Parent And Guarantor Consolidating Financial Statements (Schedule Of Condensed Consolidating Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2009
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	$ 1,348	$ 1,315
Interest-bearing Deposits in Banks and Other Financial Institutions	4,228	4,216
Total cash and cash equivalents	5,576	5,531	7,513	13,035	13,035
Investment securities	16,137	17,083
Loans held-for-sale, net	2,003	35
Finance receivables and loans, net	99,948	100,328
Loans to bank subsidiary	0	0
Loans to nonbank subsidiary	0	0
Allowance for loan losses	(977)	(1,208)	(1,170)
Total finance receivables and loans, net	98,971	99,120
Investment in operating leases, net	19,510	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	1,695	1,613
Other Assets	7,302	9,589
Assets of operations held-for-sale	634	516
Total assets	151,828	151,167	182,347
Noninterest-bearing deposit liabilities	64	60
Interest-bearing deposit liabilities	58,158	53,290
Total deposit liabilities	58,222	53,350
Short-term borrowings	7,062	8,545
Long-term debt	66,558	69,465
Debt Payable To Nonbank Subsidiaries	0	0
Payables to Bank Subsidiaries	0	0
Payables to Nonbank Subsidiaries	0	0
Interest payable	477	888
Unearned insurance premiums and service revenue	2,375	2,314
Accrued expenses and other liabilities	1,735	2,397
Total liabilities	136,429	136,959
Total equity	15,399	14,208	19,898	19,280
Total liabilities and equity	151,828	151,167
Parent [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	986	979
Interest-bearing Deposits in Banks and Other Financial Institutions	1,300	1,951
Total cash and cash equivalents	2,286	2,930	3,977	6,511
Investment securities	0	0
Loans held-for-sale, net	3	0
Finance receivables and loans, net	4,225	6,673
Loans to bank subsidiary	625	600
Loans to nonbank subsidiary	3,500	4,207
Allowance for loan losses	(102)	(131)
Total finance receivables and loans, net	8,248	11,349
Investment in operating leases, net	0	3,172
Receivables from bank subsidiary	219	236
Receivables from nonbank subsidiary	267	439
Investment in bank subsidiaries	15,967	14,916
Investment in nonbank subsidiaries	11,559	10,029
Premiums receivable and other insurance assets	0	0
Other Assets	4,889	4,691
Assets of operations held-for-sale	634	516
Total assets	44,072	48,278
Noninterest-bearing deposit liabilities	0	0
Interest-bearing deposit liabilities	319	440
Total deposit liabilities	319	440
Short-term borrowings	3,338	3,225
Long-term debt	21,199	25,819
Debt Payable To Nonbank Subsidiaries	2,385	2,334
Payables to Bank Subsidiaries	94	197
Payables to Nonbank Subsidiaries	454	666
Interest payable	316	709
Unearned insurance premiums and service revenue	0	0
Accrued expenses and other liabilities	568	680
Total liabilities	28,673	34,070
Total equity	15,399	14,208
Total liabilities and equity	44,072	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	0	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	0
Investment in bank subsidiaries	15,967	14,916
Investment in nonbank subsidiaries	12	68
Premiums receivable and other insurance assets	0	0
Other Assets	0	0
Assets of operations held-for-sale	0	0
Total assets	15,979	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	15,897	14,928
Total liabilities and equity	15,979	15,021
Non-Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	362	299
Interest-bearing Deposits in Banks and Other Financial Institutions	2,928	2,265
Total cash and cash equivalents	3,905	2,974	4,027	7,026
Investment securities	16,137	17,083
Loans held-for-sale, net	2,000	35
Finance receivables and loans, net	95,723	93,655
Loans to bank subsidiary	0	0
Loans to nonbank subsidiary	1,770	1,925
Allowance for loan losses	(875)	(1,077)
Total finance receivables and loans, net	96,618	94,503
Investment in operating leases, net	19,510	14,508
Receivables from bank subsidiary	0	0
Receivables from nonbank subsidiary	393	588
Investment in bank subsidiaries	0	0
Investment in nonbank subsidiaries	0	0
Premiums receivable and other insurance assets	1,717	1,634
Other Assets	4,879	6,880
Assets of operations held-for-sale	0	0
Total assets	145,159	138,205
Noninterest-bearing deposit liabilities	64	60
Interest-bearing deposit liabilities	57,839	52,850
Total deposit liabilities	57,903	52,910
Short-term borrowings	3,724	5,320
Long-term debt	45,359	43,646
Debt Payable To Nonbank Subsidiaries	4,125	4,808
Payables to Bank Subsidiaries	0	0
Payables to Nonbank Subsidiaries	354	421
Interest payable	161	179
Unearned insurance premiums and service revenue	2,375	2,314
Accrued expenses and other liabilities	3,551	3,606
Total liabilities	117,552	113,204
Total equity	27,607	25,001
Total liabilities and equity	145,159	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	(615)	(410)	(491)	(516)
Investment securities	0	0
Loans held-for-sale, net	0	0
Finance receivables and loans, net	0	0
Loans to bank subsidiary	(625)	(600)
Loans to nonbank subsidiary	(5,270)	(6,132)
Allowance for loan losses	0	0
Total finance receivables and loans, net	(5,895)	(6,732)
Investment in operating leases, net	0	0
Receivables from bank subsidiary	(219)	(236)
Receivables from nonbank subsidiary	(660)	(1,027)
Investment in bank subsidiaries	(31,934)	(29,832)
Investment in nonbank subsidiaries	(11,571)	(10,097)
Premiums receivable and other insurance assets	(22)	(21)
Other Assets	(2,466)	(1,982)
Assets of operations held-for-sale	0	0
Total assets	(53,382)	(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	(6,510)	(7,142)
Payables to Bank Subsidiaries	(94)	(197)
Payables to Nonbank Subsidiaries	(808)	(1,087)
Interest payable	0	0
Unearned insurance premiums and service revenue	0	0
Accrued expenses and other liabilities	(2,466)	(1,982)
Total liabilities	(9,878)	(10,408)
Total equity	(43,504)	(39,929)
Total liabilities and equity	(53,382)	(50,337)
Fair Value Option Election, Fair Value [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Finance receivables and loans, net	99,948	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	615	410
Affiliated Entity [Member] | Consolidation, Eliminations [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	$ (615)	$ (410)