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GM Financial Receivables Commercial Finance Receivables Credit Quality Indicators (Details) - GM Financial [Member] - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | $ 42,671 | $ 33,933
Commercial Finance Receivables [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | 9,957 | 7,533
Commercial Finance Receivables [Member] | Group I Dealers [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | 1,915 | 1,372
Commercial Finance Receivables [Member] | Group II Dealers [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | 3,465 | 2,526
Commercial Finance Receivables [Member] | Group III Dealers [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | 3,239 | 2,598
Commercial Finance Receivables [Member] | Group IV Dealers [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | 997 | 613
Commercial Finance Receivables [Member] | Group V Dealers [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | 260 | 334
Commercial Finance Receivables [Member] | Group VI Dealers [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | $ 81 | $ 90

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- Definition 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. + Details
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- Definition Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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