CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net earnings attributable to BorgWarner Inc.		$ 224	$ 303	$ 381	$ 509
Other comprehensive income (loss)
Foreign currency translation adjustments		103	(31)	162	(97)
Cash flow hedges	[1]	(6)	(26)	(3)	(18)
Postretirement defined benefit plans	[1]	(4)	2	(7)	5
Total other comprehensive income (loss) attributable to BorgWarner Inc.		93	(55)	152	(110)
Comprehensive income attributable to BorgWarner Inc.	[1]	317	248	533	399
Net earnings from continuing operations attributable to noncontrolling interest		8	14	22	29
Other comprehensive income (loss) attributable to noncontrolling interest	[1]	6	(3)	7	(8)
Comprehensive income		$ 331	$ 259	$ 562	$ 420

[1] Net of income taxes.