CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net earnings attributable to BorgWarner Inc.		$ 200	$ 65
Other comprehensive income (loss)
Foreign currency translation adjustments	[1]	(18)	(87)
Hedge instruments	[1]	0	(6)
Defined benefit postretirement plans	[1]	5	8
Total other comprehensive loss attributable to BorgWarner Inc.		(13)	(85)
Comprehensive income (loss) attributable to BorgWarner Inc.	[1]	187	(20)
Net earnings attributable to noncontrolling interest, net of tax		24	29
Other comprehensive loss attributable to noncontrolling interest	[1]	(1)	(5)
Comprehensive income		$ 210	$ 4

[1] Net of income taxes.