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GM Financial Receivables, Net Consumer Finance Receivables Delinquencies and TDRs (Details) - Consumer Finance Receivables [Member] - GM Financial [Member] - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Consumer finance receivables, nonaccrual status $ 694 $ 682  
Delinquent Contracts [Abstract]      
Finance Receivables, Past Due $ 1,560   $ 1,314
Percent of Contractual Amount Due 5.40%   5.20%
Outstanding recorded investment $ 1,399 1,234  
Less: allowance for loan losses (203) (172)  
Outstanding recorded investment, net of allowance 1,196 1,062  
Unpaid principal balance $ 1,426 $ 1,255  
North America [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Percentage of Sub-Prime Loans 71.00% 83.00%  
Sub-prime FICO Score 620 620  
Financing Receivables, 31 to 60 Days Delinquent [Member]      
Delinquent Contracts [Abstract]      
Finance Receivables, Past Due $ 1,062   $ 886
Percent of Contractual Amount Due 3.60%   3.50%
Financing Receivables, Greater than 60 Days Delinquent [Member]      
Delinquent Contracts [Abstract]      
Finance Receivables, Past Due $ 452   $ 388
Percent of Contractual Amount Due 1.60%   1.60%
Financing Receivables, More than 30 Days Delinquent [Member]      
Delinquent Contracts [Abstract]      
Finance Receivables, Past Due $ 1,514   $ 1,274
Percent of Contractual Amount Due 5.20%   5.10%
Financing Receivables, In Repossession [Member]      
Delinquent Contracts [Abstract]      
Finance Receivables, Past Due $ 46   $ 40
Percent of Contractual Amount Due 0.20%   0.10%