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Fair Value of Financial Instruments (Schedule of the Fair Value of Derivative Instruments in the Consolidated Balance Sheet) (Details) (Designated as Hedging Instrument [Member], Other Long-term Liabilities [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Designated as Hedging Instrument [Member] \| Other Long-term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives designated as hedging instruments	$ 73	$ 88

Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset against a right to receive collateral under a master netting arrangement.

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