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GM Financial Receivables Retail Finance Receivables Delinquencies and TDRs (Details) - Retail Finance Receivables [Member] - GM Financial [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Retail finance receivables, nonaccrual status	$ 816		$ 778
Finance Receivables classified as TDRs	1,800		1,600
Allowance for Loan Losses - Finance Receivables classified as TDRs	256		$ 220
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 1,690	$ 1,644
Financing Receivable, Percent Past Due	5.20%	5.80%
31 to 60 Days Delinquent [Member]
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 1,127	$ 1,137
Financing Receivable, Percent Past Due	3.50%	4.00%
Greater than 60 Days Delinquent [Member]
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 503	$ 454
Financing Receivable, Percent Past Due	1.50%	1.60%
Total Finance Receivables more than 30 Days Delinquent [Member]
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 1,630	$ 1,591
Financing Receivable, Percent Past Due	5.00%	5.60%
In Repossession [Member]
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 60	$ 53
Financing Receivable, Percent Past Due	0.20%	0.20%
North America [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Percentage of Sub-Prime Loans	51.00%		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
-Name Accounting Standards Codification
-Topic 310
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-Section 50
-Paragraph 7
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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.

+ References

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-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
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-Name Accounting Standards Codification
-Topic 310
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-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953401-111524

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