Intangible assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Finite-lived intangible assets:
Gross carrying value	$ 1,631		$ 1,631		$ 1,585
Accumulated amortization	(919)		(919)		(798)
Net carrying value	712		712		787
Amortization of intangible assets	44	$ 51	141	$ 154
Customer relationships
Finite-lived intangible assets:
Gross carrying value	615		615		615
Accumulated amortization	(223)		(223)		(190)
Net carrying value	392		392		425
Software
Finite-lived intangible assets:
Gross carrying value	446		446		379
Accumulated amortization	(179)		(179)		(152)
Net carrying value	267		267		227
Technologies
Finite-lived intangible assets:
Gross carrying value	367		367		367
Accumulated amortization	(329)		(329)		(278)
Net carrying value	38		38		89
Backlog
Finite-lived intangible assets:
Gross carrying value	86		86		107
Accumulated amortization	(86)		(86)		(89)
Net carrying value					18
Image library
Finite-lived intangible assets:
Gross carrying value	80		80		80
Accumulated amortization	(80)		(80)		(71)
Net carrying value					9
Trade names and other.
Finite-lived intangible assets:
Gross carrying value	37		37		37
Accumulated amortization	(22)		(22)		(18)
Net carrying value	$ 15		$ 15		$ 19