Other Assets and Other Liabilities and Deferred Income (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Other Assets and Other Liabilities [Abstract]
Accrued interest and other non-finance receivables	$ 588	$ 576
Property, Plant and Equipment, Net	241	233
Collateral held for resale, at net realizable value, and other inventory	213	233
Deferred charges - income taxes	151	158
Prepaid Reinsurance Premiums and Other Reinsurance Recoverables	788	779
Operating lease assets	64	64
Investment in non-consolidated affiliates	179	177
Other	232	229
Other assets	2,589	2,576
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	426	415
Unearned Premiums and Fees	899	891
Interest Payable	701	683
Taxes Payable	149	115
Operating Lease, Liability	66	66
Other Liabilities	2,079	2,035
Related Party Transactions Income Taxes and Related Interest Payable	60	36
Other Liabilities, Miscellaneous	264	280
Restricted Cash	133	127
Property Subject to Operating Lease [Member]
Other Assets and Other Liabilities [Abstract]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 4,136	$ 4,234