v2.4.0.6

Finance Receivables, Net Credit Quality (Details) (Consumer Loans Auto Financing Receivable [Member], GM Financial [Member], USD $) In Millions, unless otherwise specified | Jun. 30, 2012 | Dec. 31, 2011
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Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables, Carrying Value | $ 10,440 | $ 9,680
FICO Scores Less Than 540 [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables, Carrying Value | 2,631 | 2,133
FICO score 540 to 599 [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables, Carrying Value | 4,632 | 4,167
FICO score 600 to 659 [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables, Carrying Value | 2,582 | 2,624
FICO score greater than 660 [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables, Carrying Value | $ 595 | $ 756

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- Definition Finance Receivables, Carrying Value + References No definition available. + Details
Name: | gm_FinanceReceivablesCarryingValue
Namespace Prefix: | gm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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