EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Basic earnings per share:
Net earnings attributable to BorgWarner Inc.	$ 200	$ 65
Weighted average shares of common stock outstanding (in shares)	238.2	237.7
Basic earnings per share of common stock (in dollar per share)	$ 0.84	$ 0.27
Diluted earnings per share:
Net earnings attributable to BorgWarner Inc.	$ 200	$ 65
Weighted average shares of common stock outstanding (in shares)	238.2	237.7
Effect of stock-based compensation (in shares)	0.8	0.7
Weighted average shares of common stock outstanding including dilutive shares (in shares)	239.0	238.4
Diluted earnings per share of common stock (in dollar per share)	$ 0.84	$ 0.27