Stockholders' Equity (Components Of Other Comprehensive Income) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Equity [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	$ (5)	$ 7	$ 4	$ (17)
Net income (loss)	36	143	(15)	134
Currency translation adjustments (net of tax of $(24) and $0, respectively)	8	8	80	(84)
Net unrealized gain (loss) on available-for-sale securities (net of tax of $0 and $0, respectively)	0	(1)	0	(1)
Net unrealized gain (loss) on cash flow hedges (net of tax of $2 and $0, respectively)	(5)	0	(8)	(3)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	1	1	2	2
Other comprehensive income (loss)	4	8	74	(86)
Total comprehensive income (loss)	40	151	59	48
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	0	0	0	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	3	0	5	2
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	$ (1)	$ (1)	$ (1)	$ (1)