Segment Information - Schedule of Significant segment expenses (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Total direct costs		$ (1,838)	$ (1,773)	$ (3,572)	$ (3,578)
Total production overhead costs		(375)	(357)	(740)	(725)
Cost of sales	[1]	(2,213)	(2,130)	(4,312)	(4,303)
Research, development and engineering expenses (gross)		(155)	(160)	(302)	(317)
Reimbursements from customer funded engineering projects		48	44	100	88
Research, development and engineering expenses, net		$ (107)	$ (116)	$ (202)	$ (229)

[1] Including a gain on sale of property in China of $6 million in the first quarter of 2025.