CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net earnings attributable to BorgWarner Inc.		$ 50	$ 273	$ 471	$ 689
Other comprehensive loss
Foreign currency translation adjustments	[1]	(16)	(274)	(72)	(554)
Hedge instruments	[1]	(12)	8	26	13
Defined benefit postretirement plans	[1]	11	4	7	14
Total other comprehensive loss attributable to BorgWarner Inc.		(17)	(262)	(39)	(527)
Comprehensive income attributable to BorgWarner Inc	[1]	33	11	432	162
Net income attributable to noncontrolling interest, net of tax		18	19	49	58
Other comprehensive loss attributable to noncontrolling interest	[1]	(4)	(24)	(18)	(42)
Comprehensive income		$ 47	$ 6	$ 463	$ 178

[1] Net of income taxes.