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Objectives and Strategies for Using Derivatives (Details) (Foreign exchange contracts, USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivative [Line Items]
Derivative liability	$ 1	$ 5
Undesignated hedging instruments
Derivative [Line Items]
Aggregate notional amount	25
Cash flow hedges
Derivative [Line Items]
Aggregate notional amount	$ 55

Fair value, after the effects of master netting arrangements, of a 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. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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