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	Jun. 30, 2012	Dec. 31, 2011	Jun. 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	$ 2,106	$ 2,475
Interest-bearing Deposits in Banks and Other Financial Institutions	14,020	10,560
Total cash and cash equivalents	16,126	13,035	14,901	11,670
Available-for-sale Securities	13,366	15,135
Loans held-for-sale, net	2,000	8,557
Finance receivables and loans, net	119,913	114,755
Loans and Leases Receivable, Allowance	(1,427)	(1,503)
Total finance receivables and loans, net	118,486	113,252
Investment in operating leases, net	11,197	9,275
Premiums receivable and other insurance assets	1,887	1,853
Other assets	14,010	18,741
Total assets	178,560	184,059	178,889
Unearned insurance premiums and service revenue	2,631	2,576
Reserves for insurance losses and loss adjustment expenses	477	580
Accrued expenses and other liabilities	10,198	14,084
Total liabilities	160,197	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	2	4
Interest-bearing Deposits in Banks and Other Financial Institutions	76	54
Total cash and cash equivalents	78	58
Available-for-sale Securities	177	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	74	77
Other assets	19	14
Impairment on assets of held-for-sale operations	(36)	0
Total assets	312	335
Unearned insurance premiums and service revenue	130	130
Reserves for insurance losses and loss adjustment expenses	15	17
Accrued expenses and other liabilities	89	82
Total liabilities	234	229
International Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Due from Banks	27	55
Interest-bearing Deposits in Banks and Other Financial Institutions	6	38
Total cash and cash equivalents	33	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	3	10
Investment in operating leases, net	40	91
Premiums receivable and other insurance assets	0	0
Other assets	15	30
Impairment on assets of held-for-sale operations	(20)	(174)
Total assets	71	50
Unearned insurance premiums and service revenue	0	0
Reserves for insurance losses and loss adjustment expenses	0	0
Accrued expenses and other liabilities	7	28
Total liabilities	7	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	29	59
Interest-bearing Deposits in Banks and Other Financial Institutions	82	92
Total cash and cash equivalents	111	151
Available-for-sale Securities	177	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	3	295
Investment in operating leases, net	40	91
Premiums receivable and other insurance assets	74	77
Other assets	34	184
Impairment on assets of held-for-sale operations	(56)	(174)
Total assets	383	1,070
Unearned insurance premiums and service revenue	130	130
Reserves for insurance losses and loss adjustment expenses	15	17
Accrued expenses and other liabilities	96	190
Total liabilities	$ 241	$ 337