GM Financial Receivables and Transactions - Commercial Finance Receivables Credit Quality Indicators (Details) - USD ($) $ in Millions	Jun. 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	$ 94,236	$ 95,294
GM Financial \| Commercial Finance Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Total	16,399	19,228
GM Financial \| Commercial Finance Receivables \| Dealer Financing
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	14,333	17,117
2025	160	331
2024	298	223
2023	182	385
2022	359	263
2021	243	269
Prior	253	35
Total	$ 15,828	$ 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	$ 12,840	$ 16,190
2025	152	321
2024	221	209
2023	149	360
2022	331	237
2021	184	267
Prior	233	22
Total	$ 14,109	$ 17,606
Percent	89.10%	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	$ 905	$ 621
2025	3	0
2024	27	10
2023	29	26
2022	14	3
2021	36	2
Prior	5	0
Total	$ 1,020	$ 663
Percent	6.40%	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	$ 587	$ 305
2025	4	10
2024	50	4
2023	5	0
2022	14	22
2021	23	0
Prior	15	12
Total	$ 699	$ 354
Percent	4.40%	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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