Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Net sales	$ 2,031.9	$ 2,197.0	$ 4,016.1	$ 4,281.1
Cost of sales	1,602.9	1,724.2	3,158.1	3,362.5
Gross profit	429.0	472.8	858.0	918.6
Selling, general and administrative expenses	167.4	181.2	335.6	355.0
Other expense, net	19.1	11.0	20.3	49.8
Operating income	242.5	280.6	502.1	513.8
Equity in affiliates’ earnings, net of tax	(11.1)	(12.2)	(19.6)	(21.0)
Interest income	(1.6)	(1.4)	(3.3)	(2.9)
Interest expense and finance charges	17.6	9.0	27.6	17.2
Earnings before income taxes and noncontrolling interest	237.6	285.2	497.4	520.5
Provision for income taxes	80.2	85.3	152.3	153.4
Net earnings	157.4	199.9	345.1	367.1
Net earnings attributable to the noncontrolling interest, net of tax	9.3	9.7	18.1	17.8
Net earnings attributable to BorgWarner Inc.	$ 148.1	$ 190.2	$ 327.0	$ 349.3
Earnings per share — basic	$ 0.66	$ 0.84	$ 1.45	$ 1.54
Earnings per share — diluted	$ 0.65	$ 0.83	$ 1.44	$ 1.52
Weighted average shares outstanding (thousands):
Basic	225,353	227,678	225,575	227,554
Diluted	226,615	229,670	226,852	229,499
Dividends declared per share	$ 0.13	$ 0.125	$ 0.26	$ 0.25