Finance Receivables - Credit Quality (Details) (Financial Services [Member], USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Finance Receivable Credit Quality [Abstract]
Financing Receivable By Credit Quality Indicator	86,462,000,000us-gaap_NotesReceivableGross	$ 81,173,000,000us-gaap_NotesReceivableGross
Finance Receivables Net Not Subject To Fair Value	1,700,000,000	1,700,000,000
Non-consumer [Member]
Impaired Financing Receivable Recorded Investment, Percentage of Receivable	0.30%	0.20%
Finance Receivable Credit Quality [Abstract]
Financing Receivable By Credit Quality Indicator	32,366,000,000	30,976,000,000
Consumer [Member]
Impaired Financing Receivable Recorded Investment, Percentage of Receivable	0.80%	0.90%
Finance Receivable Credit Quality [Abstract]
Financing Receivable By Credit Quality Indicator	54,096,000,000	50,197,000,000
Wholesale and Dealer Loans [Member] \| Non-consumer [Member]
Finance Receivable Credit Quality [Abstract]
Financing Receivable By Credit Quality Indicator	31,340,000,000	29,905,000,000
Pass [Member] \| Consumer [Member]
Credit quality ratings
Term, in days, for credit quality rating	current to 60 days past due
Substandard [Member] \| Consumer [Member]
Credit quality ratings
Term, in days, for credit quality rating	greater than 120 days past due
Special Mention [Member] \| Consumer [Member] \| Minimum [Member]
Credit quality ratings
Finance Receivables Credit Quality Ratings Term Range	61 days
Special Mention [Member] \| Consumer [Member] \| Maximum [Member]
Credit quality ratings
Finance Receivables Credit Quality Ratings Term Range	120 days
Group I \| Wholesale and Dealer Loans [Member] \| Non-consumer [Member]
Finance Receivable Credit Quality [Abstract]
Financing Receivable By Credit Quality Indicator	23,125,000,000	23,408,000,000
Group II \| Wholesale and Dealer Loans [Member] \| Non-consumer [Member]
Finance Receivable Credit Quality [Abstract]
Financing Receivable By Credit Quality Indicator	6,350,000,000	5,381,000,000
Group III \| Wholesale and Dealer Loans [Member] \| Non-consumer [Member]
Finance Receivable Credit Quality [Abstract]
Financing Receivable By Credit Quality Indicator	1,783,000,000	1,073,000,000
Group IV \| Wholesale and Dealer Loans [Member] \| Non-consumer [Member]
Finance Receivable Credit Quality [Abstract]
Financing Receivable By Credit Quality Indicator	82,000,000	$ 43,000,000

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- Definition

The period (days or months) established by the entity in categorizing the rating utilized as part of the credit quality ratings for its finance receivables.

+ References

No definition available.

+ Details

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The range of period (days or months) established by the entity in categorizing the rating utilized as part of the credit quality ratings for its finance receivables.

+ References

No definition available.

+ Details

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- Definition

The portion of the net aggregate finance receivables that are not subject to fair value.

+ References

No definition available.

+ Details

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- Definition

Amount of impaired outstanding recorded investment related to financing receivables as a percentage of outstanding recorded investment.

+ References

No definition available.

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- Definition

Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10(3))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Subparagraph 3

-Article 9

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