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Intangibles and Goodwill
12 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangibles and Goodwill
Intangibles and Goodwill

Intangible Assets
Intangible assets, excluding goodwill, as of December 31, 2015 and 2014 consist of (tables in millions): 
 
December 31, 2015
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Book Value
Purchased technology
$
3,272

 
$
(1,903
)
 
$
1,369

Patents
225

 
(132
)
 
93

Software licenses
112

 
(94
)
 
18

Trademarks and tradenames
254

 
(157
)
 
97

Customer relationships and customer lists
1,523

 
(1,087
)
 
436

Leasehold interest
152

 
(20
)
 
132

Other
46

 
(42
)
 
4

Total intangible assets, excluding goodwill
$
5,584

 
$
(3,435
)
 
$
2,149


 
December 31, 2014
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Book Value
Purchased technology
$
2,935

 
$
(1,668
)
 
$
1,267

Patents
225

 
(117
)
 
108

Software licenses
108

 
(93
)
 
15

Trademarks and tradenames
226

 
(136
)
 
90

Customer relationships and customer lists
1,473

 
(974
)
 
499

Leasehold interest
152

 
(16
)
 
136

Other
44

 
(34
)
 
10

Total intangible assets, excluding goodwill
$
5,163

 
$
(3,038
)
 
$
2,125


 
Amortization expense on intangibles was $395 million, $402 million and $389 million in 2015, 2014 and 2013, respectively. As of December 31, 2015, amortization expense on intangible assets for the next five years is expected to be as follows (table in millions):
2016
$
350

2017
329

2018
317

2019
274

2020
193

Total
$
1,463


Goodwill
Changes in the carrying amount of goodwill, net, on a consolidated basis and by segment, for the years ended December 31, 2015 and 2014 consists of the following (table in millions): 
 
Information
Storage
 
Enterprise
Content
Division
 
RSA
Information
Security
 
Pivotal
 
VMware
Virtual
Infrastructure
 
Total
Balance, January 1, 2014
$
7,486

 
$
1,487

 
$
2,203

 
$
177

 
$
3,071

 
$
14,424

Goodwill resulting from acquisitions
774

 

 

 

 
941

 
1,715

Finalization of purchase price allocations and other, net

 
(1
)
 

 

 
(4
)
 
(5
)
Goodwill transferred in formation of Pivotal
6

 

 

 
(6
)
 

 

Balance, December 31, 2014
$
8,266

 
$
1,486

 
$
2,203

 
$
171

 
$
4,008

 
$
16,134

Goodwill resulting from acquisitions
917

 

 

 
16

 
29

 
962

Finalization of purchase price allocations and other, net
2

 
(8
)
 

 

 

 
(6
)
Balance, December 31, 2015
$
9,185

 
$
1,478

 
$
2,203

 
$
187

 
$
4,037

 
$
17,090



The transfer of goodwill pursuant to the Information Storage segment acquisition of the Data Computing Appliance and implementation services businesses from the Pivotal segment is shown above for the year ended December 31, 2014. The amount of transferred goodwill was determined using the relative fair value method.
Valuation of Goodwill and Intangibles
We perform an assessment of the recoverability of goodwill, at least annually, in the fourth quarter of each year. Our assessment is performed at the reporting unit level which, for certain of our operating segments, is one step below our reporting segment level. We employ both qualitative and quantitative tests of our goodwill. For some of our reporting units, we performed a qualitative assessment on goodwill to determine whether a quantitative assessment was necessary and determined there were no indicators of potential impairment. For other reporting units we evaluated goodwill using a quantitative model. For all of our goodwill assessments, we concluded that there was sufficient market value above the carrying value of those reporting units so that we would not expect any near term changes in the operating results that would trigger an impairment. Accordingly, there was no impairment in 2015, 2014 or 2013.
The determination of relevant comparable industry companies impacts our assessment of fair value. Should the operating performance of our reporting units change in comparison to these companies or should the valuation of these companies change, this could impact our assessment of the fair value of the reporting units. Our discounted cash flow analyses factor in assumptions on revenue and expense growth rates. These estimates are based upon our historical experience and projections of future activity, factoring in customer demand, changes in technology and a cost structure necessary to achieve the related revenues. Additionally, these discounted cash flow analyses factor in expected amounts of working capital and weighted average cost of capital. Changes in judgments on any of these factors could materially impact the value of the reporting unit.
Other intangible assets are evaluated based upon the expected period the asset will be utilized, forecasted cash flows, changes in technology and customer demand. Changes in judgments on any of these factors could materially impact the value of the assets.