Balance Sheet Effect of Derivative Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Automotive [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	$ 30,947	$ 28,325
Fair Value of Assets	1,102	517
Fair Value of Liabilities	1,266	713
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(952)	(463)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	(952)	(463)
Derivative Asset	150	54
Derivative Liability	314	250
Automotive [Member] \| Foreign currency exchange contracts [Member] \| Not Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	16,317	12,198
Fair Value of Assets	378	157
Fair Value of Liabilities	266	129
Automotive [Member] \| Commodity Contract [Member] \| Not Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	656	693
Fair Value of Assets	5	1
Fair Value of Liabilities	51	67
Automotive [Member] \| Cash Flow Hedging [Member] \| Foreign currency exchange contracts [Member] \| Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	13,974	15,434
Fair Value of Assets	719	359
Fair Value of Liabilities	949	517
Financial Services [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	86,314	83,713
Fair Value of Assets	1,204	859
Fair Value of Liabilities	297	167
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(188)	(136)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	(188)	(136)
Derivative Asset	1,016	723
Derivative Liability	109	31
Financial Services [Member] \| Foreign currency exchange contracts [Member] \| Not Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	1,177	1,527
Fair Value of Assets	52	18
Fair Value of Liabilities	1	1
Financial Services [Member] \| Interest Rate Contract [Member] \| Not Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	59,942	56,558
Fair Value of Assets	233	168
Fair Value of Liabilities	150	89
Financial Services [Member] \| Cross-currency interest rate swap contracts [Member] \| Not Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	2,336	2,425
Fair Value of Assets	183	71
Fair Value of Liabilities	120	39
Financial Services [Member] \| Fair Value Hedging [Member] \| Interest Rate Contract [Member] \| Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	22,859	23,203
Fair Value of Assets	736	602
Fair Value of Liabilities	$ 26	$ 38

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Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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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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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 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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