BorgWarner Inc. and Consolidated Subsidiaries Statements of Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net earnings attributable to BorgWarner Inc.		$ 118.5	$ 609.7	$ 655.8
Foreign currency translation adjustments		(109.1)	(260.5)	(341.8)
Hedge instruments	[1]	7.0	(3.7)	17.7
Defined benefit postretirement plans	[1]	(8.2)	37.4	(45.8)
Other	[1]	(1.6)	0.2	0.3
Total other comprehensive (loss) income attributable to BorgWarner Inc.		(111.9)	(226.6)	(369.6)
Comprehensive income attributable to BorgWarner Inc.		6.6	383.1	286.2
Comprehensive loss attributable to the noncontrolling interest		(5.1)	(5.1)	(3.9)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest		$ 1.5	$ 378.0	$ 282.3

[1] *Net of income taxes.