Other Assets and Other Liabilities and Deferred Income (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Other Assets [Abstract]
Accrued interest and other non-finance receivables	$ 666	$ 677
Collateral held for resale, at net realizable value, and other inventory	392	426
Prepaid reinsurance premiums and other reinsurance recoverables	876	818
Deferred charges - income taxes	178	190
Property and equipment, net of accumulated depreciation	283	270
Restricted cash	88	137
Investment in non-consolidated affiliates	182	167
Operating Lease, Right-of-Use Asset	40	53
Other	350	202
Total other assets	3,055	2,940
Accumulated depreciation	448	453
Other Liabilities and Deferred Income [Abstract]
Unearned insurance premiums and fees	995	930
Interest payable	1,098	963
Taxes Payable	131	186
Employee-related Liabilities	86	96
Operating Lease, Liability	42	55
Other	275	229
Other liabilities and deferred income	2,627	2,459
Related Party Transactions Income Taxes and Related Interest Payable	$ 9	$ 62
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