Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2018

The components of accumulated other comprehensive income (loss) are as follows (in millions):


				Derivative			Defined
	Currency			Financial			Benefit
	Translation			Instruments,			Plans,
	Adjustments			Net of Tax			Net of Tax			Total
Balance at December 31, 2017	$	(1,104	)	$	7		$	(13	)	$	(1,110	)
Accumulated other comprehensive income (loss) before reclassifications		36			16			—			52
Amounts reclassified from accumulated other comprehensive income (loss)		—			(3	)		—			(3	)

Balance at March 31, 2018	$	(1,068	)	$	20		$	(13	)	$	(1,061	)

The components of amounts reclassified from accumulated other comprehensive income (loss) are as follows (in millions):


	Three Months Ended March 31,
	2018										2017
	Currency Translation Adjustments		Derivative Financial Instruments			Defined Benefit Plans		Total			Currency Translation Adjustments		Derivative Financial Instruments			Defined Benefit Plans		Total
Revenue	$	—	$	(1	)	$	—	$	(1	)	$	—	$	(5	)	$	—	$	(5	)
Cost of revenue		—		(4	)		—		(4	)		—		(4	)		—		(4	)
Tax effect		—		2			—		2			—		4			—		4

	$	—	$	(3	)	$	—	$	(3	)	$	—	$	(5	)	$	—	$	(5	)