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Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2012
Notes to Financial Statements [Abstract]  
Carrying and Estimated Fair Values of Financial Instruments
          As of December 31, 2012 As of December 31, 2011
          Carrying Fair Carrying Fair
          Value Value Value Value
Assets           
AFS securities:           
 Fixed maturity securities$ 82,036 $ 82,036 $ 75,433 $ 75,433
 VIEs' fixed maturity securities  708   708   700   700
 Equity securities  157   157   139   139
Trading securities  2,554   2,554   2,675   2,675
Mortgage loans on real estate  7,029   7,704   6,942   7,608
Derivative investments  2,652   2,652   3,151   3,151
Other investments  1,098   1,098   1,069   1,069
Cash and invested cash  4,230   4,230   4,510   4,510
Separate account assets  95,373   95,373   83,477   83,477
                     
Liabilities           
Future contract benefits:           
 Indexed annuity contracts embedded derivatives  (732)   (732)   (399)   (399)
 GLB reserves embedded derivatives  (909)   (909)   (2,217)   (2,217)
Other contract holder funds:           
 Remaining guaranteed interest and similar contracts  (867)   (867)   (1,114)   (1,114)
 Account values of certain investment contracts  (28,540)   (32,688)   (27,468)   (30,812)
Short-term debt (1)  (200)   (204)   (300)   (309)
Long-term debt  (5,439)   (5,824)   (5,391)   (5,345)
Reinsurance related embedded derivatives  (215)   (215)   (168)   (168)
VIEs' liabilities - derivative instruments  (128)   (128)   (291)   (291)
Other liabilities:           
 Credit default swaps  (11)   (11)   (16)   (16)
                     
Benefit Plans' Assets (2)  1,456   1,456   1,345   1,345
Fair Value of Assets and Liabilities on a Recurring Basis
            As of December 31, 2012
            Quoted            
             Prices            
            in Active            
           Markets for Significant  Significant    
            Identical ObservableUnobservable Total
             Assets  Inputs  Inputs  Fair
            (Level 1)  (Level 2)  (Level 3)  Value
Assets               
Investments:               
 Fixed maturity AFS securities:               
  Corporate bonds $65  $ 66,446  $ 1,505  $ 68,016
  U.S. government bonds  411    30   1    442
  Foreign government bonds   -    608   46    654
  RMBS   -    6,168   3    6,171
  CMBS   -    976   27    1,003
  CDOs   -    26   154    180
  State and municipal bonds   -    4,321    32    4,353
  Hybrid and redeemable preferred securities  30    1,069   118    1,217
 VIEs' fixed maturity securities  110    598    -    708
 Equity AFS securities  44    26   87    157
 Trading securities  2    2,496   56    2,554
 Derivative investments   -    626    2,026    2,652
Cash and invested cash   -    4,230    -    4,230
Separate account assets   1,519    93,854    -    95,373
   Total assets $ 2,181  $ 181,474  $ 4,055  $ 187,710
                          
Liabilities               
Future contract benefits:               
 Indexed annuity contracts embedded derivatives $ -  $ -  $ (732)  $ (732)
 GLB reserves embedded derivatives   -    -    (909)    (909)
Long-term debt   -    (1,203)    -    (1,203)
Reinsurance related embedded derivatives   -    (215)    -    (215)
VIEs' liabilities - derivative instruments   -    -    (128)    (128)
Other liabilities:               
 Credit default swaps   -    -    (11)    (11)
   Total liabilities $ -  $ (1,418)  $ (1,780)  $ (3,198)
                
Benefit Plans' Assets $ 116  $ 1,340  $ -  $ 1,456

            As of December 31, 2011
            Quoted            
             Prices            
            in Active            
           Markets for Significant  Significant    
            Identical ObservableUnobservable Total
             Assets  Inputs  Inputs  Fair
            (Level 1)  (Level 2)  (Level 3)  Value
Assets               
Investments:               
 Fixed maturity AFS securities:               
  Corporate bonds $ 63  $ 57,310  $ 1,888  $ 59,261
  U.S. government bonds   475    18    1    494
  Foreign government bonds   -    636    97    733
  RMBS   -    7,881    158    8,039
  CMBS   -    1,566    34    1,600
  CDOs   -    -    102    102
  State and municipal bonds   -    4,047    -    4,047
  Hybrid and redeemable preferred securities   15    1,042    100    1,157
 VIEs' fixed maturity securities   108    592    -    700
 Equity AFS securities   37    46    56    139
 Trading securities   2    2,605    68    2,675
 Derivative investments   -    681    2,470    3,151
Cash and invested cash   -    4,510    -    4,510
Separate account assets   1,582    81,895    -    83,477
   Total assets $ 2,282  $ 162,829  $ 4,974  $ 170,085
                          
Liabilities               
Future contract benefits:               
 Indexed annuity contracts embedded derivatives $ -  $ -  $ (399)  $ (399)
 GLB reserves embedded derivatives   -    -    (2,217)    (2,217)
Long-term debt   -    (1,688)    -    (1,688)
Reinsurance related embedded derivatives   -    (168)    -    (168)
VIEs' liabilities - derivative instruments   -    -    (291)    (291)
Other liabilities:               
 Credit default swaps   -    -    (16)    (16)
   Total liabilities $ -  $ (1,856)  $ (2,923)  $ (4,779)
                
Benefit Plans' Assets $ 99  $ 1,246  $ -  $ 1,345
Level 3 Unobservable Input Reconciliation
            For the Year Ended December 31, 2012
                     Purchases,       
                  Gains Issuances, Transfers   
               Items (Losses) Sales, In or   
               Included in Maturities, Out   
            Beginning in OCI Settlements, of Ending
            Fair Net and  Calls,  Level 3, Fair
            Value Income Other (1)  Net  Net (2) Value
Investments: (3)                   
 Fixed maturity AFS securities:                   
  Corporate bonds$ 1,888 $ (27) $ 34  $ 266  $ (656) $ 1,505
  U.S. government bonds  1   -   -    -    -   1
  Foreign government bonds  97   -   -    (5)    (46)   46
  RMBS  158   (3)   3    (8)    (147)   3
  CMBS  34   (11)   18    (12)    (2)   27
  CDOs  102   (2)   8    61    (15)   154
  State and municipal bonds  -   -   -    32    -   32
  Hybrid and redeemable                    
   preferred securities  100   (1)   24    -    (5)   118
 Equity AFS securities  56   (8)   13    26    -   87
 Trading securities  68   3   4    (2)    (17)   56
 Derivative investments  2,470   (790)   158    188    -   2,026
Future contract benefits: (4)                   
 Indexed annuity contracts embedded                    
  derivatives  (399)   (136)   -    (197)    -   (732)
 GLB reserves embedded derivatives  (2,217)   1,308   -    -    -   (909)
VIEs' liabilities - derivative                    
 instruments (5)  (291)   163   -    -    -   (128)
Other liabilities:                   
 Credit default swaps (6)  (16)   5   -    -    -   (11)
    Total, net$ 2,051 $ 501 $ 262  $ 349  $ (888) $ 2,275

            For the Year Ended December 31, 2011
                     Purchases,      
                  Gains Issuances, Transfers   
               Items (Losses) Sales, In or   
               Included in Maturities, Out   
            Beginning in OCI Settlements, of Ending
            Fair Net and  Calls,  Level 3, Fair
            Value Income Other (1)  Net  Net (2) Value
Investments: (3)                   
 Fixed maturity AFS securities:                   
  Corporate bonds$ 1,816 $ 2 $ 42  $ (138)  $ 166 $ 1,888
  U.S. government bonds  2   -   -    (1)    -   1
  Foreign government bonds  113   -   4    (3)    (17)   97
  RMBS  119   (3)   7    35    -   158
  CMBS  109   (62)   62    (78)    3   34
  CDOs  172   19   (17)    (72)    -   102
  Hybrid and redeemable                    
   preferred securities  119   (1)   (6)    (9)    (3)   100
 Equity AFS securities  92   8   (12)    1    (33)   56
 Trading securities  76   1   3    (8)    (4)   68
 Derivative investments  1,495   495   363    117    -   2,470
Future contract benefits: (4)                   
 Indexed annuity contracts embedded                   
  derivatives  (497)   5   -    93    -   (399)
 GLB reserves embedded derivatives  (408)   (1,809)   -    -    -   (2,217)
VIEs' liabilities - derivative                    
  instruments (5)  (209)   (82)   -    -    -   (291)
Other liabilities:                   
 Credit default swaps (6)  (16)   (7)   -    7    -   (16)
    Total, net$ 2,983 $ (1,434) $ 446  $ (56)  $ 112 $ 2,051
                               
Benefit plans' assets (7)$ 40 $ 2 $ (3)  $ (39)  $ - $ -

            For the Year Ended December 31, 2010
                     Purchases,      
                  Gains Issuances, Transfers   
               Items (Losses) Sales, In or   
               Included in Maturities, Out   
            Beginning in OCI Settlements, of Ending
            Fair Net and  Calls,  Level 3, Fair
            Value Income Other (1)  Net  Net (2) Value
Investments: (3)                   
 Fixed maturity AFS securities:                   
  Corporate bonds$ 2,070 $ (42) $ 56  $ (218)  $ (50) $ 1,816
  U.S. government bonds  3   -   -    (4)    3   2
  Foreign government bonds  92   -   8    (4)    17   113
  RMBS  136   (5)   9    (17)    (4)   119
  CMBS  259   (47)   87    (72)    (118)   109
  CDOs  153   1   30    (12)    -   172
  CLNs  322   -   278    -    (600)   -
  Hybrid and redeemable                    
   preferred securities  156   3   (26)    (14)    -   119
 Equity AFS securities  88   -   8    (4)    -   92
 Trading securities  91   3   (10)    (7)    (1)   76
 Derivative investments  1,368   (151)   7    271    -   1,495
Future contract benefits: (4)                   
 Indexed annuity contracts embedded                   
  derivatives  (419)   (81)   -    3    -   (497)
 GLB reserves embedded derivatives  (676)   268   -    -    -   (408)
VIEs' liabilities - derivative                    
  instruments (5)  -   16   -    -    (225)   (209)
Other liabilities:                   
 Credit default swaps (6)  (65)   7   -    42    -   (16)
    Total, net$ 3,578 $ (28) $ 447  $ (36)  $ (978) $ 2,983
                               
Benefit plans' assets (7)$ 3 $ - $ 3  $ 34  $ - $ 40

            For the Year Ended December 31, 2012
            Issuances Sales Maturities Settlements Calls Total
Investments:                   
 Fixed maturity AFS securities:                   
  Corporate bonds$ 364 $ (30) $ (6)  $ (55)  $ (7) $ 266
  Foreign government bonds  -   -   (5)    -    -   (5)
  RMBS  -   -   (7)    (1)    -   (8)
  CMBS  -   -   -    (12)    -   (12)
  CDOs  72   -   -    (11)    -   61
  State and municipal bonds  32   -   -    -    -   32
 Equity AFS securities  26   -   -    -    -   26
 Trading securities  -   -   -    (2)    -   (2)
 Derivative investments  454   (28)   (238)    -    -   188
Future contract benefits:                   
 Indexed annuity contracts embedded                    
  derivatives  (99)   -   -    (98)    -   (197)
    Total, net$ 849 $ (58) $ (256)  $ (179)  $ (7) $ 349

                      
            Fair Valuation Significant  
            Value Technique Unobservable Inputs Input Ranges
Assets          
Investments:          
 Fixed maturity AFS and trading          
  securities        
   Corporate bonds$ 922 Discounted cash flow Liquidity/duration adjustment (1) 1.7% - 13.5%
   Foreign government bonds  46 Discounted cash flow Liquidity/duration adjustment (1) 2.3% - 5.3%
   Hybrid and redeemable         
    preferred stock  21 Discounted cash flow Liquidity/duration adjustment (1) 2.7% - 2.9%
 Equity AFS and trading        
  securities  25 Discounted cash flow Liquidity/duration adjustment (1) 4.3% - 4.5%
                      
Liabilities          
Future contract benefits:          
 Indexed annuity contracts          
  embedded derivatives  (732) Discounted cash flow Lapse rate (2) 1.0% - 15.0%
                  Mortality rate (5)   (7)
 GLB reserves embedded         
  derivatives  909 Monte Carlo simulation Long-term lapse rate (2) 1.0% - 27.0%
                  Utilization of guaranteed  
                   withdrawal (3) 90.0% - 100.0%
                  NPR (4) 0.03% - 0.54%
                  Mortality rate (5)   (7)
                  Volatility (6) 1.0% - 35.0%
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
           For the Years Ended December 31, 
           2012 2011 2010 
Investments: (1)          
 Derivative investments $ 823 $ 472 $ (162) 
Future contract benefits: (1)          
 Indexed annuity contracts embedded derivatives    (10)   (1)   44 
 GLB reserves embedded derivatives    1,472   (1,615)   419 
VIEs' liabilities - derivative instruments (1)   163   (82)   16 
Other liabilities:          
 Credit default swaps (2)   6   (8)   (12) 
  Total, net  $ 2,454 $ (1,234) $ 305 
Components of the transfers in and out of Level 3
            For the Year Ended December 31, 2011
            Issuances Sales Maturities Settlements Calls Total
Investments:                   
 Fixed maturity AFS securities:                   
  Corporate bonds$ 237 $ (216) $ (16)  $ (54)  $ (89) $ (138)
  U.S. government bonds  -   -   -    (1)    -   (1)
  Foreign government bonds  -   (2)   -    -    (1)   (3)
  RMBS  51   (1)   -    (15)    -   35
  CMBS  -   (53)   -    (24)    (1)   (78)
  CDOs  -   (33)   -    (39)    -   (72)
  Hybrid and redeemable preferred                   
   securities  9   (18)   -    -    -   (9)
 Equity AFS securities  19   (18)   -    -    -   1
 Trading securities  -   (3)   -    (5)    -   (8)
 Derivative investments  396   (2)   (277)    -    -   117
Future contract benefits:                   
 Indexed annuity contracts embedded                   
  derivatives  (59)   -   -    152    -   93
Other liabilities:                   
 Credit default swaps  -   7   -    -    -   7
    Total, net$ 653 $ (339) $ (293)  $ 14  $ (91) $ (56)
                               
Benefit plans' assets$ - $ (22) $ (17)  $ -  $ - $ (39)

            For the Year Ended December 31, 2012
            Transfers Transfers   
            In to Out of   
            Level 3 Level 3 Total
Investments:        
 Fixed maturity AFS securities:        
  Corporate bonds$ 35 $ (691) $ (656)
  Foreign government bonds  -   (46)   (46)
  RMBS  -   (147)   (147)
  CMBS  5   (7)   (2)
  CDOs  6   (21)   (15)
  Hybrid and redeemable preferred securities  35   (40)   (5)
 Trading securities  2   (19)   (17)
    Total, net $ 83 $ (971) $ (888)

            For the Year Ended December 31, 2011
            Transfers Transfers   
            In to Out of   
            Level 3 Level 3 Total
Investments:        
 Fixed maturity AFS securities:        
  Corporate bonds$ 249 $ (83) $ 166
  Foreign government bonds  -   (17)   (17)
  CMBS  4   (1)   3
  Hybrid and redeemable preferred securities  18   (21)   (3)
 Equity AFS securities  2   (35)   (33)
 Trading securities  1   (5)   (4)
    Total, net $ 274 $ (162) $ 112

            For the Year Ended December 31, 2010
            Transfers Transfers   
            In to Out of   
            Level 3 Level 3 Total
Investments:        
 Fixed maturity AFS securities:        
  Corporate bonds$ 147 $ (197) $ (50)
  U.S. government bonds  3   -   3
  Foreign government bonds  17   -   17
  RMBS  -   (4)   (4)
  CMBS  3   (121)   (118)
  CLNs  -   (600)   (600)
 Trading securities  -   (1)   (1)
 VIEs' liabilities - derivative instruments  (225)   -   (225)
    Total, net $ (55) $ (923) $ (978)