Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2018

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of accumulated other comprehensive income (loss)

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

	For the Nine Months Ended September 30, 2018
	Foreign currency translation adjustments			Unrealized gain (loss) on forward contracts			Unrealized gain (loss) on available-for-sale securities		Total
Balance at December 31, 2017	$	(623	)	$	(15	)	$	—	$	(638	)
Cumulative impact from adoption of new revenue accounting standard	3			—			—		3
Other comprehensive income (loss) before reclassifications	(7		)	14			4		11
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	—			11			—		11
Balance at September 30, 2018	$	(627	)	$	10		$	4	$	(613	)

	For the Nine Months Ended September 30, 2017
	Foreign currency translation adjustments			Unrealized gain (loss) on forward contracts			Unrealized gain (loss) on available-for-sale securities			Total
Balance at December 31, 2016	$	(659	)	$	29		$	1		$	(629	)
Other comprehensive income (loss) before reclassifications	20			(38		)	(2		)	(20		)
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	16			(7		)	(2		)	7
Balance at September 30, 2017	$	(623	)	$	(16	)	$	(3	)	$	(642	)