Finance Receivables And Loans, Net (Schedule Of Sales Of Financing Receivables And Loans) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	$ 18	$ 40
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	0	40
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	$ 18	$ 0