Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Net sales	$ 2,329.2	$ 2,031.9	$ 4,597.8	$ 4,016.1
Cost of sales	1,832.5	1,602.9	3,636.8	3,158.1
Gross profit	496.7	429.0	961.0	858.0
Selling, general and administrative expenses	202.3	167.4	390.7	335.6
Other expense, net	25.0	19.1	36.7	20.3
Operating income	269.4	242.5	533.6	502.1
Equity in affiliates’ earnings, net of tax	(10.1)	(11.1)	(19.2)	(19.6)
Interest income	(1.5)	(1.6)	(3.1)	(3.3)
Interest expense and finance charges	21.4	17.6	42.7	27.6
Earnings before income taxes and noncontrolling interest	259.6	237.6	513.2	497.4
Provision for income taxes	84.2	80.2	164.6	152.3
Net earnings	175.4	157.4	348.6	345.1
Net earnings attributable to the noncontrolling interest, net of tax	11.0	9.3	20.1	18.1
Net earnings attributable to BorgWarner Inc.	$ 164.4	$ 148.1	$ 328.5	$ 327.0
Earnings per share — basic	$ 0.76	$ 0.66	$ 1.52	$ 1.45
Earnings per share — diluted	$ 0.76	$ 0.65	$ 1.51	$ 1.44
Weighted average shares outstanding (thousands):
Basic	215,735	225,353	216,562	225,575
Diluted	216,663	226,615	217,401	226,852
Dividends declared per share	$ 0.13	$ 0.13	$ 0.26	$ 0.26