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Intangible Assets
12 Months Ended
Sep. 01, 2011
Notes to Financial Statements [Abstract] 
Intangible Assets
Intangible Assets

As of
 
2011
 
2010
 
 
Gross
Amount
 
Accumulated
Amortization
 
Gross
Amount
 
Accumulated
Amortization
Product and process technology
 
$
571

 
$
(203
)
 
$
439

 
$
(181
)
Customer relationships
 
127

 
(82
)
 
127

 
(66
)
Other
 
1

 
—

 
23

 
(19
)
 
 
$
699

 
$
(285
)
 
$
589

 
$
(266
)


During 2011 and 2010, we capitalized $170 million and $48 million, respectively, for product and process technology with weighted-average useful lives of 7 years.

Amortization expense was $79 million, $96 million and $75 million for 2011, 2010 and 2009, respectively.  Annual amortization expense for intangible assets is estimated to be $86 million for 2012, $80 million for 2013, $71 million for 2014, $53 million for 2015 and $46 million for 2016.