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Intangible Assets and Goodwill
12 Months Ended
Sep. 01, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets and Goodwill
Intangible Assets and Goodwill

As of
 
2016
 
2015
 
 
Gross
Amount
 
Accumulated
Amortization
 
Gross
Amount
 
Accumulated
Amortization
Amortizing assets
 
 
 
 
 
 
 
 
Product and process technology
 
$
757

 
$
(402
)
 
$
864

 
$
(416
)
Other
 
1

 

 
2

 
(1
)
 
 
758

 
(402
)
 
866

 
(417
)
Non-amortizing assets
 
 
 
 
 
 
 
 
In-process R&D
 
108

 

 

 

 
 
 
 
 
 
 
 
 
 
 
$
866

 
$
(402
)
 
$
866

 
$
(417
)
 
 
 
 
 
 
 
 
 
Goodwill(1)
 
$
104

 
 
 
$
23

 
 

(1) 
Included in other noncurrent assets.

We perform an annual impairment assessment for goodwill and non-amortizing intangible assets in the fourth quarter of our fiscal year.

During 2016 and 2015, we capitalized $30 million and $98 million, respectively, for product and process technology with weighted-average useful lives of ten years and seven years, respectively. Amortization expense was $117 million, $117 million, and $110 million for 2016, 2015, and 2014, respectively.  The expected annual amortization expense for intangible assets held as of September 1, 2016 is $107 million for 2017, $93 million for 2018, $46 million for 2019, $30 million for 2020, and $25 million for 2021.

In the first quarter of 2016, we acquired Tidal Systems, Ltd., a developer of PCIe NAND Flash storage controllers, to enhance our NAND Flash controller technology for $148 million. In connection therewith, we recognized $108 million of in-process R&D; $81 million of goodwill, which was derived from expected cost reductions and other synergies and was assigned to our Storage Business Unit; and $41 million of deferred tax liabilities; which, in aggregate, represented substantially all of the purchase price. The in-process R&D was valued using a replacement cost approach, which included inputs of reproduction cost, including developer's profit, and opportunity cost. We will begin amortizing the in-process R&D when development is complete, which is estimated to be in 2018, and will amortize it over its then estimated useful life. The goodwill is not deductible for tax purposes.