Goodwill and Other Intangible Assets

12 Months Ended

Dec. 31, 2019

Goodwill and Other Intangible Assets [Abstract]

Goodwill and Other Intangible Assets

9.Goodwill and Other Intangible Assets

Goodwill

Changes in the carrying amount of goodwill for the twelve months ended December 31, 2019 and 2018, were as follows (in millions):

	Display ‎ Technologies		Optical ‎ Communications		Specialty ‎Materials		Life ‎Sciences		All ‎Other		Total
Balance at December 31, 2017	$	136	$	671	$	150	$	623	$	114	$	1,694
Acquired goodwill (1)				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
Measurement period adjustment				3								3
Foreign currency translation ‎  adjustment		(3)		2				(1)		(2)		(4)
Balance at December 31, 2019	$	129	$	931	$	150	$	616	$	109	$	1,935

(1)The Company completed the acquisition of CMD in 2018.

9.Goodwill and Other Intangible Assets (continued)

Corning’s gross goodwill balance and accumulated impairment losses were $8.4 billion and $6.5 billion, respectively, for the years ended December 31, 2019 and 2018. Accumulated impairment losses were generated primarily through goodwill impairments related to the Optical Communications segment.

Other Intangible Assets

Other intangible assets follow (in millions):

	December 31,
	2019						2018
	Gross		Accumulated ‎amortization		Net		Gross		Accumulated ‎amortization		Net
Amortized intangible assets:
Patents, trademarks & trade ‎  names	$	469	$	228	$	241	$	465	$	203	$	262
Customer list and other		1,301		357		944		1,308		278		1,030
Total	$	1,770	$	585	$	1,185	$	1,773	$	481	$	1,292

Amortized intangible assets are primarily related to the Optical Communications and Life Sciences segments. The net carrying amount of intangible assets decreased by $107 million during the year ended December 31, 2019, primarily due to acquisitions of $9 million of patents and other intangible assets, offset by amortization of $113 million and foreign currency translation and other adjustments of $3 million.

Amortization expense related to all intangible assets is estimated to be $113 million annually for 2020, $113 million annually for 2021, $111 million annually for 2022, $110 million annually for 2023, and $110 million annually for 2024.