BorgWarner Inc. and Consolidated Subsidiaries Statements of Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings attributable to BorgWarner Inc.		$ 746	$ 931	$ 440
Foreign currency translation adjustments		(55)	(148)	237
Hedge instruments	[1]	0	2	(6)
Defined benefit postretirement plans	[1]	4	(23)	0
Other	[1]	(2)	(1)	1
Total other comprehensive (loss) income attributable to BorgWarner Inc.		(53)	(170)	232
Comprehensive income attributable to BorgWarner Inc.	[1]	693	761	672
Net earnings attributable to the noncontrolling interest, net of tax		51	54	43
Other comprehensive (loss) income attributable to the noncontrolling interest	[1]	(2)	(8)	11
Comprehensive income		$ 742	$ 807	$ 726

[1] * Net of income taxes.