Parent And Guarantor Consolidating Financial Statements (Schedule Of Condensed Consolidating Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	$ 1,063		$ 1,073
Interest-bearing Deposits in Banks and Other Financial Institutions	5,486		6,440
Total cash and cash equivalents	6,549		7,513	17,157		13,035
Investment securities	17,967		14,178
Loans held-for-sale, net	82		2,576
Finance receivables and loans, net	95,281		99,055	121,259
Loans to bank subsidiary	0		0
Loans to nonbank subsidiary	0		0
Allowance for loan losses	(1,198)	(1,183)	(1,170)	(1,423)	(1,427)	(1,503)
Total finance receivables and loans, net	94,083		97,885
Investment in operating leases, net	17,254		13,550
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	0	0	952	902	1,105	2,519
Premiums receivable and other insurance assets	1,649		1,609
Other Assets	7,059		11,908
Assets of operations held-for-sale	5,913		32,176
Total assets	150,556		182,347	182,482
Noninterest-bearing deposit liabilities	66		1,977
Interest-bearing deposit liabilities	51,965		45,938
Total deposit liabilities	52,031		47,915
Short-term borrowings	6,015		7,461
Long-term debt	60,701		74,561
Debt Payable To Nonbank Subsidiaries	0		0
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	0		0
Interest payable	978		932
Unearned insurance premiums and service revenue	2,332		2,296
Accrued expenses and other liabilities	4,836		6,585
Liabilities of operations held-for-sale	4,602		22,699
Total liabilities	131,495		162,449
Total equity	19,061		19,898	18,674		19,280
Total liabilities and equity	150,556		182,347
Parent [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	695		729
Interest-bearing Deposits in Banks and Other Financial Institutions	2,251		3,204
Total cash and cash equivalents	3,022		3,972	6,877		6,261
Investment securities	0		0
Loans held-for-sale, net	0		0
Finance receivables and loans, net	17,118		12,486
Loans to bank subsidiary	900		1,600
Loans to nonbank subsidiary	3,866		3,514
Allowance for loan losses	(303)		(170)
Total finance receivables and loans, net	21,581		17,430
Investment in operating leases, net	3,112		2,003
Receivables from bank subsidiary	164		677
Receivables from nonbank subsidiary	365		315
Investment in bank subsidiaries	14,740		14,288
Investment in nonbank subsidiaries	11,235		19,180
Mortgage servicing rights			0
Premiums receivable and other insurance assets	0		0
Other Assets	3,247		2,514
Assets of operations held-for-sale	656		855
Total assets	58,122		61,234
Noninterest-bearing deposit liabilities	0		0
Interest-bearing deposit liabilities	550		983
Total deposit liabilities	550		983
Short-term borrowings	3,200		3,094
Long-term debt	27,986		32,342
Debt Payable To Nonbank Subsidiaries	2,205		530
Payables to Bank Subsidiaries	303		752
Payables to Nonbank Subsidiaries	636		674
Interest payable	717		748
Unearned insurance premiums and service revenue	0		0
Accrued expenses and other liabilities	3,464		2,187
Liabilities of operations held-for-sale	0		26
Total liabilities	39,061		41,336
Total equity	19,061		19,898
Total liabilities and equity	58,122		61,234
Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	29		0
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Total cash and cash equivalents	29		0	2		14
Investment securities	0		0
Loans held-for-sale, net	0		0
Finance receivables and loans, net	0		0
Loans to bank subsidiary	0		0
Loans to nonbank subsidiary	0		0
Allowance for loan losses	0		0
Total finance receivables and loans, net	0		0
Investment in operating leases, net	0		0
Receivables from bank subsidiary	0		0
Receivables from nonbank subsidiary	0		334
Investment in bank subsidiaries	14,740		14,288
Investment in nonbank subsidiaries	115		3,723
Mortgage servicing rights			0
Premiums receivable and other insurance assets	0		0
Other Assets	0		0
Assets of operations held-for-sale	0		762
Total assets	14,884		19,107
Noninterest-bearing deposit liabilities	0		0
Interest-bearing deposit liabilities	0		0
Total deposit liabilities	0		0
Short-term borrowings	0		0
Long-term debt	0		0
Debt Payable To Nonbank Subsidiaries	0		0
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	0		0
Interest payable	0		0
Unearned insurance premiums and service revenue	0		0
Accrued expenses and other liabilities	85		451
Liabilities of operations held-for-sale	0		725
Total liabilities	85		1,176
Total equity	14,799		17,931
Total liabilities and equity	14,884		19,107
Non-Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	339		344
Interest-bearing Deposits in Banks and Other Financial Institutions	3,235		3,236
Total cash and cash equivalents	3,982		4,032	11,301		7,276
Investment securities	17,967		14,178
Loans held-for-sale, net	82		2,576
Finance receivables and loans, net	78,163		86,569
Loans to bank subsidiary	0		0
Loans to nonbank subsidiary	1,797		672
Allowance for loan losses	(895)		(1,000)
Total finance receivables and loans, net	79,065		86,241
Investment in operating leases, net	14,142		11,547
Receivables from bank subsidiary	0		0
Receivables from nonbank subsidiary	616		378
Investment in bank subsidiaries	0		0
Investment in nonbank subsidiaries	0		0
Mortgage servicing rights			952
Premiums receivable and other insurance assets	1,666		1,609
Other Assets	4,182		9,968
Assets of operations held-for-sale	5,257		30,582
Total assets	126,959		162,063
Noninterest-bearing deposit liabilities	66		1,977
Interest-bearing deposit liabilities	51,415		44,955
Total deposit liabilities	51,557		46,971
Short-term borrowings	2,815		4,367
Long-term debt	32,715		42,219
Debt Payable To Nonbank Subsidiaries	4,766		5,708
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	223		278
Interest payable	261		184
Unearned insurance premiums and service revenue	2,332		2,296
Accrued expenses and other liabilities	1,657		4,517
Liabilities of operations held-for-sale	4,602		21,948
Total liabilities	100,928		128,488
Total equity	26,031		33,575
Total liabilities and equity	126,959		162,063
Consolidation, Eliminations [Member]
Condensed Balance Sheet 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	(484)		(491)	(1,023)		(516)
Investment securities	0		0
Loans held-for-sale, net	0		0
Finance receivables and loans, net	0		0
Loans to bank subsidiary	(900)		(1,600)
Loans to nonbank subsidiary	(5,663)		(4,186)
Allowance for loan losses	0		0
Total finance receivables and loans, net	(6,563)		(5,786)
Investment in operating leases, net	0		0
Receivables from bank subsidiary	(164)		(677)
Receivables from nonbank subsidiary	(981)		(1,027)
Investment in bank subsidiaries	(29,480)		(28,576)
Investment in nonbank subsidiaries	(11,350)		(22,903)
Mortgage servicing rights			0
Premiums receivable and other insurance assets	(17)		0
Other Assets	(370)		(574)
Assets of operations held-for-sale	0		(23)
Total assets	(49,409)		(60,057)
Noninterest-bearing deposit liabilities	0		0
Interest-bearing deposit liabilities	0		0
Total deposit liabilities	(76)		(39)
Short-term borrowings	0		0
Long-term debt	0		0
Debt Payable To Nonbank Subsidiaries	(6,971)		(6,238)
Payables to Bank Subsidiaries	(303)		(752)
Payables to Nonbank Subsidiaries	(859)		(952)
Interest payable	0		0
Unearned insurance premiums and service revenue	0		0
Accrued expenses and other liabilities	(370)		(570)
Liabilities of operations held-for-sale	0		0
Total liabilities	(8,579)		(8,551)
Total equity	(40,830)		(51,506)
Total liabilities and equity	(49,409)		(60,057)
Intercompany [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	0		0
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Noninterest-bearing deposit liabilities	0		0
Intercompany [Member] | Parent [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	76		39
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Noninterest-bearing deposit liabilities	0		0
Intercompany [Member] | Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	0		0
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Noninterest-bearing deposit liabilities	0		0
Intercompany [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	0		0
Interest-bearing Deposits in Banks and Other Financial Institutions	408		452
Noninterest-bearing deposit liabilities	76		39
Intercompany [Member] | Consolidation, Eliminations [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	(76)		(39)
Interest-bearing Deposits in Banks and Other Financial Institutions	(408)		(452)
Noninterest-bearing deposit liabilities	$ (76)		$ (39)