BorgWarner Inc. and Consolidated Subsidiaries Consolidated Statements of Equity - USD ($) $ in Millions	Total	Issued common stock	Capital in excess of par value	Common stock held in treasury	Retained earnings	Accumulated other comprehensive income (loss)	Noncontrolling interests	Employee Stock Option [Member] Common stock held in treasury	Performance Shares [Member] Common stock held in treasury	Restricted Stock [Member] Common stock held in treasury
Beginning Balance at Dec. 31, 2012		$ 1.2	$ 1,160.7	$ (569.2)	$ 2,611.2	$ (121.3)	$ 63.5
Beginning Balance, shares at Dec. 31, 2012		246,046,318		(14,900,920)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared					(56.8)		(20.1)
Stock incentive plans			(2.9)					$ 35.9
Stock incentive plans, shares	870,000	8,200
Net issuance for executive stock plan			(33.7)						$ 44.5
Net issuance of restricted stock			(2.2)							$ (12.9)
Net issuance of restricted stock, shares		367,375
Treasury stock reissued, shares								861,866	644,638	148,485
Purchase of treasury stock				$ (225.5)
Purchases of treasury stock, shares				(5,243,106)
Net earnings attributable to BorgWarner Inc.	$ 624.3				624.3
Net earnings attributable to the noncontrolling interest, net of tax	26.7						26.7
Other comprehensive income (loss)	107.3					107.3
Comprehensive (loss) income attributable to the noncontrolling interest	$ (1.7)						1.7
Stock split		$ 1.3
Dividends, stock split					(1.3)
Adjustments to capital in excess of par value			0.0
Ending Balance at Dec. 31, 2013		$ 2.5	1,121.9	$ (727.2)	3,177.4	(14.0)	71.8
Ending Balance, shares at Dec. 31, 2013		246,421,893		(18,489,037)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared					(116.1)		(24.9)
Stock incentive plans			5.4					$ 11.5
Stock incentive plans, shares	283,000
Net issuance for executive stock plan			(13.3)						$ 24.7
Net issuance of restricted stock			(1.6)							$ (1.3)
Net issuance of restricted stock, shares		(31,273)
Treasury stock reissued, shares								283,090	336,883	326,074
Purchase of treasury stock				$ (139.9)
Purchases of treasury stock, shares				(2,417,547)
Net earnings attributable to BorgWarner Inc.	$ 655.8				655.8
Net earnings attributable to the noncontrolling interest, net of tax	31.7						31.7
Other comprehensive income (loss)	(369.6)					(369.6)
Comprehensive (loss) income attributable to the noncontrolling interest	3.9						(3.9)
Ending Balance at Dec. 31, 2014	$ 3,690.9	$ 2.5	1,112.4	$ (832.2)	3,717.1	(383.6)	74.7
Ending Balance, shares at Dec. 31, 2014		246,390,620		(19,960,537)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared					(116.7)		(28.5)
Stock incentive plans			(1.8)					$ 18.6
Stock incentive plans, shares	440,000	0
Net issuance for executive stock plan			2.4						$ 0.0
Executive stock plan, shares		0
Net issuance of restricted stock			(3.3)							$ 18.2
Net issuance of restricted stock, shares		(3,563)
Treasury stock reissued, shares								439,653	0	532,951
Purchase of treasury stock				$ 363.0
Purchases of treasury stock, shares				(8,074,303)
Net earnings attributable to BorgWarner Inc.	$ 609.7				609.7
Net earnings attributable to the noncontrolling interest, net of tax	36.7						36.7
Other comprehensive income (loss)	(226.6)					(226.6)
Comprehensive (loss) income attributable to the noncontrolling interest	5.1						(5.1)
Ending Balance at Dec. 31, 2015	$ 3,631.5	$ 2.5	$ 1,109.7	$ (1,158.4)	$ 4,210.1	$ (610.2)	$ 77.8
Ending Balance, shares at Dec. 31, 2015		246,387,057		(27,062,236)