Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2013

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)	2013		2012		2011
Basic earnings per share:
Net earnings attributable to BorgWarner Inc.	$	624.3	$	500.9	$	550.1
Weighted average shares of common stock outstanding	228.600		225.304		218.458
Basic earnings per share of common stock	$	2.73	$	2.22	$	2.52
Diluted earnings per share:
Net earnings attributable to BorgWarner Inc.	$	624.3	$	500.9	$	550.1
Adjusted for net interest expense on convertible notes	—		5.8		21.5
Diluted net earnings attributable to BorgWarner Inc.	$	624.3	$	506.7	$	571.6
Weighted average shares of common stock outstanding	228.600		225.304		218.458
Effect of 3.50% convertible senior notes	—		6.644		22.778
Effect of warrant	—		6.800		10.430
Effect of stock-based compensation	2.737		4.006		5.270
Total dilutive effect on weighted average shares of common stock outstanding	2.737		17.450		38.478
Weighted average shares of common stock outstanding including dilutive shares	231.337		242.754		256.936
Diluted earnings per share of common stock	$	2.70	$	2.09	$	2.22
Total anti-dilutive shares:
Call options	—		3.878		12.282