Reporting Segments (Tables)

6 Months Ended

Jun. 30, 2012

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)	2012			2011			2012			2011
Engine	$	1,269.6		$	1,297.9		$	2,577.8		$	2,547.3
Drivetrain	593.9			525.7			1,205.3			1,012.1
Inter-segment eliminations	(7.1		)	(4.8		)	(14.2		)	(10.2		)
Net sales	$	1,856.4		$	1,818.8		$	3,768.9		$	3,549.2

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)	2012			2011			2012			2011
Engine	$	210.5		$	197.2		$	420.3		$	383.3
Drivetrain	54.6			38.9			115.8			70.9
Adjusted EBIT	265.1			236.1			536.1			454.2
Loss from disposal activities	37.9			—			37.9			—
Patent infringement settlement, net of legal costs incurred	—			(29.1		)	—			(29.1		)
Corporate, including equity in affiliates' earnings and stock-based compensation	21.2			28.8			57.3			59.2
Interest income	(1.3		)	(1.2		)	(2.7		)	(2.2		)
Interest expense and finance charges	12.6			20.5			27.7			38.9
Earnings before income taxes and noncontrolling interest	194.7			217.1			415.9			387.4
Provision for income taxes	68.5			49.8			126.0			90.7
Net earnings	126.2			167.3			289.9			296.7
Net earnings attributable to the noncontrolling interest, net of tax	5.6			5.3			11.3			10.2
Net earnings attributable to BorgWarner Inc.	$	120.6		$	162.0		$	278.6		$	286.5

Segment assets

Total Assets

(millions of dollars)	June 30, 2012		December 31, 2011
Engine	$	3,390.4	$	3,329.0
Drivetrain	1,631.5		1,562.8
Total	5,021.9		4,891.8
Corporate (a)	1,198.8		1,066.8
Total assets	$	6,220.7	$	5,958.6

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