Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Schedule of Earnings Per Share Reconciliation

	Three Months Ended June 30,				Six Months Ended June 30,
(in millions, except per share amounts)	2017		2016		2017		2016
Basic earnings per share:
Net earnings attributable to BorgWarner Inc.	$	212.0	$	164.4	$	401.2	$	328.5
Weighted average shares of common stock outstanding	210.572		215.735		211.084		216.562
Basic earnings per share of common stock	$	1.01	$	0.76	$	1.90	$	1.52
Diluted earnings per share:
Net earnings attributable to BorgWarner Inc.	$	212.0	$	164.4	$	401.2	$	328.5
Weighted average shares of common stock outstanding	210.572		215.735		211.084		216.562
Effect of stock-based compensation	0.906		0.928		0.773		0.839
Weighted average shares of common stock outstanding including dilutive shares	211.478		216.663		211.857		217.401
Diluted earnings per share of common stock	$	1.00	$	0.76	$	1.89	$	1.51