Other Assets and Other Liabilities and Deferred Income (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Other Assets [Abstract]
Accrued interest and other non-finance receivables	$ 677	$ 576
Collateral held for resale, at net realizable value, and other inventory	426	233
Prepaid reinsurance premiums and other reinsurance recoverables	818	779
Deferred charges - income taxes	190	158
Property and equipment, net of accumulated depreciation	270	233
Restricted cash	137	127
Investment in non-consolidated affiliates	167	177
Operating Lease, Right-of-Use Asset	53	64
Other	202	229
Total other assets	2,940	2,576
Accumulated depreciation	453	415
Other Liabilities and Deferred Income [Abstract]
Unearned insurance premiums and fees	930	891
Interest payable	963	683
Taxes Payable	186	115
Operating Lease, Liability	55	66
Other	325	280
Other liabilities and deferred income	2,459	2,035
Related Party Transactions Income Taxes and Related Interest Payable	$ 62	$ 36
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Total other assets	Total other assets
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other liabilities and deferred income	Other liabilities and deferred income