GM Financial Receivables and Transactions - Commercial Finance Receivables Credit Quality Indicators (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Commercial Finance Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Finance receivables, nonaccrual status	$ 0	$ 0
Commercial Finance Receivables \| Floorplan Advances
Financing Receivable, Credit Quality Indicator [Line Items]
Percent of revolving balance	99.40%	99.70%
GM Financial
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 92,759	$ 86,463
GM Financial \| Commercial Finance Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Total	18,375	13,734
GM Financial \| Commercial Finance Receivables \| Dealer Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	16,337	11,846
2024	261	281
2023	237	421
2022	406	311
2021	283	301
2020	281	86
Prior	39	11
Total	$ 17,844	$ 13,257
Percent	100.00%	100.00%
GM Financial \| Commercial Finance Receivables \| Dealer Financing \| Group I - Performing accounts with strong to acceptable financial metrics
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 15,542	$ 11,513
2024	251	279
2023	228	403
2022	380	297
2021	256	301
2020	280	75
Prior	27	11
Total	$ 16,965	$ 12,879
Percent	95.10%	97.10%
GM Financial \| Commercial Finance Receivables \| Dealer Financing \| Group II - Performing accounts experiencing potential weakness in financial metrics
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 453	$ 182
2024	0	0
2023	4	2
2022	26	2
2021	3	0
2020	1	0
Prior	0	0
Total	$ 487	$ 187
Percent	2.70%	1.40%
GM Financial \| Commercial Finance Receivables \| Dealer Financing \| Group III - Non-Performing accounts with inadequate paying capacity for current obligations
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 341	$ 152
2024	10	1
2023	4	15
2022	0	12
2021	24	0
2020	0	11
Prior	12	0
Total	$ 393	$ 192
Percent	2.20%	1.40%
GM Financial \| Commercial Finance Receivables \| Dealer Financing \| Group IV - Non-Performing accounts with inadequate paying capacity for current obligations and inherent weaknesses
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 0	$ 0
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Total	$ 0	$ 0
Percent	0.00%	0.00%

Financing Receivable, Before Allowance For Credit Loss, Percent

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Financing Receivable, Revolving, Percent Of Total

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Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

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Amortized cost of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease.

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Amortized cost of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

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Amortized cost of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease.

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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.

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Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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