Finance Receivables - Credit Risk Profile by Dealer grouping of Commercial Finance Receivables (Details) - Commercial Finance Receivables - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revolving	$ 9,791	$ 5,590
2022	581	446
2021	363	457
2020	372	145
2019	112	58
2018	45	62
Prior	25	14
Total	$ 11,288	$ 6,772
Percent of portfolio	100.00%	100.00%
I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revolving	$ 9,624	$ 5,296
2022	566	433
2021	361	426
2020	372	131
2019	102	57
2018	45	50
Prior	24	10
Total	$ 11,094	$ 6,403
Percent of portfolio	98.30%	94.60%
II
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revolving	$ 89	$ 213
2022	0	5
2021	1	16
2020	0	12
2019	0	1
2018	0	10
Prior	0	0
Total	$ 91	$ 257
Percent of portfolio	0.80%	3.80%
III
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revolving	$ 78	$ 81
2022	15	8
2021	0	15
2020	0	2
2019	10	0
2018	0	2
Prior	0	4
Total	$ 104	$ 112
Percent of portfolio	0.90%	1.60%
IV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revolving	$ 0	$ 0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
Total	$ 0	$ 0
Percent of portfolio	0.00%	0.00%