Consolidated Balance Sheet - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Assets [Abstract]
Noninterest-bearing cash and cash equivalents	$ 1,790	$ 2,148
Interest-bearing cash and cash equivalents	3,941	4,232
Total cash and cash equivalents	5,731	6,380
Available-for-sale securities	18,197	17,157
Held-to-maturity securities	571	0
Loans held-for-sale, net	15	105
Finance receivables and loans, net [Abstract]
Finance receivables and loans, net	112,653	111,600
Allowance for loan losses	(1,089)	(1,054)
Total finance receivables and loans, net	111,564	110,546
Investment in operating leases, net	13,755	16,271
Premiums receivable and other insurance assets	1,844	1,801
Other assets	6,254	6,321
Total assets	157,931	158,581
Liabilities and Equity [Abstract]
Noninterest-bearing deposit liabilities	94	89
Interest-bearing deposit liabilities	72,708	66,389
Total deposit liabilities	72,802	66,478
Short-term borrowings	5,994	8,101
Long-term debt	61,040	66,234
Interest payable	427	350
Unearned insurance premiums and service revenue	2,465	2,434
Accrued expenses and other liabilities	1,592	1,545
Total liabilities	144,320	145,142
Equity [Abstract]
Common stock and paid-in-capital	21,136	21,100
Preferred stock	0	696
Accumulated deficit	(7,530)	(8,110)
Accumulated other comprehensive loss	35	(231)
Treasury stock, at cost	(30)	(16)
Total equity	13,611	13,439
Total liabilities and equity	157,931	158,581
Variable Interest Entity, Primary Beneficiary [Member]
Finance receivables and loans, net [Abstract]
Finance receivables and loans, net	26,104	27,929
Allowance for loan losses	(190)	(196)
Total finance receivables and loans, net	25,914	27,733
Investment in operating leases, net	3,257	4,791
Other assets	1,203	1,624
Total assets	30,374	34,148
Liabilities and Equity [Abstract]
Long-term debt	16,783	20,267
Accrued expenses and other liabilities	18	22
Total liabilities	$ 16,801	$ 20,289