Balance Sheet Offsetting (Details) (Foreign Exchange Contract [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Foreign Exchange Contract [Member]
Offsetting Derivative Assets [Abstract]
Gross Amounts Recognized	$ 101	$ 153
Derivative Asset, Fair Value, Gross Liability	0	0
Net Amounts Presented in the Condensed Consolidated Balance Sheet	101	153
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments, Assets	(24)	(52)
Derivative, Collateral, Obligation to Return Cash	(66)	(79)
Net Amount	11	22
Offsetting Derivative Liabilities [Abstract]
Gross Amounts Recognized	92	116
Derivative Liability, Fair Value, Gross Asset	0	0
Net Amounts Presented in the Condensed Consolidated Balance Sheet	92	116
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments, Liabilities	(24)	(52)
Derivative, Collateral, Right to Reclaim Cash	(52)	(47)
Net Amount	$ 16	$ 17

Derivative assets qualified for offset but not offset on balance sheet

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Derivative liabilities qualified for offset but not offset on balance sheet

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Fair value of liability associated with 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.

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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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Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets.

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Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.

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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.

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Fair value 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.

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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 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 of asset associated with 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.

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