Derivative Financial Instruments and Hedging Activities Counterparty Risk and Collateral (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Automotive [Member]
Derivative [Line Items]
Fair Value of Assets	$ 517	$ 580
Fair Value of Liabilities	713	418
Fair value of assets not offset but are eligible for offsetting	463	359
Fair value of liabilities not offset but are eligible for offsetting	463	359
Net Amount	54	221
Net Amount	250	59
Financial Services [Member]
Derivative [Line Items]
Fair Value of Assets	859	585
Fair Value of Liabilities	167	506
Fair value of assets not offset but are eligible for offsetting	136	296
Fair value of liabilities not offset but are eligible for offsetting	136	296
Net Amount	723	289
Net Amount	$ 31	$ 210

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 value, after offset of derivative liability, 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, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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- Definition

Fair value, after offset of derivative asset, 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 and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References+ Details

- Definition

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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