CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net earnings attributable to BorgWarner Inc.		$ 303	$ 204	$ 509	$ 421
Other comprehensive loss
Foreign currency translation adjustments		(31)	(95)	(97)	(56)
Hedge instruments	[1]	(26)	24	(18)	38
Postretirement defined benefit plans	[1]	2	(3)	5	(4)
Total other comprehensive loss attributable to BorgWarner Inc.		(55)	(74)	(110)	(22)
Comprehensive income attributable to BorgWarner Inc.	[1]	248	130	399	399
Net earnings from continuing operations attributable to noncontrolling interest		14	18	29	31
Other comprehensive loss attributable to noncontrolling interest	[1]	(3)	(13)	(8)	(14)
Comprehensive income		$ 259	$ 135	$ 420	$ 416

[1] Net of income taxes.