Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Schedule of earnings per share reconciliation

The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share of common stock:

	Year Ended December 31,
(in millions except share and per share amounts)	2021		2020		2019
Basic earnings per share:
Net earnings attributable to BorgWarner Inc.	$	537	$	500	$	746
Weighted average shares of common stock outstanding	238.1		213.0		205.7
Basic earnings per share of common stock	$	2.25	$	2.35	$	3.63
Diluted earnings per share:
Net earnings attributable to BorgWarner Inc.	$	537	$	500	$	746
Weighted average shares of common stock outstanding	238.1		213.0		205.7
Effect of stock-based compensation	1.4		1.0		1.1
Weighted average shares of common stock outstanding including dilutive shares	239.5		214.0		206.8
Diluted earnings per share of common stock	$	2.24	$	2.34	$	3.61
Antidilutive stock-based awards excluded from the calculation of diluted earnings per share	—		—		0.1