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Intangible Assets
 9 Months Ended
May 30, 2013
Disclosure Text Block [Abstract]  
Intangible Assets
Intangible Assets

As of
 
May 30, 2013
 
August 30, 2012
 
 
Gross
Amount
 
Accumulated
Amortization
 
Gross
Amount
 
Accumulated
Amortization
Product and process technology
 
$
580

 
$
(266
)
 
$
575

 
$
(234
)
Customer relationships
 
127

 
(110
)
 
127

 
(98
)
Other
 
1

 
(1
)
 
1

 
—

 
 
$
708

 
$
(377
)
 
$
703

 
$
(332
)


During the first nine months of 2013 and 2012, we capitalized $24 million and $39 million, respectively, for product and process technology with weighted-average useful lives of 10 years and 9 years, respectively.

Amortization expense was $21 million and $62 million for the third quarter and first nine months of 2013, respectively, and $23 million and $67 million for the third quarter and first nine months of 2012, respectively.  Annual amortization expense is estimated to be $83 million for 2013, $77 million for 2014, $60 million for 2015, $52 million for 2016 and $41 million for 2017.