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GM Financial Receivables and Transactions - Commercial Finance Receivables Credit Quality Indicators (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
GM Financial
Financing Receivable, Credit Quality Indicator [Line Items]
GM Financial receivables, net of fees	$ 72,686	$ 64,702
Commercial Finance Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Finance receivables, nonaccrual status	0
Commercial Finance Receivables | GM Financial
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	7,922	5,498
2022	403	431
2021	370	427
2020	365	134
2019	105	50
2018	40	55
Prior	20	14
GM Financial receivables, net of fees	$ 9,225	$ 6,609
Percent	100.00%	100.00%
Commercial Finance Receivables | GM Financial | Group I - Performing accounts with strong to acceptable financial metrics
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 7,677	$ 5,210
2022	387	420
2021	368	396
2020	365	120
2019	93	50
2018	40	50
Prior	20	10
GM Financial receivables, net of fees	$ 8,950	$ 6,256
Percent	97.00%	94.70%
Commercial Finance Receivables | GM Financial | Group II - Performing accounts experiencing potential weakness in financial metrics
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 196	$ 207
2022	15	3
2021	2	16
2020	0	12
2019	7	0
2018	0	3
Prior	0	0
GM Financial receivables, net of fees	$ 221	$ 241
Percent	2.40%	3.60%
Commercial Finance Receivables | GM Financial | Group III - Non-Performing accounts with inadequate paying capacity for current obligations
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 50	$ 81
2022	0	8
2021	0	15
2020	0	2
2019	5	0
2018	0	2
Prior	0	4
GM Financial receivables, net of fees	$ 55	$ 112
Percent	0.60%	1.70%
Commercial Finance Receivables | GM Financial | 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
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
GM Financial receivables, net of fees	$ 0	$ 0
Percent	0.00%	0.00%
Floorplan Advances | Commercial Finance Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Percent of revolving balance	94.00%	94.00%

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