Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Schedule of Earnings Per Share Reconciliation

	Three Months Ended March 31,
(in millions, except per share amounts)	2020		2019
Basic earnings per share:
Net earnings attributable to BorgWarner Inc.	$	129	$	160
Weighted average shares of common stock outstanding	205.7		206.5
Basic earnings per share of common stock	$	0.63	$	0.77
Diluted earnings per share:
Net earnings attributable to BorgWarner Inc.	$	129	$	160
Weighted average shares of common stock outstanding	205.7		206.5
Effect of stock-based compensation	0.5		0.6
Weighted average shares of common stock outstanding including dilutive shares	206.2		207.1
Diluted earnings per share of common stock	$	0.63	$	0.77
Anti-dilutive stock-based awards excluded from the calculation of diluted earnings per share:	—		0.5