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GM Financial Receivables and Transactions - Commercial Finance Receivables Credit Quality Indicators (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
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GM Financial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
GM Financial receivables, net of fees | $ 56,756 | $ 53,900
Commercial Finance Receivables [Member] | GM Financial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Revolving | 7,110 |
2020 | 356 |
2019 | 193 |
2018 | 105 |
2017 | 103 |
2016 | 117 |
2015 | 56 |
Prior | 22 |
GM Financial receivables, net of fees | $ 8,062 | $ 11,671
Percent | 100.00% |
Commercial Finance Receivables [Member] | GM Financial [Member] | Group I - Performing accounts with strong to acceptable financial metrics [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Revolving | $ 6,468 |
2020 | 355 |
2019 | 177 |
2018 | 73 |
2017 | 98 |
2016 | 93 |
2015 | 38 |
Prior | 0 |
GM Financial receivables, net of fees | $ 7,302 |
Percent | 90.60% |
Commercial Finance Receivables [Member] | GM Financial [Member] | Group II - Performing accounts experiencing potential weakness in financial metrics [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Revolving | $ 411 |
2020 | 1 |
2019 | 7 |
2018 | 3 |
2017 | 3 |
2016 | 13 |
2015 | 13 |
Prior | 22 |
GM Financial receivables, net of fees | $ 473 |
Percent | 5.90% |
Commercial Finance Receivables [Member] | GM Financial [Member] | Group III - Non-Performing accounts with inadequate paying capacity for current obligations [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Revolving | $ 227 |
2020 | 0 |
2019 | 9 |
2018 | 29 |
2017 | 2 |
2016 | 11 |
2015 | 1 |
Prior | 0 |
GM Financial receivables, net of fees | $ 279 |
Percent | 3.40% |
Commercial Finance Receivables [Member] | GM Financial [Member] | Group IV - Non-Performing accounts with inadequate paying capacity for current obligations and inherent weaknesses [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Revolving | $ 4 |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
2016 | 0 |
2015 | 4 |
Prior | 0 |
GM Financial receivables, net of fees | $ 8 |
Percent | 0.10% |
Floorplan Advances [Member] | Commercial Finance Receivables [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Percent of revolving balance | 98.00% |

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- Definition Amount of financing receivable originated four years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
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