Parent And Guarantor Consolidating Financial Statements (Schedule Of Condensed Consolidating Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	$ 1,318		$ 1,315
Interest-bearing Deposits in Banks and Other Financial Institutions	4,381		4,216
Total cash and cash equivalents	5,699		5,531	6,549		7,513
Investment securities	16,714		17,083
Loans held-for-sale, net	3		35
Finance receivables and loans, net	99,518		100,328	95,281
Loans to bank subsidiary	0		0
Loans to nonbank subsidiary	0		0
Allowance for loan losses	(1,113)	(1,171)	(1,208)	(1,198)	(1,183)	(1,170)
Total finance receivables and loans, net	98,405		99,120
Investment in operating leases, net	19,341		17,680
Receivables from bank subsidiary	0		0
Receivables from nonbank subsidiary	0		0
Investment in bank subsidiaries	0		0
Investment in nonbank subsidiaries	0		0
Premiums receivable and other insurance assets	1,678		1,613
Other Assets	6,752		9,589
Assets of operations held-for-sale	603		516
Total assets	149,195		151,167	150,556
Noninterest-bearing deposit liabilities	73		60
Interest-bearing deposit liabilities	56,778		53,290
Total deposit liabilities	56,851		53,350
Short-term borrowings	5,255		8,545
Long-term debt	67,299		69,465
Debt Payable To Nonbank Subsidiaries	0		0
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	0		0
Interest payable	542		888
Unearned insurance premiums and service revenue	2,369		2,314
Accrued expenses and other liabilities	1,689		2,397
Total liabilities	134,005		136,959
Total equity	15,190		14,208	19,061		19,898
Total liabilities and equity	149,195		151,167
Parent [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	932		979
Interest-bearing Deposits in Banks and Other Financial Institutions	1,300		1,951
Total cash and cash equivalents	2,232		2,930	3,022		3,977
Investment securities	0		0
Loans held-for-sale, net	0		0
Finance receivables and loans, net	4,757		6,673
Loans to bank subsidiary	1,300		600
Loans to nonbank subsidiary	5,603		4,207
Allowance for loan losses	(104)		(131)
Total finance receivables and loans, net	11,556		11,349
Investment in operating leases, net	0		3,172
Receivables from bank subsidiary	518		236
Receivables from nonbank subsidiary	271		439
Investment in bank subsidiaries	15,770		14,916
Investment in nonbank subsidiaries	9,730		10,029
Premiums receivable and other insurance assets	0		0
Other Assets	4,789		4,691
Assets of operations held-for-sale	603		516
Total assets	45,469		48,278
Noninterest-bearing deposit liabilities	0		0
Interest-bearing deposit liabilities	368		440
Total deposit liabilities	368		440
Short-term borrowings	3,376		3,225
Long-term debt	22,777		25,819
Debt Payable To Nonbank Subsidiaries	2,190		2,334
Payables to Bank Subsidiaries	170		197
Payables to Nonbank Subsidiaries	573		666
Interest payable	279		709
Unearned insurance premiums and service revenue	0		0
Accrued expenses and other liabilities	546		680
Total liabilities	30,279		34,070
Total equity	15,190		14,208
Total liabilities and equity	45,469		48,278
Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	0		37
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Total cash and cash equivalents	0		37	29		0
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		0
Investment in bank subsidiaries	15,770		14,916
Investment in nonbank subsidiaries	11		68
Premiums receivable and other insurance assets	0		0
Other Assets	0		0
Assets of operations held-for-sale	0		0
Total assets	15,781		15,021
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	82		93
Total liabilities	82		93
Total equity	15,699		14,928
Total liabilities and equity	15,781		15,021
Non-Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	386		299
Interest-bearing Deposits in Banks and Other Financial Institutions	3,081		2,265
Total cash and cash equivalents	3,880		2,974	3,982		4,027
Investment securities	16,714		17,083
Loans held-for-sale, net	3		35
Finance receivables and loans, net	94,761		93,655
Loans to bank subsidiary	0		0
Loans to nonbank subsidiary	1,777		1,925
Allowance for loan losses	(1,009)		(1,077)
Total finance receivables and loans, net	95,529		94,503
Investment in operating leases, net	19,341		14,508
Receivables from bank subsidiary	0		0
Receivables from nonbank subsidiary	77		588
Investment in bank subsidiaries	0		0
Investment in nonbank subsidiaries	0		0
Premiums receivable and other insurance assets	1,698		1,634
Other Assets	4,399		6,880
Assets of operations held-for-sale	0		0
Total assets	141,641		138,205
Noninterest-bearing deposit liabilities	73		60
Interest-bearing deposit liabilities	56,410		52,850
Total deposit liabilities	56,483		52,910
Short-term borrowings	1,879		5,320
Long-term debt	44,522		43,646
Debt Payable To Nonbank Subsidiaries	6,903		4,808
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	142		421
Interest payable	263		179
Unearned insurance premiums and service revenue	2,369		2,314
Accrued expenses and other liabilities	3,497		3,606
Total liabilities	116,058		113,204
Total equity	25,583		25,001
Total liabilities and equity	141,641		138,205
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	(413)		(410)	(484)		(491)
Investment securities	0		0
Loans held-for-sale, net	0		0
Finance receivables and loans, net	0		0
Loans to bank subsidiary	(1,300)		(600)
Loans to nonbank subsidiary	(7,380)		(6,132)
Allowance for loan losses	0		0
Total finance receivables and loans, net	(8,680)		(6,732)
Investment in operating leases, net	0		0
Receivables from bank subsidiary	(518)		(236)
Receivables from nonbank subsidiary	(348)		(1,027)
Investment in bank subsidiaries	(31,540)		(29,832)
Investment in nonbank subsidiaries	(9,741)		(10,097)
Premiums receivable and other insurance assets	(20)		(21)
Other Assets	(2,436)		(1,982)
Assets of operations held-for-sale	0		0
Total assets	(53,696)		(50,337)
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	(9,093)		(7,142)
Payables to Bank Subsidiaries	(170)		(197)
Payables to Nonbank Subsidiaries	(715)		(1,087)
Interest payable	0		0
Unearned insurance premiums and service revenue	0		0
Accrued expenses and other liabilities	(2,436)		(1,982)
Total liabilities	(12,414)		(10,408)
Total equity	(41,282)		(39,929)
Total liabilities and equity	(53,696)		(50,337)
Fair Value Option Election, Fair Value [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Finance receivables and loans, net	99,518		100,328
Affiliated Entity [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Affiliated Entity [Member] | Parent [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Affiliated Entity [Member] | Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Affiliated Entity [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	413		410
Affiliated Entity [Member] | Consolidation, Eliminations [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	$ (413)		$ (410)