Stockholders' Equity (Accumulated Other Comprehensive Income) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Currency Translation Adjustments, Balance			$ 166	$ 193
Net Unrealized Gains (Losses) on Cash Flow Hedges, Balance	(1)	1	(1)	1
Net Unrealized Gains on Available- For-Sale Securities, Balance			2	2
Currency Translation Adjustments, Balance			(52)	(85)
Accumulated Other Comprehensive Income, Balance			117	110
Currency Translation Adjustments, Current period change	5	(37)	8	(60)
Net unrealized gain (loss) on cash flow hedges	(3)	1	(2)	1
Net unrealized gains on available-for-sale securities, net of tax	2	(1)	1	(1)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(1)	0	(1)	0
Accumulated Other Comprehensive Income, Current period change	5	(37)	8	(60)
Currency Translation Adjustments, Balance	174	133	174	133
Net Unrealized Gains (Losses) on Cash Flow Hedges, Balance			1	0
Net Unrealized Gains on Available- For-Sale Securities, Balance	3	1	3	1
Currency Translation Adjustments, Balance	(51)	(85)	(51)	(85)
Accumulated Other Comprehensive Income, Balance	125	50	125	50
Derivatives used in Net Investment Hedge, Net of Tax	9		9
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	2		4
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	$ 1		$ 2