v3.3.0.814

GM Financial Receivables, Net Commercial Finance Receivables Credit Quality Indicators (Details) - GM Financial [Member] - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables	$ 35,646	$ 33,229
Commercial Finance Receivables [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables	7,659	7,606
Commercial Finance Receivables [Member] | Group I Dealers [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables	1,191	1,050
Commercial Finance Receivables [Member] | Group II Dealers [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables	2,269	2,022
Commercial Finance Receivables [Member] | Group III Dealers [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables	2,498	2,599
Commercial Finance Receivables [Member] | Group IV Dealers [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables	1,088	1,173
Commercial Finance Receivables [Member] | Group V Dealers [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables	408	524
Commercial Finance Receivables [Member] | Group VI Dealers [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables	$ 205	$ 238

X

- 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

Name:	us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

Name:	us-gaap_NotesReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	gm_BusinessGroupAxis=gm_GmFinancialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=gm_GroupIDealersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=gm_GroupIIDealersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=gm_GroupIIIDealersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=gm_GroupIVDealersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=gm_GroupVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=gm_GroupVIDealersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: