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Financial Instruments - Carrying Amounts and Estimated Fair Values of Company's Long-Term Debt and Foreign Currency Forward Contracts (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets And Liabilities Carrying Value And Fair Value [Line Items]
Senior Notes, Carrying Amount	$ 2,941	$ 2,940
CODES, Carrying Amount	689	689
Senior Notes, Estimated Fair Value	3,121	3,301
CODES, Estimated Fair Value	830	697
Estimated Fair Value [Member]
Assets And Liabilities Carrying Value And Fair Value [Line Items]
Foreign currency forward contracts	1	5
Carrying Amount [Member]
Assets And Liabilities Carrying Value And Fair Value [Line Items]
Foreign currency forward contracts	$ 1	$ 5

Including the current and noncurrent portions, the carrying value of convertible subordinated debt, as of the balance sheet date, initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. This form of debt can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder, and places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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