Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]
Net sales	$ 2,197.0	$ 1,893.9	$ 4,281.1	$ 3,745.0
Cost of sales	1,724.2	1,497.3	3,362.5	2,973.7
Gross profit	472.8	396.6	918.6	771.3
Selling, general and administrative expenses	181.2	155.6	355.0	314.9
Other expense (income), net	11.0	(2.4)	49.8	14.5
Operating income	280.6	243.4	513.8	441.9
Equity in affiliates’ earnings, net of tax	(12.2)	(11.1)	(21.0)	(20.8)
Interest income	(1.4)	(1.0)	(2.9)	(2.0)
Interest expense and finance charges	9.0	8.8	17.2	18.5
Earnings before income taxes and noncontrolling interest	285.2	246.7	520.5	446.2
Provision for income taxes	85.3	66.6	153.4	117.5
Net earnings	199.9	180.1	367.1	328.7
Net earnings attributable to the noncontrolling interest, net of tax	9.7	6.0	17.8	12.6
Net earnings attributable to BorgWarner Inc.	$ 190.2	$ 174.1	$ 349.3	$ 316.1
Earnings per share — basic	$ 0.84	$ 0.76	$ 1.54	$ 1.37
Earnings per share — diluted	$ 0.83	$ 0.75	$ 1.52	$ 1.36
Weighted average shares outstanding:
Basic	227,678	229,496	227,554	229,934
Diluted	229,670	232,202	229,499	232,666
Dividends declared per share	$ 0.125	$ 0	$ 0.25	$ 0.000