Stockholders' Equity (Accumulated Other Comprehensive Income) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Currency Translation Adjustments, Balance	$ 166	$ 193
Net Unrealized Gains (Losses) on Cash Flow Hedges, Balance	2	0
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	3	(23)
Net unrealized gain on cash flow hedges (a)	1	0
Net unrealized gains on available-for-sale securities, net of tax	(1)	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	0	0
Accumulated Other Comprehensive Income, Current period change	3	(23)
Currency Translation Adjustments, Balance	169	170
Net Unrealized Gains (Losses) on Cash Flow Hedges, Balance	1	0
Net Unrealized Gains on Available- For-Sale Securities, Balance	1	2
Currency Translation Adjustments, Balance	(52)	(85)
Accumulated Other Comprehensive Income, Balance	120	87
Derivatives used in Net Investment Hedge, Net of Tax	$ 11