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GM Financial Receivables (Tables) - GM Financial [Member] | 6 Months Ended
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Jun. 30, 2017
Finance Receivables [Line Items] |
GM Financial Receivables |
| June 30, 2017 |  | December 31, 2016
| Retail |  | Commercial |  | Total |  | Retail |  | Commercial |  | Total
Finance receivables, collectively evaluated for impairment, net of fees | $ | 28,971 |  |  | $ | 9,308 |  |  | $ | 38,279 |  |  | $ | 24,480 |  |  | $ | 7,506 |  |  | $ | 31,986 |
Finance receivables, individually evaluated for impairment, net of fees | 2,012 |  |  | 35 |  |  | 2,047 |  |  | 1,920 |  |  | 27 |  |  | 1,947 |
GM Financial receivables | 30,983 |  |  | 9,343 |  |  | 40,326 |  |  | 26,400 |  |  | 7,533 |  |  | 33,933 |
Less: allowance for loan losses | (844 | ) |  | (49 | ) |  | (893 | ) |  | (765 | ) |  | (40 | ) |  | (805 | )
GM Financial receivables, net | $ | 30,139 |  |  | $ | 9,294 |  |  | $ | 39,433 |  |  | $ | 25,635 |  |  | $ | 7,493 |  |  | $ | 33,128 |
Fair value of GM Financial receivables |  |  |  |  | $ | 39,477 |  |  |  |  |  |  | $ | 33,181 |
Allowance for Loan Losses |
| Three Months Ended |  | Six Months Ended
| June 30, 2017 |  | June 30, 2016 |  | June 30, 2017 |  | June 30, 2016
Allowance for loan losses at beginning of period | $ | 867 |  |  | $ | 808 |  |  | $ | 805 |  |  | $ | 749 |
Provision for loan losses | 158 |  |  | 144 |  |  | 369 |  |  | 334 |
Charge-offs | (273 | ) |  | (258 | ) |  | (571 | ) |  | (542 | )
Recoveries | 142 |  |  | 130 |  |  | 285 |  |  | 275 |
Effect of foreign currency | (1 | ) |  | 4 |  |  | 5 |  |  | 12 |
Allowance for loan losses at end of period | $ | 893 |  |  | $ | 828 |  |  | $ | 893 |  |  | $ | 828 |
Retail Finance Receivables [Member] |
Finance Receivables [Line Items] |
Retail Finance Receivables Delinquency | The following table summarizes the contractual amount of delinquent retail finance receivables, which is not significantly different than the recorded investment of the retail finance receivables:
| June 30, 2017 |  | June 30, 2016
| Amount |  | Percent of Contractual Amount Due |  | Amount |  | Percent of Contractual Amount Due
31-to-60 days delinquent | $ | 1,076 |  |  | 3.4 | % |  | $ | 1,055 |  |  | 4.3 | %
Greater-than-60 days delinquent | 464 |  |  | 1.5 | % |  | 454 |  |  | 1.9 | %
Total finance receivables more than 30 days delinquent | 1,540 |  |  | 4.9 | % |  | 1,509 |  |  | 6.2 | %
In repossession | 43 |  |  | 0.2 | % |  | 47 |  |  | 0.2 | %
Total finance receivables more than 30 days delinquent or in repossession | $ | 1,583 |  |  | 5.1 | % |  | $ | 1,556 |  |  | 6.4 | %
Commercial Finance Receivables [Member] |
Finance Receivables [Line Items] |
Commercial Finance Receivables Credit Quality | The following table summarizes the credit risk profile by dealer risk rating of commercial finance receivables:
|  | June 30, 2017 |  | December 31, 2016
Group I | – Dealers with superior financial metrics | $ | 1,610 |  |  | $ | 1,372 |
Group II | – Dealers with strong financial metrics | 3,260 |  |  | 2,526 |
Group III | – Dealers with fair financial metrics | 3,180 |  |  | 2,598 |
Group IV | – Dealers with weak financial metrics | 855 |  |  | 613 |
Group V | – Dealers warranting special mention due to elevated risks | 328 |  |  | 334 |
Group VI | – Dealers with loans classified as substandard, doubtful or impaired | 110 |  |  | 90 |
|  | $ | 9,343 |  |  | $ | 7,533 |

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- Definition Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 55 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=82894031&loc=SL6953803-111525 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953659-111524 + Details
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