Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Net sales	$ 1,884.0	$ 2,032.1	$ 5,900.1	$ 6,313.2
Cost of sales	1,485.8	1,607.6	4,643.9	4,970.1
Gross profit	398.2	424.5	1,256.2	1,343.1
Selling, general and administrative expenses	148.0	174.5	483.6	529.5
Other expense, net	13.1	12.3	33.4	62.1
Operating income	237.1	237.7	739.2	751.5
Equity in affiliates’ earnings, net of tax	(8.7)	(14.8)	(28.3)	(35.8)
Interest income	(2.0)	(1.4)	(5.3)	(4.3)
Interest expense and finance charges	15.0	9.0	42.6	26.2
Earnings before income taxes and noncontrolling interest	232.8	244.9	730.2	765.4
Provision for income taxes	66.9	71.9	219.2	225.3
Net earnings	165.9	173.0	511.0	540.1
Net earnings attributable to the noncontrolling interest, net of tax	8.5	6.4	26.6	24.2
Net earnings attributable to BorgWarner Inc.	$ 157.4	$ 166.6	$ 484.4	$ 515.9
Earnings per share — basic	$ 0.70	$ 0.73	$ 2.15	$ 2.27
Earnings per share — diluted	$ 0.70	$ 0.73	$ 2.14	$ 2.25
Weighted average shares outstanding (thousands):
Basic	224,837	227,077	225,329	227,395
Diluted	225,991	228,668	226,565	229,222
Dividends declared per share	$ 0.13	$ 0.13	$ 0.39	$ 0.38