Finance Receivables And Loans, Net (Allowance For Credit Losses On Financing Receivables) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	$ 1,183	$ 1,427	$ 1,170	$ 1,503
Allowance for Loan and Lease Losses, Write-offs	(184)	(194)	(517)	(551)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	58	69	174	231
Allowance for Loan and Lease Losses Write-offs, Net	(126)	(125)	(343)	(320)
Allowance for Loan and Lease Losses, Provision for Loss, Net	141	105	361	236
Allowance for Loan and Lease Losses, Adjustments, Net	0	16	10	4
Loans and Leases Receivable, Allowance, Ending Balance	1,198	1,423	1,198	1,423
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses, Individually evaluated for impairment	249	220	249	220
Allowance for loan losses, Collectively evaluated for impairment	949	1,199	949	1,199
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	4	0	4
Finance receivables and loans, net	95,281	121,259	95,281	121,259	99,055
Financing Receivable, Individually Evaluated for Impairment	1,436	2,497	1,436	2,497
Financing receivable, Collectively evaluated for impairment	93,834	118,722	93,834	118,722
Financing receivable, Loans acquired with deteriorated credit quality	11	40	11	40
Consumer Loans Auto Financing Receivable [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	610	778	575	766
Allowance for Loan and Lease Losses, Write-offs	(168)	(158)	(443)	(424)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	53	62	155	184
Allowance for Loan and Lease Losses Write-offs, Net	(115)	(96)	(288)	(240)
Allowance for Loan and Lease Losses, Provision for Loss, Net	156	99	355	200
Allowance for Loan and Lease Losses, Adjustments, Net	0	22	9	77
Loans and Leases Receivable, Allowance, Ending Balance	651	803	651	803
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses, Individually evaluated for impairment	22	10	22	10
Allowance for loan losses, Collectively evaluated for impairment	629	789	629	789
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	4	0	4
Finance receivables and loans, net	56,450	70,847	56,450	70,847
Financing Receivable, Individually Evaluated for Impairment	269	97	269	97
Financing receivable, Collectively evaluated for impairment	56,170	70,710	56,170	70,710
Financing receivable, Loans acquired with deteriorated credit quality	11	40	11	40
Residential Mortgage [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	431	472	452	516
Allowance for Loan and Lease Losses, Write-offs	(16)	(33)	(71)	(119)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	5	2	13	8
Allowance for Loan and Lease Losses Write-offs, Net	(11)	(31)	(58)	(111)
Allowance for Loan and Lease Losses, Provision for Loss, Net	(12)	6	14	54
Allowance for Loan and Lease Losses, Adjustments, Net	(1)	0	(1)	(12)
Loans and Leases Receivable, Allowance, Ending Balance	407	447	407	447
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses, Individually evaluated for impairment	199	172	199	172
Allowance for loan losses, Collectively evaluated for impairment	208	275	208	275
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	0	0	0
Finance receivables and loans, net	8,772	9,787	8,772	9,787
Financing Receivable, Individually Evaluated for Impairment	916	738	916	738
Financing receivable, Collectively evaluated for impairment	7,856	9,049	7,856	9,049
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	142	177	143	221
Allowance for Loan and Lease Losses, Write-offs	0	(3)	(3)	(8)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	0	5	6	39
Allowance for Loan and Lease Losses Write-offs, Net	0	2	3	31
Allowance for Loan and Lease Losses, Provision for Loss, Net	(3)	0	(8)	(18)
Allowance for Loan and Lease Losses, Adjustments, Net	1	(6)	2	(61)
Loans and Leases Receivable, Allowance, Ending Balance	140	173	140	173
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses, Individually evaluated for impairment	28	38	28	38
Allowance for loan losses, Collectively evaluated for impairment	112	135	112	135
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	0	0	0
Finance receivables and loans, net	30,059	40,625	30,059	40,625
Financing Receivable, Individually Evaluated for Impairment	251	1,662	251	1,662
Financing receivable, Collectively evaluated for impairment	29,808	38,963	29,808	38,963
Financing receivable, Loans acquired with deteriorated credit quality	0	0	0	0
Foreign [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Finance receivables and loans, net	0		0
Foreign [Member] | Consumer Loans Auto Financing Receivable [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Allowance for Loan and Lease Losses, Write-offs		(47)		(128)
Allowance for Loan and Lease Loss, Recovery of Bad Debts		21		55
Foreign [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Allowance for Loan and Lease Losses, Write-offs			1	(2)
Allowance for Loan and Lease Loss, Recovery of Bad Debts		4		29
Segment, Discontinued Operations [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Allowance for Loan and Lease Losses, Adjustments, Net		$ 11		$ 49