Finance Receivables And Loans, Net (Summary Of Higher-Risk Mortgage Financing Receivables and Loans) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Risks and Uncertainties [Abstract]
Interest-only mortgage loans	$ 1,853	$ 2,063
Below Market Rate Mortgages	185	192
Total higher-risk mortgage finance receivables and loans	$ 2,038	$ 2,255

Held for investment mortgage finance receivables interest only mortgage loans.

No definition available.

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