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GM Financial Receivables Retail Finance Receivables Delinquencies and TDRs (Details) - Retail Finance Receivables [Member] - GM Financial [Member] - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Retail finance receivables, nonaccrual status	$ 758		$ 778
Finance Receivables classified as TDRs	1,700		1,600
Allowance for Loan Losses - Finance Receivables classified as TDRs	244		$ 220
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 1,586	$ 1,560
Percent of Contractual Amount Due	5.10%	5.40%
31 to 60 Days Delinquent [Member]
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 1,070	$ 1,062
Percent of Contractual Amount Due	3.40%	3.60%
Greater than 60 Days Delinquent [Member]
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 465	$ 452
Percent of Contractual Amount Due	1.50%	1.60%
Total Finance Receivables more than 30 Days Delinquent [Member]
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 1,535	$ 1,514
Percent of Contractual Amount Due	4.90%	5.20%
In Repossession [Member]
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 51	$ 46
Percent of Contractual Amount Due	0.20%	0.20%
North America [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Percentage of Sub-Prime Loans	55.00%		60.00%
Sub-prime FICO Score	620		620

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- Definition

Sub-prime loans as percentage of the total loans.

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The FICO score used to separate sub-prime from prime loans. The loans with a borrower that has less then this score will be considered as sub-prime.

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- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

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- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

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Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 310
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524

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Recorded Investment in financing receivables that are past due at the balance sheet date.

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-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

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