Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2011

Statement of Income and Comprehensive Income [Abstract]

Schedule of Comprehensive Income (Loss)

The following table summarizes the components of comprehensive income (loss) on an after-tax basis for the three and nine months ended September 30, 2011 and 2010:

	Three Months Ended September 30,						Nine Months Ended September 30,
(millions of dollars)	2011			2010			2011			2010
Foreign currency translation adjustments	$	(147.5	)	$	175.7		$	(16.2	)	$	(39.5	)
Market value change in hedge instruments	(3.1		)	(21.9		)	(13.7		)	(11.8		)
Unrealized gain on available-for-sale securities	—			—			0.2			—
Defined benefit post employment plans	3.8			—			(0.2		)	—
Change in accumulated other comprehensive income (loss)	(146.8		)	153.8			(29.9		)	(51.3		)
Net earnings attributable to BorgWarner Inc.	141.6			106.7			428.1			265.7
Comprehensive income (loss)	(5.2		)	260.5			398.2			214.4
Comprehensive income (loss) attributable to the noncontrolling interest	(4.1		)	0.1			(1.4		)	(2.8		)
Comprehensive income (loss) attributable to BorgWarner Inc.	$	(9.3	)	$	260.6		$	396.8		$	211.6