Finance Receivables - Credit Risk Profile by FICO Score (Details) - Retail Finance Receivables - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
2023	$ 8,663	$ 29,090
2022	26,699	18,745
2021	17,138	11,081
2020	9,936	3,992
2019	3,429	1,824
Prior	1,839	589
Total	$ 67,704	$ 65,322	$ 59,503
Percent	100.00%	100.00%
Prime - FICO Score 680 and greater
Financing Receivable, Credit Quality Indicator [Line Items]
2023	$ 6,996	$ 22,677
2022	20,633	13,399
2021	12,223	7,991
2020	7,149	2,254
2019	1,915	1,019
Prior	914	205
Total	$ 49,829	$ 47,543
Percent	73.60%	72.80%
Near-prime - FICO Score 620 to 679
Financing Receivable, Credit Quality Indicator [Line Items]
2023	$ 832	$ 3,202
2022	3,012	2,601
2021	2,389	1,487
2020	1,345	688
2019	599	310
Prior	322	104
Total	$ 8,498	$ 8,392
Percent	12.60%	12.80%
Sub-prime - FICO Score less than 620
Financing Receivable, Credit Quality Indicator [Line Items]
2023	$ 835	$ 3,211
2022	3,054	2,746
2021	2,525	1,604
2020	1,443	1,051
2019	916	496
Prior	603	280
Total	$ 9,377	$ 9,388
Percent	13.80%	14.40%