Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Net sales	$ 2,084.1	$ 1,851.1
Cost of sales	1,638.3	1,476.4
Gross profit	445.8	374.7
Selling, general and administrative expenses	173.8	159.3
Other expense	38.8	16.9
Operating income	233.2	198.5
Equity in affiliates’ earnings, net of tax	(8.8)	(9.7)
Interest income	(1.5)	(1.0)
Interest expense and finance charges	8.2	9.7
Earnings before income taxes and noncontrolling interest	235.3	199.5
Provision for income taxes	68.1	50.9
Net earnings	167.2	148.6
Net earnings attributable to the noncontrolling interest, net of tax	8.1	6.6
Net earnings attributable to BorgWarner Inc.	$ 159.1	$ 142.0
Earnings per share — basic	$ 0.70	$ 0.62
Earnings per share — diluted	$ 0.69	$ 0.61
Weighted average shares outstanding:
Basic	227,430	230,372
Diluted	229,327	233,130
Dividends declared per share	$ 0.125	$ 0