Finance Receivables - Credit Risk Profile by FICO Score (Details) - Retail Finance Receivables [Member] - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 29,090	$ 27,638
2021	18,745	17,324
2020	11,081	7,084
2019	3,992	3,918
2018	1,824	1,607
Prior	589	522
Total	$ 65,322	$ 58,093
Percent of portfolio	100.00%	100.00%
Prime - FICO Score 680 and greater
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 22,677	$ 19,729
2021	13,399	12,408
2020	7,991	4,078
2019	2,254	2,298
2018	1,019	763
Prior	205	143
Total	$ 47,543	$ 39,419
Percent of portfolio	72.80%	67.90%
Near-prime - FICO Score 620 to 679
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 3,202	$ 3,856
2021	2,601	2,388
2020	1,487	1,229
2019	688	648
2018	310	274
Prior	104	84
Total	$ 8,392	$ 8,479
Percent of portfolio	12.80%	14.60%
Sub-prime - FICO Score less than 620
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 3,211	$ 4,053
2021	2,746	2,528
2020	1,604	1,777
2019	1,051	972
2018	496	570
Prior	280	295
Total	$ 9,388	$ 10,195
Percent of portfolio	14.40%	17.50%