Intangible assets and goodwill

12 Months Ended

Dec. 31, 2020

Intangible assets and goodwill

Intangible assets and goodwill

9.  INTANGIBLE ASSETS AND GOODWILL

	December 31,						December 31,
	2020						2019
	Gross carrying value		Accumulated amortization		Net carrying value		Gross carrying value		Accumulated amortization		Net carrying value
Customer relationships	$	615	$	(146)	$	469	$	615	$	(102)	$	513
Backlog		129		(79)		50		330		(217)		113
Technologies		369		(211)		158		320		(144)		176
Software		298		(125)		173		213		(83)		130
Image library		80		(58)		22		80		(48)		32
Trade names and other		38		(15)		23		37		(10)		27
Intangible assets	$	1,529	$	(634)	$	895	$	1,595	$	(604)	$	991

During the year ended December 31, 2020, the gross carrying value and accumulated amortization balances for fully amortized backlog were removed. Amortization expense related to intangible assets was $255 million, $269 million and $289 million for the years ended December 31, 2020, 2019 and 2018, respectively.

The estimated annual amortization expense related to finite-lived intangible assets as of December 31, 2020, is as follows:

	Year Ended December 31,
		2021		2022		2023		2024		2025		2026 and thereafter
Amortization expense	$	190	$	176	$	80	$	65	$	54	$	330

Goodwill balances for each reporting segment are as follows:

	Earth Intelligence		Space Infrastructure		Total
Balance as of December 31, 2018
Goodwill	$	1,597	$	17	$	1,614
Accumulated impairment losses		(142)		(17)		(159)
		1,455		—		1,455
Balance as of December 31, 2019
Goodwill		1,597		17		1,614
Accumulated impairment losses		(142)		(17)		(159)
		1,455		—		1,455
Acquisition of Vricon		172		—		172
Balance as of December 31, 2020
Goodwill		1,769		17		1,786
Accumulated impairment losses		(142)		(17)		(159)
	$	1,627	$	—	$	1,627