Intangible assets and goodwill (Tables)

12 Months Ended

Dec. 31, 2018

Intangible assets and goodwill

Schedule of intangible assets

	December 31, 2018						December 31, 2017
	Gross carrying value		Accumulated amortization		Net carrying value		Gross carrying value		Accumulated amortization		Net carrying value
Customer relationships	$	619	$	(58)	$	561	$	622	$	(16)	$	606
Backlog		332		(120)		212		331		(23)		308
Technologies		330		(86)		244		477		(107)		370
Software		198		(71)		127		245		(88)		157
Image library		80		(32)		48		80		(8)		72
Trade names and other		41		(9)		32		114		(27)		87
Non-compete agreements		21		(13)		8		20		(2)		18
Total intangible assets	$	1,621	$	(389)	$	1,232	$	1,889	$	(271)	$	1,618

Schedule of estimated annual amortization expense related to finite-lived intangible assets

	Year ended December 31,
		2019		2020		2021		2022		2023		2024 and thereafter
Amortization expense	$	276	$	240	$	168	$	129	$	56	$	363

Schedule of goodwill

	Space Systems		Imagery		Services		Total
Balance as of December 31, 2016	$	625	$	27	$	47	$	699
Acquisitions		143		1,400		126		1,669
Foreign currency translation		6		—		—		6
Balance as of December 31, 2017		774		1,427		173		2,374
Impairment losses		(494)		(142)		—		(636)
Goodwill on acquisition of Neptec		22		—		—		22
Disposal of immaterial subsidiary		—		—		(3)		(3)
Foreign currency translation		(6)		—		—		(6)
Balance as of December 31, 2018	$	296	$	1,285	$	170	$	1,751