v2.4.0.6

Finance Receivables, Net Delinquency (Details) (Consumer Loans Auto Financing Receivable [Member], GM Financial [Member], USD $) In Millions, unless otherwise specified | Jun. 30, 2012 | Jun. 30, 2011
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Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due | $ 611 | $ 579
Percent of Contractual Amount Due | 5.90% | 6.40%
Delinquent Contract Not Yet in Repossession [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due | 586 | 556
Percent of Contractual Amount Due | 5.60% | 6.10%
Delinquent Contract Not Yet in Repossession [Member] | 31-to-60 days [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due | 428 | 398
Percent of Contractual Amount Due | 4.10% | 4.40%
Delinquent Contract Not Yet in Repossession [Member] | Greater-than-60 Days [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due | 158 | 158
Percent of Contractual Amount Due | 1.50% | 1.70%
Delinquent Contract in Repossession [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due | $ 25 | $ 23
Percent of Contractual Amount Due | 0.30% | 0.30%

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- Definition Delinquent accounts to contractual amount due, as a percentage + References No definition available. + Details
Name: | gm_PercentOfContractualAmountDue
Namespace Prefix: | gm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + 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=6965416&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration