Finance Receivables - Credit Risk Profile by Dealer (Details) - Commercial Finance Receivables - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revolving	$ 9,878	$ 9,791
2023	222	581
2022	571	363
2021	329	372
2020	334	112
2019	105	45
Prior	44	25
Total	$ 11,485	$ 11,288
Percent	100.00%	100.00%
Floorplan Advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of revolving balance	95.00%	97.00%
Group I - Performing accounts with strong to acceptable financial metrics
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revolving	$ 9,636	$ 9,624
2023	222	566
2022	553	361
2021	328	372
2020	334	102
2019	97	45
Prior	44	24
Total	$ 11,214	$ 11,094
Percent	97.60%	98.30%
Group II - Performing accounts experiencing potential weakness in financial metrics
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revolving	$ 136	$ 89
2023	0	0
2022	0	1
2021	1	0
2020	0	0
2019	0	0
Prior	0	0
Total	$ 137	$ 91
Percent	1.20%	0.80%
Group III - Non-Performing accounts with inadequate paying capacity for current obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revolving	$ 106	$ 78
2023	0	15
2022	18	0
2021	0	0
2020	0	10
2019	9	0
Prior	0	0
Total	$ 133	$ 104
Percent	1.20%	0.90%
Group IV - Non-Performing accounts with inadequate paying capacity for current obligations and inherent weaknesses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revolving	$ 0	$ 0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior	0	0
Total	$ 0	$ 0
Percent	0.00%	0.00%