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Investments (Tables)
12 Months Ended
Dec. 31, 2011
Notes to Financial Statements [Abstract]  
Available for Sale Securities
          As of December 31, 2011
          Amortized Gross Unrealized Fair
          Cost Gains Losses OTTI Value
Fixed maturity securities:              
 Corporate bonds$ 53,661 $ 6,185 $ 517 $ 68 $ 59,261
 U.S. Government bonds  439   55   -   -   494
 Foreign government bonds  668   65   -   -   733
 RMBS  7,690   548   73   126   8,039
 CMBS  1,642   73   106   9   1,600
 CDOs  121   -   19   -   102
 State and municipal bonds  3,490   566   9   -   4,047
 Hybrid and redeemable preferred securities  1,277   50   170   -   1,157
 VIEs' fixed maturity securities  673   27   -   -   700
  Total fixed maturity securities  69,661   7,569   894   203   76,133
Equity securities  135   16   12   -   139
   Total AFS securities $ 69,796 $ 7,585 $ 906 $ 203 $ 76,272

          As of December 31, 2010
          Amortized Gross Unrealized Fair
          Cost Gains Losses OTTI Value
Fixed maturity securities:              
 Corporate bonds$ 48,863 $ 3,571 $ 607 $ 87 $ 51,740
 U.S. Government bonds  150   17   2   -   165
 Foreign government bonds  473   38   3   -   508
 RMBS  8,673   430   119   146   8,838
 CMBS  2,144   95   180   6   2,053
 CDOs  174   22   13   9   174
 State and municipal bonds  3,222   27   94   -   3,155
 Hybrid and redeemable preferred securities  1,476   56   135   -   1,397
 VIEs' fixed maturity securities  570   14   -   -   584
  Total fixed maturity securities  65,745   4,270   1,153   248   68,614
Equity securities  179   25   7   -   197
   Total AFS securities $ 65,924 $ 4,295 $ 1,160 $ 248 $ 68,811

       As of December 31, 2011 
       Amortized Fair 
       Cost Value 
Due in one year or less$ 2,342 $ 2,378 
Due after one year through five years  12,418   13,288 
Due after five years through ten years  22,456   24,593 
Due after ten years  22,992   26,133 
 Subtotal  60,208   66,392 
MBS  9,332   9,639 
CDOs  121   102 
  Total fixed maturity AFS securities $ 69,661 $ 76,133 

          As of December 31, 2011
          Less Than or Equal Greater Than  
          to Twelve Months Twelve Months Total
            Gross    Gross    Gross
            Unrealized   Unrealized   Unrealized
          Fair Losses and Fair Losses and Fair Losses and
          Value OTTI Value OTTI Value OTTI
Fixed maturity securities:                 
 Corporate bonds$ 2,848 $ 162 $ 1,452 $ 423 $ 4,300 $ 585
 RMBS  565   125   429   74   994   199
 CMBS  178   15   146   100   324   115
 CDOs  9   1   80   18   89   19
 State and municipal bonds  31   -   30   9   61   9
 Hybrid and redeemable                  
  preferred securities  324   23   353   147   677   170
   Total fixed maturity securities  3,955   326   2,490   771   6,445   1,097
Equity securities  38   12   -   -   38   12
    Total AFS securities$ 3,993 $ 338 $ 2,490 $ 771 $ 6,483 $ 1,109
                           
Total number of AFS securities in an unrealized loss position   897

          As of December 31, 2010
          Less Than or Equal Greater Than  
          to Twelve Months Twelve Months Total
            Gross    Gross    Gross
            Unrealized   Unrealized   Unrealized
          Fair Losses and Fair Losses and Fair Losses and
          Value OTTI Value OTTI Value OTTI
Fixed maturity securities:                 
 Corporate bonds$ 5,271 $ 297 $ 2,007 $ 397 $ 7,278 $ 694
 U.S. Government bonds  28   2   2   -   30   2
 Foreign government bonds  19   -   9   3   28   3
 RMBS  655   126   750   139   1,405   265
 CMBS  75   8   304   178   379   186
 CDOs  -   -   147   22   147   22
 State and municipal bonds  1,889   84   27   10   1,916   94
 Hybrid and redeemable                  
  preferred securities  203   10   568   125   771   135
   Total fixed maturity securities  8,140   527   3,814   874   11,954   1,401
Equity securities  60   7   -   -   60   7
    Total AFS securities$ 8,200 $ 534 $ 3,814 $ 874 $ 12,014 $ 1,408
                           
Total number of AFS securities in an unrealized loss position   1,237

     As of December 31, 2011
     Amortized Fair Unrealized
     Cost Value Loss
Total        
AFS securities backed by pools of residential mortgages$ 2,023 $ 1,553 $ 470
AFS securities backed by pools of commercial mortgages  472   344   128
 Total$ 2,495 $ 1,897 $ 598
             
Subject to Detailed Analysis        
AFS securities backed by pools of residential mortgages$ 2,015 $ 1,545 $ 470
AFS securities backed by pools of commercial mortgages  126   61   65
 Total$ 2,141 $ 1,606 $ 535

     As of December 31, 2010
     Amortized Fair Unrealized
     Cost Value Loss
Total        
AFS securities backed by pools of residential mortgages$ 2,539 $ 2,006 $ 533
AFS securities backed by pools of commercial mortgages  611   410   201
 Total$ 3,150 $ 2,416 $ 734
             
Subject to Detailed Analysis        
AFS securities backed by pools of residential mortgages$ 2,303 $ 1,776 $ 527
AFS securities backed by pools of commercial mortgages  185   76   109
 Total$ 2,488 $ 1,852 $ 636

      As of December 31, 2011 
               Number
      Fair Gross Unrealized of
      Value Losses OTTI Securities (1)
Less than six months$ 385 $ 125 $ 31   56 
Six months or greater, but less than nine months  53   30   12   18 
Nine months or greater, but less than twelve months  2   -   1   7 
Twelve months or greater  615   470   111   175 
 Total$ 1,055 $ 625 $ 155   256 

      As of December 31, 2010 
               Number
      Fair Gross Unrealized of
      Value Losses OTTI Securities (1)
Less than six months$ 170 $ 73 $ 5   41 
Six months or greater, but less than nine months  60   22   -   13 
Nine months or greater, but less than twelve months  42   17   1   13 
Twelve months or greater  929   520   184   224 
 Total$ 1,201 $ 632 $ 190   291 

         For the Years Ended December 31,
         2011 2010 2009
Balance as of beginning-of-year$ 319 $ 268 $ -
 Cumulative effect from adoption of new accounting standard  -   -   31
 Increases attributable to:        
  Credit losses on securities for which an OTTI was not previously recognized  55   14   267
  Credit losses on securities for which an OTTI was previously recognized  71   65   -
 Decreases attributable to:        
  Securities sold  (55)   (28)   (30)
    Balance as of end-of-year$ 390 $ 319 $ 268

     As of December 31, 2011
       Gross Unrealized   OTTI in
     Amortized   Losses and Fair Credit
     Cost Gains OTTI Value Losses
Corporate bonds$ 169 $ 1 $ 67 $ 103 $ 51
RMBS  690   1   128   563   301
CMBS  17   -   10   7   38
 Total$ 876 $ 2 $ 205 $ 673 $ 390
Trading securities at fair value
            As of December 31,
            2011 2010
Fixed maturity securities:     
 Corporate bonds$ 1,908 $ 1,801
 U.S. Government bonds  376   362
 Foreign government bonds  39   29
 RMBS  244   255
 CMBS  31   67
 CDOs  4   5
 State and municipal bonds  26   24
 Hybrid and redeemable preferred securities  45   51
  Total fixed maturity securities  2,673   2,594
Equity securities  2   2
   Total trading securities$ 2,675 $ 2,596
Net investment income
        For the Years Ended December 31,
        2011 2010 2009
Fixed maturity AFS securities$ 3,842 $ 3,694 $ 3,474
VIEs' fixed maturity AFS securities  14   14   -
Equity AFS securities  5   6   8
Trading securities  154   157   159
Mortgage loans on real estate  408   424   462
Real estate  22   24   18
Standby real estate equity commitments  1   1   1
Policy loans  165   169   172
Invested cash  4   7   15
Commercial mortgage loan prepayment        
 and bond makewhole premiums  82   67   24
Alternative investments  90   93   (55)
Consent fees  3   8   5
Other investments  (27)   (3)   9
  Investment income  4,763   4,661   4,292
Investment expense  (111)   (120)   (114)
   Net investment income$ 4,652 $ 4,541 $ 4,178
Realized gain (loss) related to certain investments
        For the Years Ended December 31,
        2011 2010 2009
Fixed maturity AFS securities:        
 Gross gains$ 86 $ 107 $ 161
 Gross losses  (227)   (248)   (709)
Equity AFS securities:        
 Gross gains  12   9   6
 Gross losses  -   (3)   (27)
Gain (loss) on other investments  (9)   (53)   (130)
Associated amortization of DAC, VOBA, DSI and DFEL         
 and changes in other contract holder funds  (13)   8   161
  Total realized gain (loss) related to certain investments$ (151) $ (180) $ (538)
OTTI Recognized in Net Income (Loss) and OCI
            For the Years Ended December 31,
            2011 2010 2009
OTTI Recognized in Net Income (Loss)        
Fixed maturity securities:        
 Corporate bonds$ (14) $ (90) $ (214)
 RMBS  (79)   (65)   (250)
 CMBS  (57)   (41)   -
 CDOs  (1)   (1)   (39)
 Hybrid and redeemable preferred securities  (2)   (5)   (67)
  Total fixed maturity securities  (153)   (202)   (570)
Equity securities  -   (3)   (27)
   Gross OTTI recognized in net income (loss)  (153)   (205)   (597)
   Associated amortization of DAC, VOBA, DSI and DFEL  35   53   205
    Net OTTI recognized in net income (loss), pre-tax$ (118) $ (152) $ (392)
                    
Portion of OTTI Recognized in OCI        
Gross OTTI recognized in OCI$ 58 $ 98 $ 357
Change in DAC, VOBA, DSI and DFEL  (11)   (10)   (82)
 Net portion of OTTI recognized in OCI, pre-tax$ 47 $ 88 $ 275
Payables for collateral on investments
        As of December 31, 2011 As of December 31, 2010
        Carrying Fair Carrying Fair
        Value Value Value Value
Collateral payable held for derivative investments (1)$ 2,980 $ 2,980 $ 800 $ 800
Securities pledged under securities lending agreements (2)  200   193   199   192
Securities pledged under reverse repurchase agreements (3)  280   294   280   294
Securities pledged for Term Asset-Backed Securities            
 Loan Facility ("TALF") (4)  173   199   280   318
Securities pledged for Federal Home Loan Bank of           
 Indianapolis Securities ("FHLBI") (5)  100   142   100   110
  Total payables for collateral on investments$ 3,733 $ 3,808 $ 1,659 $ 1,714

        For the Years Ended December 31,
        2011 2010 2009
Collateral payable held for derivative investments$ 2,180 $ 183 $ (2,192)
Securities pledged under securities lending agreements  1   (302)   74
Securities pledged under reverse repurchase agreements  -   (64)   (126)
Securities pledged for TALF  (107)   (65)   345
Securities pledged for FHLBI  -   -   100
 Total increase (decrease) in payables for collateral on investments$ 2,074 $ (248) $ (1,799)
Schedule of impaired mortgage loans
       As of December 31,
       2011 2010
Current$ 6,858 $ 6,697
60 to 90 days past due  26   8
Greater than 90 days past due  76   40
Valuation allowance associated with impaired mortgage loans on real estate  (31)   (13)
Unamortized premium (discount)  13   20
 Total carrying value$ 6,942 $ 6,752

       As of December 31,
       2011 2010
Number of impaired mortgage loans on real estate 12  9
            
Principal balance of impaired mortgage loans on real estate$ 100 $ 75
Valuation allowance associated with impaired mortgage loans on real estate  (31)   (13)
 Carrying value of impaired mortgage loans on real estate$ 69 $ 62

      For the Years Ended December 31,
      2011 2010 2009
Average carrying value for impaired mortgage loans on real estate$ 57 $ 54 $ 33
Interest income recognized on impaired mortgage loans on real estate  2   3   1
Interest income collected on impaired mortgage loans on real estate  2   3   1

   As of December 31, 2011 As of December 31, 2010
         Debt-       Debt-
         Service       Service
   Principal % of  Coverage Principal % of  Coverage
Loan-to-ValueAmount Total Ratio Amount Total Ratio
Less than 65%$ 5,338  76.7% 1.61 $ 4,863  72.1% 1.62
65% to 74%  1,198  17.2% 1.37   1,484  22.0% 1.40
75% to 100%  308  4.4% 0.92   179  2.7% 0.85
Greater than 100%  116  1.7% 0.36   219  3.2% 1.06
 Total mortgage loans on real estate$ 6,960  100.0%   $ 6,745  100.0%