CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Net sales	$ 4,060	$ 3,416	$ 11,693	$ 11,183
Cost of sales	3,254	2,766	9,425	8,953
Gross profit	806	650	2,268	2,230
Selling, general and administrative expenses	397	343	1,179	1,084
Restructuring expense	8	51	50	143
Other operating expense, net	12	3	26	30
Operating income	389	253	1,013	973
Equity in affiliates’ earnings, net of tax	(10)	(12)	(29)	(40)
Unrealized (gain) loss on equity securities	(1)	61	27	337
Interest expense, net	12	18	42	75
Other postretirement income	(8)	(10)	(26)	(33)
Earnings before income taxes and noncontrolling interest	396	196	999	634
Provision for income taxes	104	79	252	149
Net earnings	292	117	747	485
Net earnings attributable to noncontrolling interest, net of tax	19	21	58	77
Net earnings attributable to BorgWarner Inc.	$ 273	$ 96	$ 689	$ 408
Earnings per share attributable to BorgWarner Inc. — basic (in dollar per share)	$ 1.17	$ 0.40	$ 2.92	$ 1.71
Earnings per share attributable to BorgWarner Inc. — diluted (in dollar per share)	$ 1.16	$ 0.40	$ 2.90	$ 1.70
Weighted average shares outstanding:
Basic (in shares)	234.3	238.2	236.5	238.0
Diluted (in shares)	235.6	239.8	237.5	239.3