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