7
)
 
(8
)
Balance at the end of the period
$
31

 
$
38