Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Schedule of Earnings per Share reconciliation [Text Block]

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 per share amounts)	2014		2013		2012
Basic earnings per share:
Net earnings attributable to BorgWarner Inc.	$	655.8	$	624.3	$	500.9
Weighted average shares of common stock outstanding	227.150		228.600		225.304
Basic earnings per share of common stock	$	2.89	$	2.73	$	2.22
Diluted earnings per share:
Net earnings attributable to BorgWarner Inc.	$	655.8	$	624.3	$	500.9
Adjusted for net interest expense on convertible notes	—		—		5.8
Diluted net earnings attributable to BorgWarner Inc.	$	655.8	$	624.3	$	506.7
Weighted average shares of common stock outstanding	227,150		228,600		225,304
Effect of 3.50% convertible senior notes	—		—		6.644
Effect of warrant	—		—		6.800
Effect of stock-based compensation	1.774		2.737		4.006
Total dilutive effect on weighted average shares of common stock outstanding	1.774		2.737		17.450
Weighted average shares of common stock outstanding including dilutive shares	228.924		231.337		242.754
Diluted earnings per share of common stock	$	2.86	$	2.70	$	2.09
Total anti-dilutive shares:
Call options	—		—		3.878