CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net sales	$ 3,874	$ 4,009
Cost of sales	3,124	3,191
Gross profit	750	818
Selling, general and administrative expenses	388	377
Restructuring expense	15	30
Other operating (income) expense, net	(5)	8
Operating income	352	403
Equity in affiliates’ earnings, net of tax	(8)	(12)
Unrealized loss on equity securities	39	272
Interest expense, net	15	18
Other postretirement income	(9)	(11)
Earnings before income taxes and noncontrolling interest	315	136
Provision for income taxes	91	42
Net earnings	224	94
Net earnings attributable to noncontrolling interest, net of tax	24	29
Net earnings attributable to BorgWarner Inc.	$ 200	$ 65
Earnings per share attributable to BorgWarner Inc. — basic (in dollar per share)	$ 0.84	$ 0.27
Earnings per share attributable to BorgWarner Inc. — diluted (in dollar per share)	$ 0.84	$ 0.27
Weighted average shares outstanding:
Basic (in shares)	238.2	237.7
Diluted (in shares)	239.0	238.4