Reporting Segments

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Segment Reporting Disclosure

Reporting Segments

The Company's business is comprised of two reporting segments: Engine and Drivetrain. These segments are strategic business groups, which are managed separately as each represents a specific grouping of related automotive components and systems.

The Company allocates resources to each segment based upon the projected after-tax return on invested capital ("ROIC") of its business initiatives. ROIC is comprised of Adjusted EBIT after deducting notional taxes compared to the projected average capital investment required. Adjusted EBIT is comprised of earnings before interest, income taxes and noncontrolling interest (“EBIT") adjusted for restructuring, goodwill impairment charges, affiliates' earnings and other items not reflective of on-going operating income or loss.

Adjusted EBIT is the measure of segment income or loss used by the Company. The Company believes Adjusted EBIT is most reflective of the operational profitability or loss of our reporting segments. The following tables show segment information and Adjusted EBIT for the Company's reporting segments.

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

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

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.