GM Financial Receivables and Transactions - Commercial Finance Receivables Credit Quality Indicators (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
GM Financial
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 95,294	$ 86,463
Commercial Finance Receivables \| Floorplan advances
Financing Receivable, Credit Quality Indicator [Line Items]
Percent of revolving balance	99.50%	99.70%
Commercial Finance Receivables \| GM Financial
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 19,228	$ 13,734
Finance receivables, nonaccrual status	0	0
Commercial Finance Receivables \| GM Financial \| Dealer Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	17,117	11,846
2024	331	281
2023	223	421
2022	385	311
2021	263	301
2020	269	86
Prior	35	11
Total	$ 18,623	$ 13,257
Percent	100.00%	100.00%
Commercial Finance Receivables \| GM Financial \| I \| Dealer Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 16,190	$ 11,513
2024	321	279
2023	209	403
2022	360	297
2021	237	301
2020	267	75
Prior	22	11
Total	$ 17,606	$ 12,879
Percent	94.50%	97.10%
Commercial Finance Receivables \| GM Financial \| II \| Dealer Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 621	$ 182
2024	0	0
2023	10	2
2022	26	2
2021	3	0
2020	2	0
Prior	0	0
Total	$ 663	$ 187
Percent	3.60%	1.40%
Commercial Finance Receivables \| GM Financial \| III \| Dealer Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 305	$ 152
2024	10	1
2023	4	15
2022	0	12
2021	22	0
2020	0	11
Prior	12	0
Total	$ 354	$ 192
Percent	1.90%	1.40%
Commercial Finance Receivables \| GM Financial \| IV \| Dealer Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 1	$ 0
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Total	$ 1	$ 0
Percent	0.00%	0.00%

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Financing Receivable, before Allowance for Credit Loss, Percent

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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 in current fiscal year. Excludes net investment in lease.

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Amortized cost of financing receivable originated in fiscal year 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 of financing receivable that can be withdrawn, repaid, and redrawn.

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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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