| **Accumulated Other Comprehensive Income (Loss) by Component (Tables)**  | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
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| **Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| Accumulated Other Comprehensive Income (Loss) by Component               | The table below displays the changes in Accumulated other comprehensive income (loss) by component for the year ended December 31, 2013. Net unrealized gains (losses) on investments with OTTI losses Net unrealized gains (losses) on other investments Pension and postretirement benefits Cumulative foreign currency translation adjustment TotalBalance at December 31, 2012$20 $1,371 $(721) $161 $831Other comprehensive income (loss) before reclassifications6 (658) 275 (11) (388)Amounts reclassified from accumulated other comprehensive income (loss) after tax of $0, $(10), $11, $0, and $1— 21 (20) — 1Other comprehensive income (loss) after tax of $(3), $364, $(158), $0, and $2036 (679) 295 (11) (389)Balance at December 31, 2013$26 $692 $(426) $150 $442The following table displays the components of AOCI included on the Consolidated Balance Sheet for the year ended December 31, 2012.December 312012(In millions)Tax After-taxCumulative foreign currency translation adjustment$— $161Pension and postretirement benefits387 (721)Net unrealized gains (losses) on investments with OTTI losses(11) 20Net unrealized gains (losses) on other investments(721) 1,371Accumulated other comprehensive income (loss)$(345) $831 |

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| - Definition
Tabular disclosure of the components of accumulated other comprehensive income (loss).
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669686-108580
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