Reporting Segments (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Net Sales by Reporting Segment

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2017			2016			2017			2016
Engine	$	1,506.4		$	1,359.3		$	4,483.6		$	4,202.7
Drivetrain	921.8			865.9			2,767.7			2,640.5
Inter-segment eliminations	(12.0		)	(11.0		)	(38.4		)	(31.2		)
Net sales	$	2,416.2		$	2,214.2		$	7,212.9		$	6,812.0

Segment Earnings Before Interest and Income Taxes

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2017			2016			2017			2016
Engine	$	238.5		$	221.5		$	729.8		$	696.3
Drivetrain	111.5			89.4			325.9			271.0
Adjusted EBIT	350.0			310.9			1,055.7			967.3
Restructuring expense	13.3			1.3			13.3			26.9
Merger and acquisition expense	6.4			5.9			6.4			18.9
Lease termination settlement	—			—			5.3			—
Other expense, net	2.7			—			2.7			—
Asset impairment expense	—			106.5			—			106.5
Contract expiration loss (gain)	—			1.3			—			(6.2		)
Corporate, including equity in affiliates' earnings and stock-based compensation	37.3			33.2			121.4			105.7
Interest income	(1.3		)	(1.6		)	(4.2		)	(4.7		)
Interest expense and finance charges	17.6			22.4			53.6			65.1
Earnings before income taxes and noncontrolling interest	274.0			141.9			857.2			655.1
Provision for income taxes	79.4			48.8			241.9			213.4
Net earnings	194.6			93.1			615.3			441.7
Net earnings attributable to the noncontrolling interest, net of tax	9.7			9.8			29.2			29.9
Net earnings attributable to BorgWarner Inc.	$	184.9		$	83.3		$	586.1		$	411.8

Segment assets

	September 30,		December 31,
(in millions)	2017		2016
Engine	$	4,607.0	$	4,134.6
Drivetrain	3,748.8		3,212.4
Total	8,355.8		7,347.0
Corporate *	1,460.4		1,487.7
Total assets	$	9,816.2	$	8,834.7

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