Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 2,566	$ 2,784
Cost of sales	2,047	2,193
Gross profit	519	591
Selling, general and administrative expenses	226	253
Other expense, net	29	5
Operating income	264	333
Equity in affiliates’ earnings, net of tax	(9)	(10)
Interest income	(3)	(2)
Interest expense	14	16
Other postretirement income	0	(3)
Earnings before income taxes and noncontrolling interest	262	332
Provision for income taxes	91	95
Net earnings	171	237
Net earnings attributable to the noncontrolling interest, net of tax	11	12
Net earnings attributable to BorgWarner Inc.	$ 160	$ 225
Earnings per share — basic	$ 0.77	$ 1.07
Earnings per share — diluted	$ 0.77	$ 1.07
Basic	206.5	209.5
Diluted	207.1	210.8