Segment Reporting and Geographic Information - Operations Reporting by Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total revenue	$ 12,766	$ 13,419	$ 13,831
Operating expenses	1,662	1,648	1,490
Leased vehicle expenses	3,668	4,142	5,882
Provision for loan losses	654	248	881
Interest expense	2,881	2,546	3,023
Equity income	173	201	147
Income before income taxes	4,076	5,036	2,702
North America
Segment Reporting Information [Line Items]
Total revenue	11,777	12,503	12,851
Operating expenses	1,330	1,328	1,184
Leased vehicle expenses	3,613	4,093	5,834
Provision for loan losses	537	164	653
Interest expense	2,526	2,309	2,717
Equity income	0	0	0
Income before income taxes	3,771	4,609	2,463
International
Segment Reporting Information [Line Items]
Total revenue	989	916	980
Operating expenses	332	320	306
Leased vehicle expenses	54	49	48
Provision for loan losses	116	84	228
Interest expense	355	237	306
Equity income	173	201	147
Income before income taxes	$ 305	$ 427	$ 239