Summary Of Significant Accounting Policies (Schedule Of Life Settlement Contracts, Fair Value Method) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Life Settlement Contracts, Fair Value Method, Disclosure Items [Line Items]
Number of Life Settlement Contracts	841
Fair Value of Life Settlement Contracts	$ 117
Face Amount of Life Insurance Policies	535
2012 [Member]
Life Settlement Contracts, Fair Value Method, Disclosure Items [Line Items]
Number of Life Settlement Contracts	70
Fair Value of Life Settlement Contracts	16
Face Amount of Life Insurance Policies	46
2013 [Member]
Life Settlement Contracts, Fair Value Method, Disclosure Items [Line Items]
Number of Life Settlement Contracts	70
Fair Value of Life Settlement Contracts	14
Face Amount of Life Insurance Policies	42
2014 [Member]
Life Settlement Contracts, Fair Value Method, Disclosure Items [Line Items]
Number of Life Settlement Contracts	60
Fair Value of Life Settlement Contracts	12
Face Amount of Life Insurance Policies	39
2015 [Member]
Life Settlement Contracts, Fair Value Method, Disclosure Items [Line Items]
Number of Life Settlement Contracts	60
Fair Value of Life Settlement Contracts	10
Face Amount of Life Insurance Policies	37
2016 [Member]
Life Settlement Contracts, Fair Value Method, Disclosure Items [Line Items]
Number of Life Settlement Contracts	50
Fair Value of Life Settlement Contracts	9
Face Amount of Life Insurance Policies	33
Thereafter [Member]
Life Settlement Contracts, Fair Value Method, Disclosure Items [Line Items]
Number of Life Settlement Contracts	531
Fair Value of Life Settlement Contracts	56
Face Amount of Life Insurance Policies	$ 338