Allowance for Credit Losses (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Analysis of ending balance of finance receivables and net investment in operating leases
Finance receivables, net	$ 81,111us-gaap_NotesReceivableNet	$ 77,481us-gaap_NotesReceivableNet
Allowance For Credit Losses Policy [Abstract]
Term When Finance Receivables Are Considered Impaired	120 days
Term to Charge Off Finance Receivables	120 days
Financial Services [Member]
Allowance for credit losses
Beginning balance	357	389
Charge-offs	(300)	(304)
Recoveries	140	149
Provision for credit losses	133	(124)
Other	(9)	(1)
Ending balance	321	357
Ending balance (including reserves for operating leases)	359	380
Analysis of ending balance of allowance for credit losses
Collective impairment allowance	298	332
Specific impairment allowance	23	25
Ending balance	321	357
Ending balance (including reserves for operating leases)	359	380
Analysis of ending balance of finance receivables and net investment in operating leases
Collectively evaluated for impairment	85,942	80,667
Specifically evaluated for impairment	520	506
Financing Receivable, Gross	86,462	81,173
Finance receivables, net	86,141	80,816
Allowance For Credit Losses Policy [Abstract]
Number Of Days At Which Finance Receivables Impaired	when an account is deemed to be uncollectible or when an account is 120 days delinquent
Financial Services [Member] \| Consumer [Member]
Allowance for credit losses
Beginning balance	327	360
Charge-offs	(294)	(289)
Recoveries	131	144
Provision for credit losses	150	(112)
Other	(9)	0
Ending balance	305	327
Analysis of ending balance of allowance for credit losses
Collective impairment allowance	282	304
Specific impairment allowance	23	23
Ending balance	305	327
Analysis of ending balance of finance receivables and net investment in operating leases
Collectively evaluated for impairment	53,681	49,762
Specifically evaluated for impairment	415	435
Financing Receivable, Gross	54,096	50,197
Finance receivables, net	53,791	49,870
Allowance For Credit Losses Policy [Abstract]
Number Of Days At Which Finance Receivables Are Charged Off	greater than 120 days past due
Financial Services [Member] \| Non-consumer [Member]
Allowance for credit losses
Beginning balance	30	29
Charge-offs	(6)	(15)
Recoveries	9	5
Provision for credit losses	(17)	(12)
Other	0	(1)
Ending balance	16	30
Analysis of ending balance of allowance for credit losses
Collective impairment allowance	16	28
Specific impairment allowance	0	2
Ending balance	16	30
Analysis of ending balance of finance receivables and net investment in operating leases
Collectively evaluated for impairment	32,261	30,905
Specifically evaluated for impairment	105	71
Financing Receivable, Gross	32,366	30,976
Finance receivables, net	$ 32,350	$ 30,946

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Financing And Loans And Leases Receivable Allowance

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No definition available.

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- Definition

Reflects other additions and reductions to the finance receivable allowance, which are not reflected elsewhere or separately disclosed.

+ References

No definition available.

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- Definition

The number of days at which finance receivables are charged-off.

+ References

No definition available.

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The number of days at which finance receivables are considered to be impaired.

+ References

No definition available.

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Term to Charge Off Finance Receivables

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No definition available.

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Term When Finance Receivables Are Considered Impaired

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No definition available.

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

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- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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-Paragraph 11B

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

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- Definition

The balance of financing receivables that were collectively evaluated for impairment.

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

The balance of financing receivables that were individually evaluated for impairment.

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-Publisher FASB

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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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10(3))

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-Name Regulation S-X (SX)

-Number 210

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- Definition

Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

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-Name Accounting Standards Codification

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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