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GM Financial Receivables and Transactions Commercial Finance Receivables Credit Quality Indicators (Details) - GM Financial [Member] - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | $ 52,844 | $ 42,671
Commercial Finance Receivables [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | 12,276 | 9,957
Commercial Finance Receivables [Member] | Group I Dealers [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | 2,192 | 1,915
Commercial Finance Receivables [Member] | Group II Dealers [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | 4,399 | 3,465
Commercial Finance Receivables [Member] | Group III Dealers [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | 4,064 | 3,239
Commercial Finance Receivables [Member] | Group IV Dealers [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | 1,116 | 997
Commercial Finance Receivables [Member] | Group V Dealers [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | 422 | 260
Commercial Finance Receivables [Member] | Group VI Dealers [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Finance Receivables | $ 83 | $ 81

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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://fasb.org/us-gaap/role/ref/legacyRef -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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