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	Share-based Payment Arrangement, Option [Member] Common stock held in treasury	Performance Shares [Member] Common stock held in treasury	Restricted Stock [Member] Common stock held in treasury
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury Stock, Common, Shares						(34,124,092)
Beginning Balance at Dec. 31, 2016				$ 3	$ 1,104	$ (1,382)	$ 4,215	$ (722)	$ 84
Beginning Balance, shares at Dec. 31, 2016				246,387,057
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared							(124)		(29)
Stock incentive plans					(11)					$ 19
Net issuance for executive stock plan					21						$ 3
Net issuance of restricted stock					4							$ 15
Treasury stock reissued, shares										473,419	73,935	402,184
Purchase of treasury stock						$ (100)
Business divestiture									0
Purchases of treasury stock, shares						(2,399,710)
Net earnings attributable to BorgWarner Inc.		$ 440					440
Net earnings attributable to the noncontrolling interest, net of tax		43							43
Other comprehensive income (loss)		232						232
Other comprehensive (loss) income attributable to the noncontrolling interest		$ 11	[1]						11
Ending Balance at Dec. 31, 2017				$ 3	1,118	$ (1,445)	4,531	(490)	109
Ending Balance, shares at Dec. 31, 2017				246,387,057
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared		$ 0.59
Treasury Stock, Common, Shares						(35,574,264)
Dividends declared							(142)		(36)
Net issuance for executive stock plan					18						$ 4
Net issuance of restricted stock					10							$ 6
Treasury stock reissued, shares											154,642	284,946
Purchase of treasury stock						$ (150)
Business divestiture		$ 0
Purchases of treasury stock, shares						(3,037,447)
Net earnings attributable to BorgWarner Inc.		931					931
Net earnings attributable to the noncontrolling interest, net of tax		54							54
Other comprehensive income (loss)		(170)						(170)
Other comprehensive (loss) income attributable to the noncontrolling interest		(8)	[1]						(8)
Ending Balance at Dec. 31, 2018		$ 4,345		$ 3	1,146	$ (1,585)	5,336	(674)	119
Ending Balance, shares at Dec. 31, 2018				246,387,057
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared		$ 0.68
Treasury Stock, Common, Shares						(38,172,123)
Dividends declared							(140)		(34)
Noncontrolling interest contributions		$ 4
Net issuance for executive stock plan					0						$ 7
Net issuance of restricted stock					(1)							$ 21
Treasury stock reissued, shares											199,135	571,996
Purchase of treasury stock						$ (100)
Purchases of treasury stock, shares						(2,578,522)
Net earnings attributable to BorgWarner Inc.		746
Net earnings attributable to the noncontrolling interest, net of tax		51							51
Other comprehensive income (loss)		(53)						(53)
Other comprehensive (loss) income attributable to the noncontrolling interest	[1]	(2)
Ending Balance at Dec. 31, 2019		$ 4,844		$ 3	$ 1,145	$ (1,657)	$ 5,942	$ (727)	$ 138
Ending Balance, shares at Dec. 31, 2019				246,387,057
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared		$ 0
Treasury Stock, Common, Shares						(39,979,514)

[1] * Net of income taxes.