Finance Receivables And Loans, Net (Allowance For Credit Losses On Financing Receivables) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	$ 1,192	$ 1,197	$ 1,208	$ 1,170
Allowance for Loan and Lease Losses, Write-offs	(157)	(166)	(353)	(333)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	72	63	135	116
Allowance for Loan and Lease Losses Write-offs, Net	(85)	(103)	(218)	(217)
Allowance for Loan and Lease Losses, Provision for Loss, Net	63	89	200	220
Allowance for Loan and Lease Losses, Adjustments, Net	1	0	(19)	10
Loans and Leases Receivable, Allowance, Ending Balance	1,171	1,183	1,171	1,183
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses, Individually evaluated for impairment	233	262	233	262
Allowance for loan losses, Collectively evaluated for impairment	938	921	938	921
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	0	0	0
Finance receivables and loans, net	100,778	96,993	100,778	96,993	100,328
Loans and Leases Receivable, Gross, Excluding Fair Value Option Election	100,777		100,777		100,327
Financing Receivable, Individually Evaluated for Impairment	1,310	1,509	1,310	1,509
Financing receivable, Collectively evaluated for impairment	99,464	95,468	99,464	95,468
Financing receivable, Loans acquired with deteriorated credit quality	3	16	3	16
Consumer Loans Auto Financing Receivable [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	715	599	673	575
Allowance for Loan and Lease Losses, Write-offs	(143)	(133)	(323)	(275)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	60	53	119	102
Allowance for Loan and Lease Losses Write-offs, Net	(83)	(80)	(204)	(173)
Allowance for Loan and Lease Losses, Provision for Loss, Net	97	92	260	199
Allowance for Loan and Lease Losses, Adjustments, Net	0	(1)	0	9
Loans and Leases Receivable, Allowance, Ending Balance	729	610	729	610
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses, Individually evaluated for impairment	26	22	26	22
Allowance for loan losses, Collectively evaluated for impairment	703	588	703	588
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	0	0	0
Finance receivables and loans, net	58,114	56,028	58,114	56,028
Financing Receivable, Individually Evaluated for Impairment	287	268	287	268
Financing receivable, Collectively evaluated for impairment	57,824	55,744	57,824	55,744
Financing receivable, Loans acquired with deteriorated credit quality	3	16	3	16
Residential Mortgage [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	333	451	389	452
Allowance for Loan and Lease Losses, Write-offs	(10)	(31)	(25)	(55)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	2	5	5	8
Allowance for Loan and Lease Losses Write-offs, Net	(8)	(26)	(20)	(47)
Allowance for Loan and Lease Losses, Provision for Loss, Net	(25)	6	(48)	26
Allowance for Loan and Lease Losses, Adjustments, Net	2	0	(19)	0
Loans and Leases Receivable, Allowance, Ending Balance	302	431	302	431
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses, Individually evaluated for impairment	192	214	192	214
Allowance for loan losses, Collectively evaluated for impairment	110	217	110	217
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	0	0	0
Finance receivables and loans, net	7,846	9,270	7,846	9,270
Financing Receivable, Individually Evaluated for Impairment	925	936	925	936
Financing receivable, Collectively evaluated for impairment	6,921	8,334	6,921	8,334
Financing receivable, Loans acquired with deteriorated credit quality	0	0	0	0
Commercial Loan [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	144	147	146	143
Allowance for Loan and Lease Losses, Write-offs	(4)	(2)	(5)	(3)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	10	5	11	6
Allowance for Loan and Lease Losses Write-offs, Net	6	3	6	3
Allowance for Loan and Lease Losses, Provision for Loss, Net	(9)	(9)	(12)	(5)
Allowance for Loan and Lease Losses, Adjustments, Net	(1)	1	0	1
Loans and Leases Receivable, Allowance, Ending Balance	140	142	140	142
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses, Individually evaluated for impairment	15	26	15	26
Allowance for loan losses, Collectively evaluated for impairment	125	116	125	116
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	0	0	0
Finance receivables and loans, net	34,817	31,695	34,817	31,695
Financing Receivable, Individually Evaluated for Impairment	98	305	98	305
Financing receivable, Collectively evaluated for impairment	34,719	31,390	34,719	31,390
Financing receivable, Loans acquired with deteriorated credit quality	$ 0	$ 0	$ 0	$ 0