Reporting Segments (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Net Sales by Reporting Segment

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2018			2017			2018			2017
Engine	$	1,515.8		$	1,506.4		$	4,906.2		$	4,483.6
Drivetrain	976.7			921.8			3,093.7			2,767.7
Inter-segment eliminations	(14.0		)	(12.0		)	(43.1		)	(38.4		)
Net sales	$	2,478.5		$	2,416.2		$	7,956.8		$	7,212.9

Segment Earnings Before Interest and Income Taxes

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2018			2017			2018			2017
Engine	$	238.2		$	237.6		$	797.2		$	727.1
Drivetrain	107.6			111.1			344.9			324.7
Adjusted EBIT	345.8			348.7			1,142.1			1,051.8
Restructuring expense	5.7			13.3			44.4			13.3
Merger, acquisition and divestiture expense	1.6			6.4			4.8			6.4
Lease termination settlement	—			—			—			5.3
Other expense (income), net	1.5			2.7			(3.3		)	2.7
Other postretirement income	(2.4		)	(1.3		)	(7.4		)	(3.9		)
Corporate, including equity in affiliates' earnings and stock-based compensation	43.8			37.3			133.5			121.4
Interest income	(1.5		)	(1.3		)	(4.4		)	(4.2		)
Interest expense and finance charges	14.4			17.6			45.4			53.6
Earnings before income taxes and noncontrolling interest	282.7			274.0			929.1			857.2
Provision for income taxes	66.8			79.4			192.1			241.9
Net earnings	215.9			194.6			737.0			615.3
Net earnings attributable to the noncontrolling interest, net of tax	12.1			9.7			36.3			29.2
Net earnings attributable to BorgWarner Inc.	$	203.8		$	184.9		$	700.7		$	586.1

Segment assets

	September 30,		December 31,
(in millions)	2018		2017
Engine	$	4,757.7	$	4,732.9
Drivetrain	3,821.9		3,903.8
Total	8,579.6		8,636.7
Corporate *	1,136.8		1,150.9
Total assets	$	9,716.4	$	9,787.6

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