CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Net sales	$ 3,515	$ 3,595
Cost of sales	2,876	2,951
Gross profit	639	644
Selling, general and administrative expenses	315	329
Restructuring expense	31	19
Other operating expense, net	17	1
Impairment charges	39	0
Operating income	237	295
Equity in affiliates’ earnings, net of tax	(10)	(5)
Unrealized and realized loss on equity and debt securities	0	2
Interest expense, net	12	5
Other postretirement expense	3	3
Earnings from continuing operations before income taxes and noncontrolling interest	232	290
Provision for income taxes	61	62
Net earnings from continuing operations	171	228
Net loss from discontinued operations	0	(7)
Net earnings	171	221
Net earnings from continuing operations attributable to noncontrolling interest	14	15
Net earnings attributable to BorgWarner Inc.	157	206
Amounts attributable to BorgWarner Inc.:
Net earnings from continuing operations	157	213
Net loss from discontinued operations	$ 0	$ (7)
Basic earnings per share:
Earnings per share from continuing operations — basic (in dollar per share)	$ 0.72	$ 0.94
Loss per share from discontinued operations — basic (in dollar per share)	0	(0.03)
Earnings per share attributable to BorgWarner Inc. — basic (in dollar per share)	0.72	0.91
Diluted earnings per share:
Earnings per share from continuing operations — diluted (in dollar per share)	0.72	0.93
Loss per share from discontinued operations — diluted (in dollar per share)	0	(0.03)
Earnings per share attributable to BorgWarner Inc. — diluted (in dollar per share)	$ 0.72	$ 0.90
Weighted average shares outstanding:
Basic (in shares)	217.2	227.7
Diluted (in shares)	218.1	228.3