Finance Receivables And Loans, Net (Redefaults) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Number of Contracts	20,497	39,271
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 712	$ 872
Financing Receivable, Modifications, Post-Modification Recorded Investment	618	673
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	6,070	2,450
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	83	51
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	38	15
Consumer Loans Auto Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Number of Contracts	19,388	36,285
Financing Receivable, Modifications, Pre-Modification Recorded Investment	297	407
Financing Receivable, Modifications, Post-Modification Recorded Investment	249	295
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	6,038	2,290
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	75	26
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	37	12
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Number of Contracts	1,092	2,969
Financing Receivable, Modifications, Pre-Modification Recorded Investment	278	436
Financing Receivable, Modifications, Post-Modification Recorded Investment	234	350
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	32	153
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	8	19
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	1	3
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Number of Contracts	17	17
Financing Receivable, Modifications, Pre-Modification Recorded Investment	137	29
Financing Receivable, Modifications, Post-Modification Recorded Investment	135	28
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	7
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	6
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
Commercial And Industrial Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Number of Contracts	8	9
Financing Receivable, Modifications, Pre-Modification Recorded Investment	37	15
Financing Receivable, Modifications, Post-Modification Recorded Investment	37	15
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	3
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
Commercial And Industrial Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0
Commercial And Industrial Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Number of Contracts	4	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	80	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	78	0
Commercial Real Estate Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Number of Contracts	5	8
Financing Receivable, Modifications, Pre-Modification Recorded Investment	20	14
Financing Receivable, Modifications, Post-Modification Recorded Investment	20	13
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	3
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 0	$ 0