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Pension and Other Postretirement Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2011
Notes to Financial Statements [Abstract]  
Obligations, funded status and assumptions
          As of or for the Years Ended December 31,
          2011 2010 2011 2010 2011 2010
          U.S. Non-U.S. Other
          Pension Benefits Pension Benefits Postretirement Benefits
Change in Plan Assets                       
Fair value as of beginning-of-year$ 918 $ 842 $ 314 $ 307 $ 37 $ 34
Actual return on plan assets  72   118   49   29   3   2
Company and participant contributions  36   31   1   -   15   15
Benefits paid  (70)   (73)   (12)   (12)   (17)   (15)
Medicare Part D subsidy  -   -   -   -   1   1
Foreign exchange translation  -   -   (2)   (10)   -   -
 Fair value as of end-of-year  956   918   350   314   39   37
                        
Change in Benefit Obligation                       
Balance as of beginning-of-year  1,093   1,050   271   289   155   151
Service cost (1)  3   3   -   -   4   3
Interest cost  58   61   15   16   7   9
Company and participant contributions  -   -   -   -   6   6
Curtailments  -   -   -   -   -   -
Actuarial (gains) losses  154   52   38   (12)   5   -
Benefits paid  (70)   (73)   (12)   (12)   (17)   (15)
Medicare Part D subsidy  -   -   -   -   1   1
Foreign exchange translation  -   -   (1)   (10)   -   -
 Balance as of end-of-year  1,238   1,093   311   271   161   155
  Funded status of the plans $ (282) $ (175) $ 39 $ 43 $ (122) $ (118)
                                 
Amounts Recognized on the                        
 Consolidated Balance Sheets                       
Other assets $ 18 $ 15 $ 39 $ 43 $ - $ -
Other liabilities   (300)   (190)   -   -   (122)   (118)
 Net amount recognized $ (282) $ (175) $ 39 $ 43 $ (122) $ (118)
                                 
Amounts Recognized in                        
 Accumulated OCI, Net of Tax                       
Net (gain) loss$ 243 $ 153 $ 33 $ 30 $ 5 $ 2
Prior service credit  -   -   -   -   (3)   (4)
 Net amount recognized $ 243 $ 153 $ 33 $ 30 $ 2 $ (2)
                                 
Rate of Increase in Compensation                       
Retiree Life Insurance Plan N/A  N/A  N/A  N/A  4.00%  4.00%
All other plans N/A  N/A  N/A  N/A  N/A  N/A
                                 
Weighted-Average Assumptions                       
Benefit obligations:                       
 Weighted-average discount rate 4.45%  5.50%  5.00%  5.70%  4.25%  5.00%
 Expected return on plan assets 7.78%  8.00%  5.40%  5.40%  6.50%  6.50%
Net periodic benefit cost:                       
 Weighted-average discount rate 5.45%  6.00%  5.70%  5.80%  5.00%  6.00%
 Expected return on plan assets 7.78%  8.00%  5.40%  5.80%  6.50%  6.50%
Health care cost trend rate
        As of or for the 
         Years Ended December 31, 
         2011 2010 2009  
Pre-65 health care cost trend rate  8.50%  9.50%  10.00%  
Post-65 health care cost trend rate  8.50%  9.50%  13.00%  
Ultimate trend rate  4.50%  5.00%  5.00%  
Year that the rate reaches the ultimate trend rate  2021  2020  2020  
Pension plans with an accumulated benefit obligation in excess of plan assets
        As of December 31, 
        2011 2010 
U.S. Plan      
Accumulated benefit obligation$ 1,118 $ 1,072 
Projected benefit obligation  1,118   1,072 
Fair value of plan assets  818   881 
Components of net periodic benefit cost
          For the Years Ended December 31,
          2011 2010 2009 2011 2010 2009
          Pension Benefits Other Postretirement Benefits
U.S. Plans                 
Service cost (1)$ 3 $ 3 $ 3 $ 4 $ 3 $ 3
Interest cost  58   61   62   7   9   8
Expected return on plan assets  (71)   (65)   (55)   (2)   (2)   (2)
Amortization of prior service cost  -   -   -   (1)   (1)   (1)
Recognized net actuarial loss (gain)  13   15   28   1   1   (2)
 Net periodic benefit expense (recovery)$ 3 $ 14 $ 38 $ 9 $ 10 $ 6
                           
Non-U.S. Plans                 
Service cost$ - $ - $ 1         
Interest cost  15   16   16         
Expected return on plan assets  (16)   (16)   (15)         
Amortization of prior service cost  -   -   1         
Recognized net actuarial loss (gain)  -   1   1         
 Net periodic benefit expense (recovery)$ (1) $ 1 $ 4         
Pension plan asset target allocations by asset category
        For the Years Ended December 31,
        2011 2010 2011 2010 2011 2010
        U.S. Plan - Employees U.S. Plan - Agents Non-U.S. Plan
Asset Class                 
Fixed maturity securities50% 50% 80% 50% 56% 65%
Common stock:                 
 Domestic equity35% 35% 14% 35% 0% 0%
 International equity15% 15% 6% 15% 0% 0%
Equity securities0% 0% 0% 0% 43% 15%
Cash and invested cash0% 0% 0% 0% 1% 20%
Fair value measurements of pension plan assets on a recurring basis
          As of December 31,
          2011  2010  2011  2010 2011 2010
          U.S.  Non-U.S. Other
          Pension Plans   Pension Plans Postretirement Benefits
Fixed maturity securities:                     
 Corporate bonds $ 370  $ 266  $ 34  $ 22 $ - $ -
 U.S. Government bonds   114    103    13    2   -   -
 Foreign government bonds   24    39    206    166   -   -
 RMBS   1    2    -    -   -   -
 CMBS   4    5    -    -   -   -
 CDOs   1    1    1    2   -   -
Common stock   418    444    57    101   -   -
Cash and invested cash   24    58    39    21   39   37
   Total  $ 956  $ 918  $ 350  $ 314 $ 39 $ 37
Estimated future benefit payments
          Pension Plans U.S. Other Postretirement Plans
          Qualified Nonqualified Qualified      
          U.S.  U.S.  Non-U.S.     Not
          Defined  Defined  Defined Reflecting   Reflecting
          Benefit  Benefit  Benefit Medicare Medicare Medicare
          Pension  Pension  Pension Part D Part D Part D
          Plans  Plans  Plans Subsidy Subsidy Subsidy
2012$ 72  $ 10  $ 12 $ 10 $ (2) $ 12
2013  70    10    13   10   (2)   12
2014  68    9    14   11   (2)   13
2015  67    11    14   11   (2)   13
2016  69    9    15   12   (2)   14
Following five years thereafter  336    44    86   59   (12)   71