CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net earnings attributable to BorgWarner Inc.		$ 234	$ 50	$ 743	$ 471
Other comprehensive income (loss)
Foreign currency translation adjustments		159	(16)	62	(72)
Hedge instruments	[1]	(28)	(12)	(46)	26
Postretirement defined benefit plans	[1]	(1)	11	4	7
Total other comprehensive income (loss) attributable to BorgWarner Inc.		130	(17)	20	(39)
Comprehensive income attributable to BorgWarner Inc.	[1]	364	33	763	432
Net earnings from continuing operations attributable to noncontrolling interest		15	18	44	49
Other comprehensive income (loss) attributable to noncontrolling interest	[1]	11	(4)	3	(18)
Comprehensive income		$ 390	$ 47	$ 810	$ 463

[1] Net of income taxes.