CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 14,838	$ 10,165	$ 10,168
Cost of sales	11,983	8,255	8,067
Gross profit	2,855	1,910	2,101
Selling, general and administrative expenses	1,460	951	873
Restructuring expense	163	203	72
Other operating expense (income), net	81	138	(147)
Operating income	1,151	618	1,303
Equity in affiliates’ earnings, net of tax	(48)	(18)	(32)
Unrealized loss (gain) on equity securities	362	(382)	0
Interest expense, net	93	61	43
Other postretirement (income) expense	(45)	(7)	27
Earnings before income taxes and noncontrolling interest	789	964	1,265
Provision for income taxes	150	397	468
Net earnings	639	567	797
Net earnings attributable to the noncontrolling interest, net of tax	102	67	51
Net earnings attributable to BorgWarner Inc.	$ 537	$ 500	$ 746
Earnings Per Share
Basic (in dollars per share)	$ 2.25	$ 2.35	$ 3.63
Diluted (in dollars per share)	$ 2.24	$ 2.34	$ 3.61
Weighted average shares outstanding:
Basic (in shares)	238.1	213.0	205.7
Diluted (in shares)	239.5	214.0	206.8