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Note 10 - Goodwill and Other Intangible Assets
9 Months Ended
Sep. 30, 2016
Notes to Financial Statements  
Goodwill and Intangible Assets Disclosure [Text Block]
10.      Goodwill and Other Intangible Assets

The carrying amount of goodwill by segment for the periods ended September 30, 2016 and December 31, 2015 is as follows (in millions):
 
Optical
Communications
 
Display
Technologies
 
Specialty
Materials
 
Life
Sciences
 
All
Other
 
Total
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Balance at December 31, 2015
$
439 
 
$
128
 
$
150
 
$
562
 
$
101
 
$
1,380 
Acquired goodwill 
(1)
 
175 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
175 
Measurement period adjustment 
(2)
 
(6)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(6)
Foreign currency translation adjustment
 
 
 
5
 
 
 
 
 
6
 
 
2
 
 
20 
Balance at September 30, 2016
$
615 
 
$
133
 
$
150
 
$
568
 
$
103
 
$
1,569 

(1)
The Company completed an acquisition in the Optical Communications segment during the second quarter of 2016 with a purchase price of $296 million.
(2)
In the third quarter of 2016, minor adjustments were made to the preliminary allocation of the total purchase consideration related to a second quarter acquisition.  The allocation is expected to be finalized in the fourth quarter of 2016, and any adjustments are not expected to be material.

Corning’s gross goodwill balances for the periods ended September 30, 2016 and December 31, 2015 were $8.1 billion and $7.9 billion, respectively.  Accumulated impairment losses were $6.5 billion for the periods ended September 30, 2016 and December 31, 2015, and were generated primarily through goodwill impairments related to the Optical Communications segment.

Other intangible assets are as follows (in millions):
 
September 30, 2016
 
December 31, 2015
 
Gross
 
Accumulated
amortization
 
Net
 
Gross
 
Accumulated
amortization
 
Net
Amortized intangible assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Patents, trademarks, and trade names 
$
367
 
$
176
 
$
191
 
$
350
 
$
162
 
$
188
Customer lists and other 
 
744
 
 
138
 
 
606
 
 
621
 
 
103
 
 
518
Total
$
1,111
 
$
314
 
$
797
 
$
971
 
$
265
 
$
706

Corning’s amortized intangible assets are primarily related to the Optical Communications and Life Sciences segments.  The net carrying amount of intangible assets increased during the first nine months of 2016, primarily due to acquisitions of $127 million of other intangible assets and foreign currency translation adjustments of $11 million, offset by amortization of $46 million.

Amortization expense related to these intangible assets is estimated to be $67 million for 2016, $72 million annually from 2017 to 2018, $71 million for 2019, and $66 million annually from 2020 to 2021.