Condensed Consolidated Balance Sheet & Mini Balance Sheet - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Assets [Abstract]
Cash and cash equivalents, noninterest-bearing	$ 609	$ 619
Cash and cash equivalents, interest-bearing	18,522	2,936
Total cash and cash equivalents	19,131	3,555
Equity securities	613	616
Available-for-sale securities	29,225	30,284
Held-to-maturity securities	1,390	1,568
Loans held-for-sale, net	404	158
Finance receivables and loans, net [Abstract]
Finance receivables and loans, net	118,234	128,231
Allowance for loan losses	3,354	1,263
Total finance receivables and loans, net	114,880	126,968
Investment in operating leases, net	9,088	8,864
Premiums receivable and other insurance assets	2,609	2,558
Other assets	6,721	6,073
Total assets	184,061	180,644
Liabilities and Equity [Abstract]
Deposit liabilities, noninterest-bearing	134	119
Deposit liabilities, interest-bearing	130,902	120,633
Total deposit liabilities	131,036	120,752
Short-term borrowings	3,689	5,531
Long-term debt	29,176	34,027
Interest payable	697	641
Unearned insurance premiums and service revenue	3,338	3,305
Accrued expenses and other liabilities	2,299	1,972
Total liabilities	170,235	166,228
Equity [Abstract]
Common Stocks, Including Additional Paid in Capital	21,499	21,438
Accumulated deficit	(5,296)	(4,057)
Accumulated other comprehensive income (loss)	815	123
Treasury stock, at cost	(3,192)	(3,088)
Total equity	13,826	14,416
Total liabilities and equity	184,061	180,644
On-balance sheet variable interest entities
Finance receivables and loans, net [Abstract]
Finance receivables and loans, net	16,130	18,710
Allowance for loan losses	401	153
Total finance receivables and loans, net	15,729	18,557
Other assets	893	787
Total assets	16,622	19,344
Liabilities and Equity [Abstract]
Long-term debt	6,493	9,087
Accrued expenses and other liabilities	6	11
Total liabilities	$ 6,499	$ 9,098