CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Net sales	$ 3,638	$ 3,603	$ 7,153	$ 7,198
Cost of sales	2,998	2,918	5,874	5,869
Gross profit	640	685	1,279	1,329
Selling, general and administrative expenses	317	341	632	670
Restructuring expense	17	25	48	44
Other operating expense, net	14	22	31	23
Impairment charges	3	0	42	0
Operating income	289	297	526	592
Equity in affiliates’ earnings, net of tax	(8)	(12)	(18)	(17)
Unrealized (gain) loss on equity securities	(1)	0	(1)	2
Interest expense, net	12	8	24	13
Other postretirement expense	2	3	5	6
Earnings from continuing operations before income taxes and noncontrolling interest	284	298	516	588
Provision (benefit) for income taxes	52	(31)	113	31
Net earnings from continuing operations	232	329	403	557
Net loss from discontinued operations	0	(12)	0	(19)
Net earnings	232	317	403	538
Net earnings from continuing operations attributable to noncontrolling interest	8	14	22	29
Net earnings attributable to BorgWarner Inc.	224	303	381	509
Amounts attributable to BorgWarner Inc.:
Net earnings from continuing operations	224	315	381	528
Net loss from discontinued operations	$ 0	$ (12)	$ 0	$ (19)
Basic earnings per share:
Earnings per share from continuing operations — basic (in dollar per share)	$ 1.04	$ 1.39	$ 1.76	$ 2.33
Loss per share from discontinued operations — basic (in dollar per share)	0	(0.05)	0	(0.08)
Earnings per share attributable to BorgWarner Inc. — basic (in dollar per share)	1.04	1.34	1.76	2.25
Diluted earnings per share:
Earnings per share from continuing operations — diluted (in dollar per share)	1.03	1.39	1.75	2.32
Loss per share from discontinued operations — diluted (in dollar per share)	0	(0.05)	0	(0.08)
Earnings per share attributable to BorgWarner Inc. — diluted (in dollar per share)	$ 1.03	$ 1.34	$ 1.75	$ 2.24
Weighted average shares outstanding:
Basic (in shares)	216.3	226.1	216.7	227.0
Diluted (in shares)	218.2	227.2	218.1	227.9