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Goodwill and Other Intangible Assets | 12 Months Ended
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Dec. 31, 2018
Goodwill and Other Intangible Assets [Abstract] |
Goodwill and Other Intangible Assets | 8.Goodwill and Oth er Intangible Assets ﻿ Goodwill ﻿ Changes in the carrying amount of goodwill for the twelve months ended December 31, 2018 and 2017 were as follows (in millions): ﻿
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﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | Display Technologies |  | Optical Communications |  | Specialty Materials |  | Life Sciences |  | All Other |  | Total
﻿Balance at December 31, 2016 | $ | 126 |  | $ | 645 |  | $ | 150 |  | $ | 558 |  | $ | 98 |  | $ | 1,577
﻿Acquired goodwill (1) |  |  |  |  | 22 |  |  |  |  |  | 43 |  |  | 34 |  |  | 99
﻿Measurement period adjustment (2) |  |  |  |  | (1) |  |  |  |  |  | 1 |  |  | (28) |  |  | (28)
﻿Foreign currency translation adjustment |  | 10 |  |  | 5 |  |  |  |  |  | 21 |  |  | 10 |  |  | 46
﻿Balance at December 31, 2017 | $ | 136 |  | $ | 671 |  | $ | 150 |  | $ | 623 |  | $ | 114 |  | $ | 1,694
﻿Acquired goodwill (3) |  |  |  |  | 257 |  |  |  |  |  | 2 |  |  |  |  |  | 259
﻿Measurement period adjustment |  |  |  |  | 11 |  |  |  |  |  |  |  |  |  |  |  | 11
﻿Foreign currency translation adjustment |  | (4) |  |  | (13) |  |  |  |  |  | (8) |  |  | (3) |  |  | (28)
﻿Balance at December 31, 2018 | $ | 132 |  | $ | 926 |  | $ | 150 |  | $ | 617 |  | $ | 111 |  | $ | 1,936
﻿
| (1) |  | The Company completed two small acquisitions in the third quarter of 2017 which are reported in the Optical Communications and Life Sciences segment and one small acquisition in the first quarter of 2017 which is reported in All Other.
| (2) |  | In the second quarter of 2017, the Company recorded measurement period adjustments of $28 million related to an acquisition completed in a previous period.
| (3) |  | The Company completed the acquisition of CMD during the second quarter and the fourth quarter of 2018.
﻿ Corning’s gross goodwill balance for the years ended December 31, 2018 and 2017 were $8.4 billion and $8.2 billion, respectively. Accumulated impairment losses were $6.5 billion for the years ended December 31, 2018 and 2017, respectively, and were generated primarily through goodwill impairments related to the Optical Communications segment. ﻿ Other Intangible Assets ﻿ Other intangible assets follow (in millions): ﻿
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﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | December 31,
﻿ | 2018 |  | 2017
﻿ | Gross |  | Accumulated amortization |  | Net |  | Gross |  | Accumulated amortization |  | Net
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﻿Amortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Patents, trademarks & trade names | $ | 465 |  | $ | 203 |  | $ | 262 |  | $ | 382 |  | $ | 188 |  | $ | 194
﻿Customer list and other |  | 1,308 |  |  | 278 |  |  | 1,030 |  |  | 884 |  |  | 209 |  |  | 675
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﻿Total | $ | 1,773 |  | $ | 481 |  | $ | 1,292 |  | $ | 1,266 |  | $ | 397 |  | $ | 869
﻿ 8.Goodwill and Other Intangible Assets (continued) ﻿ Amortized intangible assets are primarily related to the Optical Communications and Life Sciences segments. The net carrying amount of intangible assets increased by $423 million during the year ended December 31, 2018, primarily due to the acquisition of CMD of $5 25 million and other acquisition of $9 million of other intangible assets, offset by amortization of $94 million and foreign currency translation and other adjustments of $17 million. ﻿ Amortization expense related to all intangible assets is estimated to be $11 5 million annually for 2019, $11 4 million annually for 20 20, $11 3 million annually for 2021, $11 1 million annually for 202 2, and $1 10 million annually for 2023.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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