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GM Financial Receivables and Transactions - Commercial Finance Receivables Credit Quality Indicators (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
GM Financial
Financing Receivable, Credit Quality Indicator [Line Items]
GM Financial receivables, net of fees	$ 64,702	$ 59,970
Commercial Finance Receivables | Floorplan advances
Financing Receivable, Credit Quality Indicator [Line Items]
Percent of Contractual Amount Due	94.00%	97.00%
Commercial Finance Receivables | GM Financial
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 5,498	$ 7,662
2021	431	512
2020	427	185
2019	134	94
2018	50	100
2017	55	72
Prior	14	57
GM Financial receivables, net of fees	$ 6,609	$ 8,682
Percent	100.00%	100.00%
Commercial Finance Receivables | GM Financial | I
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 5,210	$ 6,968
2021	420	510
2020	396	159
2019	120	63
2018	50	95
2017	50	43
Prior	10	19
GM Financial receivables, net of fees	$ 6,256	$ 7,857
Percent	94.70%	90.50%
Commercial Finance Receivables | GM Financial | II
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 207	$ 491
2021	3	2
2020	16	18
2019	12	2
2018	0	3
2017	3	18
Prior	0	34
GM Financial receivables, net of fees	$ 241	$ 568
Percent	3.60%	6.50%
Commercial Finance Receivables | GM Financial | III
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 81	$ 203
2021	8	0
2020	15	8
2019	2	29
2018	0	2
2017	2	11
Prior	4	0
GM Financial receivables, net of fees	$ 112	$ 253
Percent	1.70%	2.90%
Commercial Finance Receivables | GM Financial | IV
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving	$ 0	$ 0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	4
GM Financial receivables, net of fees	$ 0	$ 4
Percent	0.00%	0.10%

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