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, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	$ 1,960	$ 1,346	$ 2,000	$ 1,417
Consumer Loans Auto Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	1,960	1,318	1,960	1,318
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	0	28	40	93
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	$ 0	$ 0	$ 0	$ 6