| **Summary of Significant Accounting Policies (Life Settlement Contracts) (Tables)** | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                           |
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| **Accounting Policies [Abstract]**                                                  |                                                                                                                                                                                                                                                                                                                                                                                                      |
| Life settlement contracts                                                           | December 31, 2011Number of Life Settlement Contracts Fair Value of Life Settlement  Contracts(In millions) Face Amount of Life Insurance Policies(In millions)Estimated maturity during:     201270 $16 $46201370 14 42201460 12 39201560 10 37201650 9 33Thereafter531 56 338Total841 $117 $535 |

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| - Definition
Tabular disclosure of life settlement contracts based on the remaining life expectancy for each of the first five succeeding years from the date of the statement of financial position and thereafter, as well as in the aggregate including: (a) the number of life settlement contracts, (b) the carrying value of the life settlement contracts, and (c) the face value (death benefits) of the life insurance policies underlying the contracts.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FTB85-4-1 -Paragraph 12, 16, 17, 18, 19 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 30 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6385267&loc=d3e42732-111610Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Life Settlement Contract -URI http://asc.fasb.org/extlink&oid=6516907
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