Finance Receivables And Loans, Net (Schedule Of Sales Of Financing Receivables And Loans) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	$ 27	$ 1,960	$ 45	$ 2,000
Consumer Loans Auto Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	0	1,960	0	1,960
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	0	0	0	40
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	$ 27	$ 0	$ 45	$ 0