Parent Company Condensed Financial Information (Condensed Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash and cash equivalents	$ 15,621	$ 3,555
Finance receivables and loans, net	118,534	128,231
Allowance for loan losses	(3,283)	(1,263)	$ (1,242)
Total finance receivables and loans, net	115,251	126,968
Investment in operating leases, net	9,639	8,864
Other assets	6,415	6,073
Total assets	182,165	180,644	178,869
Short-term borrowings	2,136	5,531
Long-term debt	22,006	34,027
Interest payable	412	641
Accrued expenses and other liabilities	2,434	1,972
Total liabilities	167,462	166,228
Equity	14,703	14,416	$ 13,268	$ 13,494
Total liabilities and equity	182,165	180,644
Parent company
Cash and cash equivalents	4,482	2,105
Finance receivables and loans, net	913	2,328
Allowance for loan losses	(10)	(22)
Total finance receivables and loans, net	903	2,306
Investments in bank subsidiaries	17,146	16,954
Investments in nonbank subsidiaries	6,090	6,535
Intercompany receivables from subsidiaries	176	144
Investment in operating leases, net	5	1
Other assets	2,034	2,193
Total assets	30,836	30,238
Short-term borrowings	2,136	2,581
Long-term debt	12,014	11,389
Interest payable	111	145
Intercompany debt to subsidiaries	1,375	1,207
Intercompany payables to subsidiaries	91	116
Accrued expenses and other liabilities	406	384
Total liabilities	16,133	15,822
Equity	14,703	14,416
Total liabilities and equity	30,836	30,238
Deposits by parent at subsidiaries	4,400	2,100
Liquidity available to parent from funds advanced to subsidiary	197	161
Guarantor subsidiaries
Long-term debt	$ 2,000	$ 2,900