Equity in Net Assets of Non-consolidated Affiliates (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Noncontrolling Interest [Line Items]
Finance charge income	$ 1,490	$ 1,062	$ 2,859	$ 2,072
Income before income taxes	766	1,106	1,537	2,390
Net income	37	50	78	104
Joint Ventures
Noncontrolling Interest [Line Items]
Finance charge income	352	424	744	875
Income before income taxes	141	190	296	396
Net income	106	$ 143	222	$ 297
Undistributed earnings	$ 873		$ 873		$ 795