Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets [Abstract]
Cash and Due from Banks	$ 1,292	$ 1,073
Interest-bearing Deposits in Banks and Other Financial Institutions	6,482	6,440
Total cash and cash equivalents	7,774	7,513
Investment securities	17,015	14,178
Loans held-for-sale, net	102	2,576
Finance receivables and loans, net [Abstract]
Finance receivables and loans, net	96,993	99,055
Allowance for loan losses	(1,183)	(1,170)
Total finance receivables and loans, net	95,810	97,885
Investment in operating leases, net	16,085	13,550
Mortgage servicing rights	0	952
Premiums receivable and other insurance assets	1,611	1,609
Other Assets	6,701	11,908
Assets of operations held-for-sale	5,529	32,176
Total assets	150,627	182,347
Liabilities and Equity [Abstract]
Noninterest-bearing deposit liabilities	72	1,977
Interest-bearing deposit liabilities	50,053	45,938
Total deposit liabilities	50,125	47,915
Short-term borrowings	4,197	7,461
Long-term debt	64,534	74,561
Interest payable	999	932
Unearned insurance premiums and service revenue	2,301	2,296
Accrued expenses and other liabilities	5,043	6,585
Liabilities of operations held-for-sale	4,263	22,699
Total liabilities	131,462	162,449
Equity [Abstract]
Common stock and paid-in-capital	19,668	19,668
Mandatorily convertible preferred stock held by U.S. Department of Treasury	5,685	5,685
Preferred stock	1,255	1,255
Retained Earnings (Accumulated Deficit)	(7,256)	(7,021)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(187)	311
Stockholders' Equity Attributable to Parent	19,165	19,898
Total liabilities and equity	150,627	182,347
Variable Interest Entity, Primary Beneficiary [Member]
Finance receivables and loans, net [Abstract]
Finance receivables and loans, net	29,001	31,510
Allowance for loan losses	(144)	(144)
Total finance receivables and loans, net	28,857	31,366
Investment in operating leases, net	5,956	6,060
Other Assets	1,479	2,868
Assets of operations held-for-sale	155	12,139
Total assets	36,447	52,433
Liabilities and Equity [Abstract]
Short-term borrowings	500	400
Long-term debt	25,398	26,461
Interest payable	1	1
Accrued expenses and other liabilities	24	16
Liabilities of operations held-for-sale	155	9,686
Total liabilities	$ 26,078	$ 36,564