Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Assets [Abstract]
Cash and Due from Banks	$ 1,043	$ 1,073
Interest-bearing Deposits in Banks and Other Financial Institutions	6,394	6,440
Total cash and cash equivalents	7,437	7,513
Investment securities	15,752	14,178
Loans held-for-sale, net	718	2,576
Finance receivables and loans, net [Abstract]
Finance receivables and loans, net	99,123	99,055
Allowance for loan losses	(1,197)	(1,170)
Total finance receivables and loans, net	97,926	97,885
Investment in operating leases, net	14,828	13,550
Mortgage servicing rights	917	952
Premiums receivable and other insurance assets	1,608	1,609
Other Assets	7,950	11,908
Assets of operations held-for-sale	19,063	32,176
Total assets	166,199	182,347
Liabilities and Equity [Abstract]
Noninterest-bearing deposit liabilities	844	1,977
Interest-bearing deposit liabilities	49,482	45,938
Total deposit liabilities	50,326	47,915
Short-term borrowings	7,618	7,461
Long-term debt	67,621	74,561
Interest payable	972	932
Unearned insurance premiums and service revenue	2,286	2,296
Accrued expenses and other liabilities	3,669	6,585
Liabilities of operations held-for-sale	13,233	22,699
Total liabilities	145,725	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)	(6,128)	(7,021)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(6)	311
Stockholders' Equity Attributable to Parent	20,474	19,898
Total liabilities and equity	166,199	182,347
Variable Interest Entity, Primary Beneficiary [Member]
Finance receivables and loans, net [Abstract]
Finance receivables and loans, net	30,181	31,510
Allowance for loan losses	(152)	(144)
Total finance receivables and loans, net	30,029	31,366
Investment in operating leases, net	5,276	6,060
Other Assets	2,211	2,868
Assets of operations held-for-sale	7,835	12,139
Total assets	45,351	52,433
Liabilities and Equity [Abstract]
Short-term borrowings	400	400
Long-term debt	25,757	26,461
Interest payable	0	1
Accrued expenses and other liabilities	21	16
Liabilities of operations held-for-sale	5,762	9,686
Total liabilities	$ 31,940	$ 36,564