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GM Financial Receivables and Transactions - Commercial Finance Receivables Credit Quality Indicators (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
GM Financial
Financing Receivable, Credit Quality Indicator [Line Items]
GM Financial receivables, net of fees	$ 68,733	$ 64,702
Commercial Finance Receivables | GM Financial
Financing Receivable, Credit Quality Indicator [Line Items]
Finance receivables, nonaccrual status	0
Revolving	6,197	5,498
2022	355	431
2021	392	427
2020	387	134
2019	112	50
2018	42	55
Prior	40	14
GM Financial receivables, net of fees	$ 7,526	$ 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	$ 5,954	$ 5,210
2022	339	420
2021	390	396
2020	387	120
2019	99	50
2018	42	50
Prior	38	10
GM Financial receivables, net of fees	$ 7,249	$ 6,256
Percent	96.30%	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	$ 184	$ 207
2022	15	3
2021	1	16
2020	0	12
2019	12	0
2018	0	3
Prior	2	0
GM Financial receivables, net of fees	$ 214	$ 241
Percent	2.80%	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	$ 59	$ 81
2022	1	8
2021	2	15
2020	0	2
2019	1	0
2018	0	2
Prior	0	4
GM Financial receivables, net of fees	$ 63	$ 112
Percent	0.80%	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	93.00%	94.00%

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