CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Net sales	$ 14,086	$ 14,198	$ 12,635
Cost of sales	11,438	11,630	10,266
Gross profit	2,648	2,568	2,369
Selling, general and administrative expenses - R&D, net	1,350	1,316	1,290
Restructuring expense	74	79	48
Other operating expense (income), net	32	(16)	(8)
Impairment charges	646	29	30
Operating income	546	1,160	1,009
Equity in affiliates’ earnings, net of tax	(27)	(30)	(28)
Unrealized and realized loss on equity and debt securities	(1)	(174)	(73)
Interest expense, net	(20)	(10)	(51)
Other postretirement expense	13	15	0
Earnings from continuing operations before income taxes and noncontrolling interest	539	991	913
Provision for income taxes	111	289	195
Net earnings from continuing operations	428	702	718
Net (loss) earnings from discontinued operations	(29)	(7)	308
Net earnings	399	695	1,026
Net earnings from continuing operations attributable to the noncontrolling interest, net of tax	61	70	82
Net earnings attributable to BorgWarner Inc.	338	625	944
Amounts attributable to BorgWarner Inc.:
Net earnings from continuing operations	$ 367	$ 632	$ 636
Basic earnings per share:
Earnings per share from continuing operations — basic (in dollar per share)	$ 1.64	$ 2.71	$ 2.70
(Loss) earnings per share from discontinued operations — basic (in dollars per share)	(0.13)	(0.03)	1.31
Earnings per share attributable to BorgWarner Inc. — basic (in dollar per share)	1.51	2.68	4.01
Diluted earnings per share:
Earnings per share from continuing operations — diluted (in dollar per share)	1.63	2.70	2.69
(Loss) earnings per share from discontinued operations — diluted (in dollars per share)	(0.13)	(0.03)	1.30
Earnings per share attributable to BorgWarner Inc. — diluted (in dollar per share)	$ 1.50	$ 2.67	$ 3.99
Weighted average shares outstanding:
Basic (in shares)	223.5	232.8	235.5
Diluted (in shares)	224.8	234.4	236.8