Stockholders' Equity (Accumulated Other Comprehensive Income) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Currency Translation Adjustments, Balance			$ 193
Net Unrealized Gains (Losses) on Cash Flow Hedges, Balance			0
Net Unrealized Gains on Available- For-Sale Securities, Balance			2
Currency Translation Adjustments, Balance			(85)
Accumulated Other Comprehensive Income, Balance			110
Currency Translation Adjustments, Current period change	39	26	(21)	14
Net Unrealized Gains (Losses) on Cash Flow Hedges, Current period change	0	0	1	11
Available-for-sale Securities, Gross Realized Gain (Loss)				1
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax			13
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent before reclassifications			(6)
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax			6
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent			6
Net unrealized gains on available-for-sale securities, net of tax	2	2	1	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	19	0	19	0
Accumulated Other Comprehensive Income, Current period change	60	28	0	25
Currency Translation Adjustments, Balance	172		172
Net Unrealized Gains (Losses) on Cash Flow Hedges, Balance	1		1
Net Unrealized Gains on Available- For-Sale Securities, Balance	3		3
Currency Translation Adjustments, Balance	(66)		(66)
Accumulated Other Comprehensive Income, Balance	110		110
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax			$ 10