GM Financial Receivables and Transactions - Commercial Finance Receivables Credit Quality Indicators (Details) - USD ($) $ in Millions	Sep. 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	99.20%	99.10%
GM Financial
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 94,326	$ 92,374
GM Financial \| Commercial Finance Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Total	17,675	16,970
GM Financial \| Commercial Finance Receivables \| Dealer Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	15,739	14,913
2026	383	352
2025	271	271
2024	218	149
2023	109	319
2022	267	209
Prior	239	161
Total	$ 17,225	$ 16,374
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	$ 14,057	$ 13,421
2026	349	337
2025	261	191
2024	116	121
2023	85	298
2022	248	160
Prior	209	147
Total	$ 15,325	$ 14,674
Percent	89.00%	89.60%
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	$ 1,194	$ 985
2026	21	10
2025	7	33
2024	64	25
2023	22	7
2022	5	35
Prior	24	2
Total	$ 1,338	$ 1,096
Percent	7.80%	6.70%
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	$ 488	$ 507
2026	13	5
2025	3	48
2024	38	3
2023	1	14
2022	14	14
Prior	6	12
Total	$ 562	$ 603
Percent	3.30%	3.70%
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
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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