Other Assets and Other Liabilities and Deferred Income (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Schedule of Other Assets and Liabilities [Line Items]
Related Party Transactions Income Taxes and Related Interest Payable	$ 193	$ 99
Cost Method Investments	9	7
Other Assets [Abstract]
Accrued interest and other non-finance receivables	1,080	1,117
Collateral held for resale, at net realizable value, and other inventory	877	780
Prepaid reinsurance premiums and other reinsurance recoverables	658	611
Deferred charges - income taxes	216	247
Property and equipment, net of accumulated depreciation	192	177
Deferred charges	96	127
Restricted cash	140	124
Investment in non-consolidated affiliates	123	107
Other	74	39
Total other assets	3,456	3,329
Accumulated depreciation	367	354
Other Liabilities and Deferred Income [Abstract]
Unearned insurance premiums and fees	775	723
Interest payable	752	722
Taxes Payable	369	301
Deferred revenue	113	148
Payroll and employee benefits	70	68
Other	228	310
Total other liabilities and deferred income	2,307	2,272
Deferred Revenue, Admission Fees	$ 87	$ 124