GM Financial Receivables and Transactions - Commercial Finance Receivables Credit Quality Indicators (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
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	99.00%	99.10%
GM Financial
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 90,198	$ 92,374
GM Financial \| Commercial Finance Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Total	15,305	16,970
GM Financial \| Commercial Finance Receivables \| Dealer Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	13,329	14,913
2026	198	352
2025	306	271
2024	263	149
2023	125	319
2022	307	209
Prior	314	161
Total	$ 14,843	$ 16,374
Percent	100.00%	100.00%
GM Financial \| Commercial Finance Receivables \| Dealer Financing \| I
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 11,884	$ 13,421
2026	191	337
2025	285	191
2024	177	121
2023	98	298
2022	287	160
Prior	254	147
Total	$ 13,176	$ 14,674
Percent	88.80%	89.60%
GM Financial \| Commercial Finance Receivables \| Dealer Financing \| II
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 992	$ 985
2026	7	10
2025	16	33
2024	39	25
2023	27	7
2022	7	35
Prior	34	2
Total	$ 1,121	$ 1,096
Percent	7.60%	6.70%
GM Financial \| Commercial Finance Receivables \| Dealer Financing \| III
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 453	$ 507
2026	1	5
2025	5	48
2024	47	3
2023	1	14
2022	14	14
Prior	25	12
Total	$ 546	$ 603
Percent	3.70%	3.70%
GM Financial \| Commercial Finance Receivables \| Dealer Financing \| IV
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 0	$ 0
2026	0	0
2025	0	0
2024	0	0
2023	0	0
2022	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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