GM Financial Finance Receivables, Net Deliquency (Details) (Consumer Loans Auto Financing Receivable [Member], GM Financial [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 933	$ 726
Percent of Contractual Amount Due	8.50%	7.50%
Delinquent Contract Not Yet in Repossession [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	902	699
Percent of Contractual Amount Due	8.20%	7.20%
Delinquent Contract in Repossession [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	31	27
Percent of Contractual Amount Due	0.30%	0.30%
31-to-60 days [Member] | Delinquent Contract Not Yet in Repossession [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	672	517
Percent of Contractual Amount Due	6.10%	5.30%
Greater-than-60 Days [Member] | Delinquent Contract Not Yet in Repossession [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 230	$ 182
Percent of Contractual Amount Due	2.10%	1.90%