Foreign Currency Sale Contracts (Detail) (Foreign Exchange Contract, European Joint Venture) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2013 EUR (€)
Derivative [Line Items]
Transaction Date Range	May 2008-January 2013
Total transaction amount	$ 163		€ 120
Forward purchase date range	May 2014-January 2016
Change in fair value gain (loss)	$ (5)	$ 4