|**Discontinued Operations (Tables)**                                 | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
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|**Discontinued Operations and Disposal Groups [Abstract]**           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Results of discontinued operations                                   | The results of discontinued operations reflected in the Consolidated Statements of Operations were as follows:Years ended December 31(In millions)20142013RevenuesNet earned premiums$—$—Net investment income94168Net realized investment gains311Other revenues—2Total revenues97181Claims, Benefits and ExpensesInsurance claims and policyholders' benefits75141Other operating expenses23Total claims, benefits and expenses77144Income before income tax2037Income tax expense(6)(15)Income from operations of discontinued operations, net of income tax1422Loss on sale, net of income tax benefit of $40 and $-(211)—(Loss) income from discontinued operations$(197)$22
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|Years ended December 31                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|(In millions)                                                        | 2014                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|Revenues                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Net earned premiums                                                  | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Net investment income                                                | 94                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Net realized investment gains                                        | 3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Other revenues                                                       | —                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Total revenues                                                       | 97                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Claims, Benefits and Expenses                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Insurance claims and policyholders' benefits                         | 75                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Other operating expenses                                             | 2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Total claims, benefits and expenses                                  | 77                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Income before income tax                                             | 20                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Income tax expense                                                   | (6                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Income from operations of discontinued operations, net of income tax | 14                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Loss on sale, net of income tax benefit of $40 and $-                | (211                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|(Loss) income from discontinued operations                           | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

X- ReferencesNo definition available.
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duration X- DefinitionTabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.
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