Reporting Segments (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Net Sales by Reporting Segment

Net Sales by Reporting Segment

	Three Months Ended June 30,						Six Months Ended June 30,
(millions of dollars)	2013			2012			2013			2012
Engine	$	1,288.3		$	1,269.6		$	2,545.8		$	2,577.8
Drivetrain	613.5			593.9			1,214.9			1,205.3
Inter-segment eliminations	(7.9		)	(7.1		)	(15.7		)	(14.2		)
Net sales	$	1,893.9		$	1,856.4		$	3,745.0		$	3,768.9

Segment Earnings Before Interest and Income Taxes

Adjusted Earnings Before Interest, Income Taxes and Noncontrolling Interest (“Adjusted EBIT”)

	Three Months Ended June 30,						Six Months Ended June 30,
(millions of dollars)	2013			2012			2013			2012
Engine	$	220.3		$	210.5		$	422.6		$	420.3
Drivetrain	59.8			54.6			115.8			115.8
Adjusted EBIT	280.1			265.1			538.4			536.1
Program termination agreement	—			—			11.3			—
Retirement related obligations	—			—			5.9			—
Loss from disposal activities	—			37.9			—			37.9
Corporate, including equity in affiliates' earnings and stock-based compensation	25.6			21.2			58.5			57.3
Interest income	(1.0		)	(1.3		)	(2.0		)	(2.7		)
Interest expense and finance charges	8.8			12.6			18.5			27.7
Earnings before income taxes and noncontrolling interest	246.7			194.7			446.2			415.9
Provision for income taxes	66.6			68.5			117.5			126.0
Net earnings	180.1			126.2			328.7			289.9
Net earnings attributable to the noncontrolling interest, net of tax	6.0			5.6			12.6			11.3
Net earnings attributable to BorgWarner Inc.	$	174.1		$	120.6		$	316.1		$	278.6

Segment assets

Total Assets

(millions of dollars)	June 30, 2013		December 31, 2012
Engine	$	3,451.0	$	3,299.2
Drivetrain	1,762.3		1,652.2
Total	5,213.3		4,951.4
Corporate (a)	1,492.1		1,449.4
Total assets	$	6,705.4	$	6,400.8

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(a) Corporate assets include investments and advances and deferred income taxes