Consolidated Statements Of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax	$ 1	$ 0	$ 0	$ 1
Unrealized gains (losses), tax	(8)	0	(8)	(1)
Reclassification adjustment for losses (gains) included in other income (expense), net, tax	$ 0	$ 0	$ (1)	$ 0