Financial Instruments - Effect of Interest Rate and Cross Currency Swaps on Results of Operations (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Cross Currency Swap (Income Taxes and Other Liabilities) [Member] | Other Operating Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in Operations on Derivatives	$ 9
Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in OCI on Derivatives, Net of Tax	6
Interest Rate Swaps [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Reclassified from Accumulated OCI into Operations	$ 97