Parent And Guarantor Consolidating Financial Statements (Schedule Of Condensed Consolidating Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010
Condensed Financial Statements, Captions [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
Trading assets	0		622
Investment securities	13,366		15,135
Loans held-for-sale, net	2,000		8,557
Finance receivables and loans, net	119,913		114,755
Loans to bank subsidiary	0		0
Loans to nonbank subsidiary	0		0
Allowance for loan losses	(1,427)		(1,503)
Total finance receivables and loans, net	118,486		113,252
Investment in operating leases, net	11,197		9,275
Receivables from bank subsidiary	0		0
Receivables from nonbank subsidiary	0		0
Investment in bank subsidiaries	0		0
Investment in nonbank subsidiaries	0		0
Mortgage servicing rights	1,105	2,595	2,519	3,701	3,774	3,738
Premiums receivable and other insurance assets	1,887		1,853
Other assets	14,010		18,741
Total assets	178,560		184,059	178,889
Noninterest-bearing	2,411		2,029
Interest-bearing	45,581		43,021
Total deposit liabilities	47,992		45,050
Short-term borrowings	6,010		7,680
Long-term debt	91,096		92,794
Interest payable	1,552		1,587
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
Total equity	18,363		19,371
Total liabilities and equity	178,560		184,059
Assets of operations held-for-sale	383		1,070
Debt Payable To Nonbank Subsidiaries	0		0
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	0		0
Liabilities of operations held-for-sale	241		337
Intercompany [Member]
Condensed Financial Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and Due from Banks	1,242		1,413
Interest-bearing Deposits in Banks and Other Financial Institutions	8,295		4,848
Total cash and cash equivalents	9,537		6,261	7,223		4,665
Trading assets			0
Investment securities	0		0
Loans held-for-sale, net	623		425
Finance receivables and loans, net	18,206		15,151
Loans to bank subsidiary	2,375		4,920
Loans to nonbank subsidiary	3,877		5,448
Allowance for loan losses	(261)		(245)
Total finance receivables and loans, net	24,197		25,274
Investment in operating leases, net	456		928
Receivables from bank subsidiary	353		82
Receivables from nonbank subsidiary	251		1,070
Investment in bank subsidiaries	13,636		13,061
Investment in nonbank subsidiaries	16,006		17,433
Mortgage servicing rights	0		0
Premiums receivable and other insurance assets	0		0
Other assets	2,859		2,664
Total assets	67,898		67,024
Noninterest-bearing	0		0
Interest-bearing	1,524		1,768
Total deposit liabilities	1,524		1,768
Short-term borrowings	2,958		2,756
Long-term debt	40,898		39,524
Interest payable	1,207		1,167
Unearned insurance premiums and service revenue	0		0
Reserves for insurance losses and loss adjustment expenses	0		0
Accrued expenses and other liabilities	1,015		559
Total liabilities	49,535		47,653
Total equity	18,363		19,371
Total liabilities and equity	67,898		67,024
Assets of operations held-for-sale	(20)		(174)
Debt Payable To Nonbank Subsidiaries	1,041		574
Payables to Bank Subsidiaries	419		39
Payables to Nonbank Subsidiaries	473		1,266
Liabilities of operations held-for-sale	0		0
Parent [Member] | Intercompany [Member]
Condensed Financial Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and Due from Banks	0		0
Interest-bearing Deposits in Banks and Other Financial Institutions	10		14
Total cash and cash equivalents	10		14	18		1
Trading assets			0
Investment securities	0		0
Loans held-for-sale, net	0		0
Finance receivables and loans, net	390		476
Loans to bank subsidiary	0		0
Loans to nonbank subsidiary	124		356
Allowance for loan losses	(1)		(2)
Total finance receivables and loans, net	513		830
Investment in operating leases, net	0		0
Receivables from bank subsidiary	0		0
Receivables from nonbank subsidiary	292		327
Investment in bank subsidiaries	13,636		13,061
Investment in nonbank subsidiaries	3,966		3,809
Mortgage servicing rights	0		0
Premiums receivable and other insurance assets	0		0
Other assets	2		3
Total assets	18,419		18,044
Noninterest-bearing	0		0
Interest-bearing	0		0
Total deposit liabilities	0		0
Short-term borrowings	145		136
Long-term debt	186		214
Interest payable	5		3
Unearned insurance premiums and service revenue	0		0
Reserves for insurance losses and loss adjustment expenses	0		0
Accrued expenses and other liabilities	300		323
Total liabilities	818		1,169
Total equity	17,601		16,875
Total liabilities and equity	18,419		18,044
Assets of operations held-for-sale	0		0
Debt Payable To Nonbank Subsidiaries	181		492
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	1		1
Liabilities of operations held-for-sale	0		0
Guarantor Subsidiaries [Member] | Intercompany [Member]
Condensed Financial Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and Due from Banks	864		1,062
Interest-bearing Deposits in Banks and Other Financial Institutions	5,715		5,698
Total cash and cash equivalents	7,574		7,276	7,965		7,508
Trading assets			622
Investment securities	13,366		15,135
Loans held-for-sale, net	1,377		8,132
Finance receivables and loans, net	101,317		99,128
Loans to bank subsidiary	0		0
Loans to nonbank subsidiary	227		550
Allowance for loan losses	(1,165)		(1,256)
Total finance receivables and loans, net	100,379		98,422
Investment in operating leases, net	10,741		8,347
Receivables from bank subsidiary	0		0
Receivables from nonbank subsidiary	202		577
Investment in bank subsidiaries	0		0
Investment in nonbank subsidiaries	0		0
Mortgage servicing rights	1,105		2,519
Premiums receivable and other insurance assets	1,887		1,853
Other assets	11,967		16,712
Total assets	149,001		160,839
Noninterest-bearing	2,411		2,029
Interest-bearing	44,057		41,253
Total deposit liabilities	46,468		43,282
Short-term borrowings	2,907		4,788
Long-term debt	50,012		53,056
Interest payable	340		417
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	9,700		13,839
Total liabilities	119,358		130,349
Total equity	29,643		30,490
Total liabilities and equity	149,001		160,839
Assets of operations held-for-sale	403		1,244
Debt Payable To Nonbank Subsidiaries	6,376		10,724
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	206		750
Liabilities of operations held-for-sale	241		337
Non-Guarantor Subsidiaries [Member] | Intercompany [Member]
Condensed Financial Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	995		516
Consolidation, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and Due from Banks	0		0
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Total cash and cash equivalents	(995)		(516)	(305)		(504)
Trading assets			0
Investment securities	0		0
Loans held-for-sale, net	0		0
Finance receivables and loans, net	0		0
Loans to bank subsidiary	(2,375)		(4,920)
Loans to nonbank subsidiary	(4,228)		(6,354)
Allowance for loan losses	0		0
Total finance receivables and loans, net	(6,603)		(11,274)
Investment in operating leases, net	0		0
Receivables from bank subsidiary	(353)		(82)
Receivables from nonbank subsidiary	(745)		(1,974)
Investment in bank subsidiaries	(27,272)		(26,122)
Investment in nonbank subsidiaries	(19,972)		(21,242)
Mortgage servicing rights	0		0
Premiums receivable and other insurance assets	0		0
Other assets	(818)		(638)
Total assets	(56,758)		(61,848)
Noninterest-bearing	0		0
Interest-bearing	0		0
Total deposit liabilities	0		0
Short-term borrowings	0		0
Long-term debt	0		0
Interest payable	0		0
Unearned insurance premiums and service revenue	0		0
Reserves for insurance losses and loss adjustment expenses	0		0
Accrued expenses and other liabilities	(817)		(637)
Total liabilities	(9,514)		(14,483)
Total equity	(47,244)		(47,365)
Total liabilities and equity	(56,758)		(61,848)
Assets of operations held-for-sale	0		0
Debt Payable To Nonbank Subsidiaries	(7,598)		(11,790)
Payables to Bank Subsidiaries	(419)		(39)
Payables to Nonbank Subsidiaries	(680)		(2,017)
Liabilities of operations held-for-sale	0		0
Consolidation, Eliminations [Member] | Intercompany [Member]
Condensed Financial Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	$ (995)		$ (516)