Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2020

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:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions, except per share amounts)	2020		2019		2020		2019
Basic earnings per share:
Net earnings attributable to BorgWarner Inc.	$	111	$	194	$	142	$	526
Weighted average shares of common stock outstanding	206.0		205.3		205.9		205.9
Basic earnings per share of common stock	$	0.54	$	0.94	$	0.69	$	2.56
Diluted earnings per share:
Net earnings attributable to BorgWarner Inc.	$	111	$	194	$	142	$	526
Weighted average shares of common stock outstanding	206.0		205.3		205.9		205.9
Effect of stock-based compensation	1.3		1.0		0.8		0.9
Weighted average shares of common stock outstanding including dilutive shares	207.3		206.3		206.7		206.8
Diluted earnings per share of common stock	$	0.53	$	0.94	$	0.69	$	2.54
Anti-dilutive stock-based awards excluded from the calculation of diluted earnings per share:	—		0.1		—		0.1