Derivative Financial Instruments and Hedging Activities Income Effect of Derivative Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Derivative [Line Items]
Maximum Length of Time Hedged in Cash Flow Hedge	2 years
Automotive [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member] \| Foreign currency exchange contracts [Member]
Derivative [Line Items]
Gain/(Loss) Recorded in OCI	$ 130	$ 55
Gain/(Loss) Reclassified from AOCI to Income	68	(72)
Gain/(Loss) Recognized in Income	0	(3)
Automotive [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Income	(56)	(30)
Automotive [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign currency exchange contracts [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Income	(44)	12
Automotive [Member] \| Not Designated as Hedging Instrument [Member] \| Commodity Contract [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Income	(12)	(42)
Financial Services [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	105	(91)
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(100)	85
Financial Services [Member] \| Designated as Hedging Instrument [Member] \| Fair Value Hedging [Member] \| Interest rate contracts [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Income	74	55
Net interest settlements and accruals excluded from the assessment of hedge effectiveness	69	61
Ineffectiveness	5	(6)
Financial Services [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Income	(28)	220
Financial Services [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign currency exchange contracts [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Income	(5)	81
Financial Services [Member] \| Not Designated as Hedging Instrument [Member] \| Interest rate contracts [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Income	(18)	1
Financial Services [Member] \| Not Designated as Hedging Instrument [Member] \| Cross-currency interest rate swap contracts [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Income	$ (5)	$ 138

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 25

-Section 50

-Paragraph 1

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

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- Definition

Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959

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-Publisher FASB

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-Subparagraph (a),(c),(d),(e)

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- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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- Definition

The net gain (loss) included in earnings for the period relating to components of the gain (loss) on interest rate fair value hedging instruments excluded from the assessment of fair value hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 25

-Section 50

-Paragraph 1

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

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- Definition

The net gain (loss) recognized in earnings during the period due to the ineffectiveness on interest rate fair value hedges.

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- Definition

Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (d)

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