Intangible assets

6 Months Ended

Jun. 30, 2022

Intangible assets

Intangible assets

6. INTANGIBLE ASSETS

	June 30, 2022						December 31, 2021
	Gross carrying value		Accumulated amortization		Net carrying value		Gross carrying value		Accumulated amortization		Net carrying value
Customer relationships	$	615	$	(212)	$	403	$	615	$	(190)	$	425
Software		424		(171)		253		379		(152)		227
Technologies		367		(312)		55		367		(278)		89
Backlog		107		(103)		4		107		(89)		18
Image library		80		(77)		3		80		(71)		9
Trade names and other		37		(21)		16		37		(18)		19
Intangible assets	$	1,630	$	(896)	$	734	$	1,585	$	(798)	$	787

Amortization expense related to intangible assets was $48 million and $52 million, for the three months ended June 30, 2022 and 2021, respectively, and $97 million and $103 million for the six months ended June 30, 2022 and 2021, respectively.