CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net earnings		$ 537	$ 500	$ 746
Other comprehensive income (loss)
Foreign currency translation adjustments	[1]	(102)	176	(55)
Defined benefit postretirement plans	[1]	202	(100)	4
Other	[1]	0	0	(2)
Total other comprehensive income (loss) attributable to BorgWarner Inc.		100	76	(53)
Comprehensive income attributable to BorgWarner Inc	[1]	637	576	693
Net earnings attributable to noncontrolling interest, net of tax		102	67	51
Other comprehensive income (loss) attributable to the noncontrolling interest	[1]	(6)	20	(2)
Comprehensive income		$ 733	$ 663	$ 742

[1] Net of income taxes.