Discontinued and Held-for-sale Operations Discontinued and Held-for-sale Operations (Select Balance Sheet Information for Held-for-sale Operations) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Due from Banks	$ 1,305	$ 2,475
Interest-bearing Deposits in Banks and Other Financial Institutions	15,852	10,560
Total cash and cash equivalents	17,157	13,035	16,402	11,670
Available-for-sale Securities	13,770	15,135
Loans held-for-sale, net	1,937	8,557
Finance receivables and loans, net	121,259	114,755
Loans and Leases Receivable, Allowance	(1,423)	(1,503)
Total finance receivables and loans, net	119,836	113,252
Investment in operating leases, net	12,708	9,275
Premiums receivable and other insurance assets	1,861	1,853
Other assets	13,936	18,741
Total assets	182,482	184,059	181,956
Unearned insurance premiums and service revenue	2,693	2,576
Reserves for insurance losses and loss adjustment expenses	441	580
Accrued expenses and other liabilities	9,962	14,084
Total liabilities	163,717	164,688
Mortgage Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Due from Banks		0
Interest-bearing Deposits in Banks and Other Financial Institutions		0
Total cash and cash equivalents		0
Available-for-sale Securities		0
Loans held-for-sale, net		260
Finance receivables and loans, net		285
Loans and Leases Receivable, Allowance		0
Total finance receivables and loans, net		285
Investment in operating leases, net		0
Premiums receivable and other insurance assets		0
Other assets		140
Impairment on assets of held-for-sale operations		0
Total assets		685
Unearned insurance premiums and service revenue		0
Reserves for insurance losses and loss adjustment expenses		0
Accrued expenses and other liabilities		80
Total liabilities		80
Insurance Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Due from Banks	4	4
Interest-bearing Deposits in Banks and Other Financial Institutions	87	54
Total cash and cash equivalents	91	58
Available-for-sale Securities	182	186
Loans held-for-sale, net		0
Finance receivables and loans, net		0
Loans and Leases Receivable, Allowance		0
Total finance receivables and loans, net	0	0
Investment in operating leases, net	0	0
Premiums receivable and other insurance assets	79	77
Other assets	20	14
Impairment on assets of held-for-sale operations	(51)	0
Total assets	321	335
Unearned insurance premiums and service revenue	137	130
Reserves for insurance losses and loss adjustment expenses	14	17
Accrued expenses and other liabilities	97	82
Total liabilities	248	229
International Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Due from Banks	28	55
Interest-bearing Deposits in Banks and Other Financial Institutions	8	38
Total cash and cash equivalents	36	93
Available-for-sale Securities	0	0
Loans held-for-sale, net		0
Finance receivables and loans, net		11
Loans and Leases Receivable, Allowance		(1)
Total finance receivables and loans, net	2	10
Investment in operating leases, net	25	91
Premiums receivable and other insurance assets	0	0
Other assets	11	30
Impairment on assets of held-for-sale operations	(20)	(174)
Total assets	54	50
Unearned insurance premiums and service revenue	0	0
Reserves for insurance losses and loss adjustment expenses	0	0
Accrued expenses and other liabilities	6	28
Total liabilities	6	28
Discontinued Operation or Asset Disposal [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Due from Banks	32	59
Interest-bearing Deposits in Banks and Other Financial Institutions	95	92
Total cash and cash equivalents	127	151
Available-for-sale Securities	182	186
Loans held-for-sale, net		260
Finance receivables and loans, net		296
Loans and Leases Receivable, Allowance		(1)
Total finance receivables and loans, net	2	295
Investment in operating leases, net	25	91
Premiums receivable and other insurance assets	79	77
Other assets	31	184
Impairment on assets of held-for-sale operations	(71)	(174)
Total assets	375	1,070
Unearned insurance premiums and service revenue	137	130
Reserves for insurance losses and loss adjustment expenses	14	17
Accrued expenses and other liabilities	103	190
Total liabilities	$ 254	$ 337