GM Financial Receivables and Transactions - Commercial Finance Receivables Credit Quality Indicators (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Commercial Finance Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Finance receivables, nonaccrual status		$ 0
Commercial Finance Receivables \| Floorplan Advances
Financing Receivable, Credit Quality Indicator [Line Items]
Percent of revolving balance	98.90%	99.10%
GM Financial
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 92,189	$ 92,374
GM Financial \| Commercial Finance Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Total	16,126	16,970
GM Financial \| Commercial Finance Receivables \| Dealer Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	14,151	14,913
2026	318	352
2025	289	271
2024	236	149
2023	116	319
2022	277	209
Prior	268	161
Total	$ 15,654	$ 16,374
Percent	100.00%	100.00%
GM Financial \| Commercial Finance Receivables \| Dealer Financing \| I
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 12,671	$ 13,421
2026	299	337
2025	277	191
2024	154	121
2023	88	298
2022	257	160
Prior	219	147
Total	$ 13,966	$ 14,674
Percent	89.20%	89.60%
GM Financial \| Commercial Finance Receivables \| Dealer Financing \| II
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 1,026	$ 985
2026	17	10
2025	9	33
2024	42	25
2023	23	7
2022	5	35
Prior	31	2
Total	$ 1,154	$ 1,096
Percent	7.40%	6.70%
GM Financial \| Commercial Finance Receivables \| Dealer Financing \| III
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 454	$ 507
2026	1	5
2025	3	48
2024	40	3
2023	5	14
2022	14	14
Prior	18	12
Total	$ 534	$ 603
Percent	3.40%	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%

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