Financial Services Finance Receivables - Aging (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Financing Receivables, Aging [Line Items]
Number Of Days After Which Finance Receivable Is Considered Past Due	31 days
Financing Receivable, Gross	$ 95,642	$ 91,064	$ 85,564
Consumer [Member]
Financing Receivables, Aging [Line Items]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	24	16
Financing Receivable, Recorded Investment, Past Due	839	881
Financing Receivable, Recorded Investment, Current	64,270	59,068
Financing Receivable, Gross	65,109	59,949	59,124
Consumer [Member] \| Financing Receivables, 31 to 60 Days Past due [Member]
Financing Receivables, Aging [Line Items]
Financing Receivable, Recorded Investment, Past Due	652	708
Consumer [Member] \| Financing Receivables, 61 to 90 Days Past due [Member]
Financing Receivables, Aging [Line Items]
Financing Receivable, Recorded Investment, Past Due	112	108
Consumer [Member] \| Financing Receivables, 91 to 120 Days Past due [Member]
Financing Receivables, Aging [Line Items]
Financing Receivable, Recorded Investment, Past Due	36	27
Consumer [Member] \| Financing Receivables, Greater than 120 Days Past due [Member]
Financing Receivables, Aging [Line Items]
Financing Receivable, Recorded Investment, Past Due	39	38
Non-consumer [Member]
Financing Receivables, Aging [Line Items]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	1
Financing Receivable, Recorded Investment, Past Due	71	116
Financing Receivable, Recorded Investment, Current	30,462	30,999
Financing Receivable, Gross	$ 30,533	$ 31,115	$ 26,440

Threshold Period For Past Due Finance Receivables

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- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5111-111524

+ Details

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- Definition

Financing receivables that are current.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953401-111524

+ Details

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- Definition

Recorded Investment in financing receivables that are past due at the balance sheet date.

+ References

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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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

+ Details

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- Details

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