GM Financial Receivables and Transactions - Commercial Finance Receivables Credit Quality Indicators (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
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	99.10%	99.50%
GM Financial
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 92,558	$ 95,294
GM Financial \| Commercial Finance Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Total	16,700	19,228
GM Financial \| Commercial Finance Receivables \| Dealer Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	14,748	17,117
2025	240	331
2024	282	223
2023	170	385
2022	339	263
2021	228	269
Prior	222	35
Total	$ 16,230	$ 18,623
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	$ 13,245	$ 16,190
2025	228	321
2024	214	209
2023	135	360
2022	315	237
2021	176	267
Prior	205	22
Total	$ 14,519	$ 17,606
Percent	89.50%	94.50%
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	$ 967	$ 621
2025	6	0
2024	27	10
2023	28	26
2022	9	3
2021	35	2
Prior	2	0
Total	$ 1,075	$ 663
Percent	6.60%	3.60%
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	$ 536	$ 305
2025	6	10
2024	41	4
2023	7	0
2022	14	22
2021	17	0
Prior	15	12
Total	$ 635	$ 354
Percent	3.90%	1.90%
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	$ 1
2025	0	0
2024	0	0
2023	0	0
2022	0	0
2021	0	0
Prior	0	0
Total	$ 0	$ 1
Percent	0.00%	0.00%

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