Reporting Segments

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Reporting Segments

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 March 31,
(in millions)	2018			2017
Engine	$	1,716.1		$	1,495.4
Drivetrain	1,082.9			924.9
Inter-segment eliminations	(14.7		)	(13.3		)
Net sales	$	2,784.3		$	2,407.0

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

	Three Months Ended March 31,
(in millions)	2018			2017
Engine	$	280.2		$	246.2
Drivetrain	121.0			104.4
Adjusted EBIT	401.2			350.6
Restructuring expense	7.5			—
Merger and acquisition expense	2.2			—
Lease termination settlement	—			5.3
Other income, net	(4.8		)	—
Other postretirement income	(2.6		)	(1.2		)
Corporate, including equity in affiliates' earnings and stock-based compensation	52.6			44.1
Interest income	(1.5		)	(1.5		)
Interest expense and finance charges	16.1			18.0
Earnings before income taxes and noncontrolling interest	331.7			285.9
Provision for income taxes	94.9			86.3
Net earnings	236.8			199.6
Net earnings attributable to the noncontrolling interest, net of tax	11.7			10.4
Net earnings attributable to BorgWarner Inc.	$	225.1		$	189.2

Total Assets

	March 31,		December 31,
(in millions)	2018		2017
Engine	$	4,919.1	$	4,733.4
Drivetrain	4,025.1		3,905.3
Total	8,944.2		8,638.7
Corporate *	1,090.6		1,150.9
Total assets	$	10,034.8	$	9,789.6

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*    Corporate assets include investments and other long-term receivables and certain deferred income taxes.