Securitizations Securitization Acitivity (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Securtizations [Line Items]
Leases Serviced by Canadian Subsidiary	$ 900,000,000
GM Financial [Member]
Securtizations [Line Items]
Receivables Securitized	1,916,000,000	849,000,000
Proceeds from Securitizations of Consumer Loans	1,800,000,000	800,000,000
Contractually Specified Servicing Fees, Amount	59,000,000	49,000,000
Net distributions from Trusts	451,000,000	143,000,000
Finance Receivables Transferred to Securitization Special Purpose Entities	$ 8,500,000,000		$ 7,900,000,000

All amounts that, per contract, are due to the servicer in exchange for servicing the financial asset and would no longer be received by a servicer if the beneficial owners of the serviced assets (or their trustees or agents) were to exercise their actual or potential authority under the contract to shift the servicing to another servicer. Depending on the servicing contract, those fees may include some or all of the difference between the interest rate collected on the asset being serviced and the rate to be paid to the beneficial owners of the asset.

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