Stockholders' Equity (Components Of Other Comprehensive Income) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Equity [Abstract]
Net income (loss)	$ 4	$ (46)
Currency translation adjustments	3	(23)
Net unrealized loss on available-for-sale securities	(1)	0
Net unrealized gain on cash flow hedges (a)	1	0
Other comprehensive income (loss)	3	(23)
Total comprehensive income (loss)	7	(69)
Net unrealized gain (losses) on cash flow hedges, before tax	$ 1