CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net earnings attributable to BorgWarner Inc.		$ 157	$ 206
Other comprehensive income (loss)
Foreign currency translation adjustments		59	(66)
Hedge instruments	[1]	3	8
Postretirement defined benefit plans	[1]	(3)	3
Total other comprehensive income (loss) attributable to BorgWarner Inc.		59	(55)
Comprehensive income attributable to BorgWarner Inc.	[1]	216	151
Net earnings from continuing operations attributable to noncontrolling interest		14	15
Other comprehensive income (loss) attributable to noncontrolling interest	[1]	1	(5)
Comprehensive income		$ 231	$ 161

[1] Net of income taxes.