Derivative Instruments Fair Value of Derivative Contracts (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Derivative Assets Reported	$ 169	$ 44
Derivative Liabilities Reported	73	151
Total fair value of derivative instruments	96	(107)
Derivative liability offset against collateral	61
Net derivative liabilities	2
Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Derivative asset offset against collateral	60
Foreign Exchange Contract \| Other Current Assets
Derivatives, Fair Value [Line Items]
Net derivative assets	108
Foreign Exchange Contract \| Not Designated as Hedging Instrument \| Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Assets Reported	46	29
Foreign Exchange Contract \| Not Designated as Hedging Instrument \| Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities Reported	45	30
Cash Flow Hedging \| Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Assets Reported	123	15
Cash Flow Hedging \| Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities Reported	18	121
Fair Value Hedging \| Interest Rate Contract \| Designated as Hedging Instrument \| Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities Reported	$ 10

Fair value, after the effects of master netting arrangements, of a financial asset or other 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 assets not subject to a master netting arrangement and not elected to be offset.

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Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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Fair value, before effects of master netting arrangements, of a financial asset or other 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 assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, after effects of master netting arrangements, of financial asset or other 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 offset against an obligation to return collateral. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, before 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 elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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

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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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