CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net sales	$ 3,759	$ 3,758	$ 7,633	$ 7,767
Cost of sales	3,047	2,996	6,171	6,187
Gross profit	712	762	1,462	1,580
Selling, general and administrative expenses	394	364	782	741
Restructuring expense	27	62	42	92
Other operating expense, net	19	19	14	27
Operating income	272	317	624	720
Equity in affiliates’ earnings, net of tax	(11)	(16)	(19)	(28)
Unrealized (gain) loss on equity securities	(11)	4	28	276
Interest expense, net	15	39	30	57
Other postretirement income	(9)	(12)	(18)	(23)
Earnings before income taxes and noncontrolling interest	288	302	603	438
Provision for income taxes	57	28	148	70
Net earnings	231	274	455	368
Net earnings attributable to noncontrolling interest, net of tax	15	27	39	56
Net earnings attributable to BorgWarner Inc.	$ 216	$ 247	$ 416	$ 312
Earnings per share attributable to BorgWarner Inc. — basic (in dollar per share)	$ 0.91	$ 1.03	$ 1.75	$ 1.31
Earnings per share attributable to BorgWarner Inc. — diluted (in dollar per share)	$ 0.91	$ 1.03	$ 1.74	$ 1.30
Weighted average shares outstanding:
Basic (in shares)	236.9	238.2	237.6	237.9
Diluted (in shares)	238.0	239.6	238.5	239.0