Stockholders' Equity (Components Of Other Comprehensive Income) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Equity [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	$ 1	$ (18)	$ (16)	$ (20)
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	1	0	1	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	1	(2)	3	(1)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	0	0	(1)	0
Net income	184	192	318	222
Currency translation adjustments (net of tax of $(24) and $0, respectively)	(34)	(79)	(118)	(71)
Net unrealized gain (loss) on available-for-sale securities (net of tax of $0 and $0, respectively)	(1)	0	(2)	1
Net unrealized gain (loss) on cash flow hedges (net of tax of $2 and $0, respectively)	(1)	3	(4)	1
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	2	0	4	1
Other comprehensive income (loss)	(34)	(76)	(120)	(68)
Total comprehensive income (loss)	$ 150	$ 116	$ 198	$ 154