GM Financial Receivables Retail Finance Receivables Delinquencies (Details) - GM Financial [Member] - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Delinquent Contracts [Abstract]
Finance Receivables, Individually Evaluated for Impairment, net of fees	$ 1,991	$ 1,694
Allowance for Loan Losses, Individually Evaluated for Impairment	283	229	$ 177
Retail Finance Receivables [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Retail finance receivables, nonaccrual status	807	778
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 1,828	$ 1,764
Finance Receivables, Percent Past Due	5.50%	6.00%
Finance Receivables, Individually Evaluated for Impairment, net of fees	$ 1,921	$ 1,612
Allowance for Loan Losses, Individually Evaluated for Impairment	276	220
31 to 60 Days Delinquent [Member] \| Retail Finance Receivables [Member]
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 1,235	$ 1,237
Finance Receivables, Percent Past Due	3.70%	4.20%
Greater than 60 Days Delinquent [Member] \| Retail Finance Receivables [Member]
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 542	$ 481
Finance Receivables, Percent Past Due	1.70%	1.60%
Total finance receivables more than 30 Days Delinquent [Member] \| Retail Finance Receivables [Member]
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 1,777	$ 1,718
Finance Receivables, Percent Past Due	5.40%	5.80%
In Repossession [Member] \| Retail Finance Receivables [Member]
Delinquent Contracts [Abstract]
Finance Receivables, Past Due	$ 51	$ 46
Finance Receivables, Percent Past Due	0.10%	0.20%
North America [Member] \| Retail Finance Receivables [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Percentage of Sub-prime Loans	48.00%	60.00%
Sub-prime FICO Score	620	620

Sub-prime loans as percentage of the total loans.

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- Definition

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.

+ References

No definition available.

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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

+ Details

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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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- Definition

Percent of financing receivables past due.

+ References

No definition available.

+ Details

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- Definition

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
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524

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- Definition

Recorded Investment in financing receivables that are past due at 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
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953401-111524

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- References

No definition available.

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