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Derivative Instruments (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2011
Maturity 12 20 2012 [Member]
Dec. 31, 2010
Maturity 12 20 2012 [Member]
Dec. 31, 2011
Maturity 12 20 2016 [Member]
Dec. 31, 2010
Maturity 12 20 2016 [Member]
Dec. 31, 2011
Maturity 3 20 2017 [Member]
Dec. 31, 2010
Maturity 3 20 2017 [Member]
Dec. 31, 2011
AAA [Member]
Dec. 31, 2010
AAA [Member]
Dec. 31, 2011
AA [Member]
Dec. 31, 2010
AA [Member]
Dec. 31, 2011
AA- [Member]
Dec. 31, 2010
AA- [Member]
Dec. 31, 2011
A plus [Member]
Dec. 31, 2010
A plus [Member]
Dec. 31, 2011
A [Member]
Dec. 31, 2010
A [Member]
Dec. 31, 2011
A minus [Member]
Dec. 31, 2010
A minus [Member]
Dec. 31, 2011
Unrealized Gain (Loss) on AFS Securities [Member]
Dec. 31, 2010
Unrealized Gain (Loss) on AFS Securities [Member]
Dec. 31, 2009
Unrealized Gain (Loss) on AFS Securities [Member]
Dec. 31, 2011
Unrealized Other Than Temporary Impairment on Available For Sale Securities [Member]
Dec. 31, 2010
Unrealized Other Than Temporary Impairment on Available For Sale Securities [Member]
Dec. 31, 2009
Unrealized Other Than Temporary Impairment on Available For Sale Securities [Member]
Dec. 31, 2008
Unrealized Other Than Temporary Impairment on Available For Sale Securities [Member]
Dec. 31, 2011
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2010
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2009
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2011
Foreign Currency Translation Adjustment [Member]
Dec. 31, 2010
Foreign Currency Translation Adjustment [Member]
Dec. 31, 2009
Foreign Currency Translation Adjustment [Member]
Dec. 31, 2011
Funded Status of Employee Benefit Plans [Member]
Dec. 31, 2010
Funded Status of Employee Benefit Plans [Member]
Dec. 31, 2009
Funded Status of Employee Benefit Plans [Member]
Dec. 31, 2008
Funded Status of Employee Benefit Plans [Member]
Dec. 31, 2011
Cash flow hedges [Member]
Dec. 31, 2010
Cash flow hedges [Member]
Dec. 31, 2009
Cash flow hedges [Member]
Dec. 31, 2011
Fair value hedges [Member]
Dec. 31, 2010
Fair value hedges [Member]
Dec. 31, 2009
Fair value hedges [Member]
Dec. 31, 2011
Net investment in foreign subsidiary [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2010
Net investment in foreign subsidiary [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2009
Net investment in foreign subsidiary [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Cash flow hedges [Member]
Net investment income [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Cash flow hedges [Member]
Net investment income [Member]
Dec. 31, 2009
Interest rate contracts [Member]
Cash flow hedges [Member]
Net investment income [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Cash flow hedges [Member]
Derivative investments [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Cash flow hedges [Member]
Derivative investments [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2009
Interest rate contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Interest expense [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Interest expense [Member]
Dec. 31, 2009
Interest rate contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Interest expense [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Net investment income [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Net investment income [Member]
Dec. 31, 2009
Interest rate contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Net investment income [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Fair value hedges [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Fair value hedges [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Fair value hedges [Member]
Interest expense [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Fair value hedges [Member]
Interest expense [Member]
Dec. 31, 2009
Interest rate contracts [Member]
Fair value hedges [Member]
Interest expense [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Fair value hedges [Member]
Derivative investments [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Fair value hedges [Member]
Derivative investments [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Fair value hedges [Member]
Long-term debt [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Fair value hedges [Member]
Long-term debt [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Fair value hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Fair value hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2009
Interest rate contracts [Member]
Fair value hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Fair value hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Interest expense [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Fair value hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Interest expense [Member]
Dec. 31, 2009
Interest rate contracts [Member]
Fair value hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Interest expense [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Dec. 31, 2009
Interest rate contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2009
Interest rate contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2011
Interest rate contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2010
Interest rate contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2011
Foreign exchange contracts [Member]
Dec. 31, 2011
Foreign exchange contracts [Member]
Cash flow hedges [Member]
Net investment income [Member]
Dec. 31, 2010
Foreign exchange contracts [Member]
Cash flow hedges [Member]
Net investment income [Member]
Dec. 31, 2009
Foreign exchange contracts [Member]
Cash flow hedges [Member]
Net investment income [Member]
Dec. 31, 2011
Foreign exchange contracts [Member]
Cash flow hedges [Member]
Derivative investments [Member]
Dec. 31, 2010
Foreign exchange contracts [Member]
Cash flow hedges [Member]
Derivative investments [Member]
Dec. 31, 2011
Foreign exchange contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2010
Foreign exchange contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2009
Foreign exchange contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2011
Foreign exchange contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Net investment income [Member]
Dec. 31, 2010
Foreign exchange contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Net investment income [Member]
Dec. 31, 2009
Foreign exchange contracts [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Net investment income [Member]
Dec. 31, 2011
Foreign exchange contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Dec. 31, 2010
Foreign exchange contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Dec. 31, 2009
Foreign exchange contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Dec. 31, 2011
Foreign exchange contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2010
Foreign exchange contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2009
Foreign exchange contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2011
Foreign exchange contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2010
Foreign exchange contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2011
Equity market contracts
Dec. 31, 2011
Equity market contracts
Fair value hedges [Member]
Realized gain (loss) [Member]
Dec. 31, 2010
Equity market contracts
Fair value hedges [Member]
Realized gain (loss) [Member]
Dec. 31, 2009
Equity market contracts
Fair value hedges [Member]
Realized gain (loss) [Member]
Dec. 31, 2011
Equity market contracts
Fair value hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2010
Equity market contracts
Fair value hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2009
Equity market contracts
Fair value hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2011
Equity market contracts
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2010
Equity market contracts
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2009
Equity market contracts
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2011
Equity market contracts
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Underwriting, acquisition, insurance and other expenses [Member]
Dec. 31, 2010
Equity market contracts
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Underwriting, acquisition, insurance and other expenses [Member]
Dec. 31, 2009
Equity market contracts
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Underwriting, acquisition, insurance and other expenses [Member]
Dec. 31, 2011
Equity market contracts
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2010
Equity market contracts
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2011
Credit Risk Contracts [Member]
Dec. 31, 2011
Credit Risk Contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Dec. 31, 2010
Credit Risk Contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Dec. 31, 2009
Credit Risk Contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Dec. 31, 2011
Credit Risk Contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2010
Credit Risk Contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2009
Credit Risk Contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2011
Credit Risk Contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2010
Credit Risk Contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2011
Credit Risk Contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Other liabilities [Member]
Dec. 31, 2010
Credit Risk Contracts [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Other liabilities [Member]
Dec. 31, 2011
Deferred Compensation Plans [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Underwriting, acquisition, insurance and other expenses [Member]
Dec. 31, 2010
Deferred Compensation Plans [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Underwriting, acquisition, insurance and other expenses [Member]
Dec. 31, 2009
Deferred Compensation Plans [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Underwriting, acquisition, insurance and other expenses [Member]
Dec. 31, 2011
Deferred Compensation Plans [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Other liabilities [Member]
Dec. 31, 2010
Deferred Compensation Plans [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Other liabilities [Member]
Dec. 31, 2011
Indexed Annuity Contracts Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2010
Indexed Annuity Contracts Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2009
Indexed Annuity Contracts Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2011
Indexed Annuity Contracts Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Future contract benefits [Member]
Dec. 31, 2010
Indexed Annuity Contracts Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Future contract benefits [Member]
Dec. 31, 2011
GLB Embedded Derivative Reserves [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2010
GLB Embedded Derivative Reserves [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2009
GLB Embedded Derivative Reserves [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2011
GLB Embedded Derivative Reserves [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Future contract benefits [Member]
Dec. 31, 2010
GLB Embedded Derivative Reserves [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Future contract benefits [Member]
Dec. 31, 2011
AFS securities embedded derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Dec. 31, 2010
AFS securities embedded derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Dec. 31, 2009
AFS securities embedded derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Dec. 31, 2011
AFS securities embedded derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2010
AFS securities embedded derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2011
AFS securities embedded derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2010
AFS securities embedded derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2009
AFS securities embedded derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Dec. 31, 2011
Reinsurance related [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2010
Reinsurance related [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2009
Reinsurance related [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Dec. 31, 2011
Reinsurance related [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Reinsurance related embedded derivatives [Member]
Dec. 31, 2010
Reinsurance related [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Reinsurance related embedded derivatives [Member]
Outstanding derivative instruments with off-balance-sheet risks                                                                                                                                                                                                                                                                                                                              
Notional Amounts $ 51,360 $ 34,438                                                                         $ 2,852 $ 2,416                       $ 2,512 $ 2,076                   $ 1,675 $ 1,675                                       $ 30,232 $ 18,406         $ 340 $ 340                         $ 4 $ 219                           $ 16,401 $ 11,577               $ 48 $ 0 $ 148 $ 145       $ 0 $ 0       $ 0 $ 0       $ 0 $ 0       $ 0 $ 0             $ 0 $ 0
Asset Carrying or Fair Value 3,151 1,076                                                                         168 (10)                       130 (40)                             319 55                             568 (426)         38 30                         0 0                           2,096 1,442               0 0 0 0       0 0       0 0       0 0       0 15             0 0
Liability Carrying or Fair Value 3,473 1,441                                                                         0 0                       0 0                                 319 55                         0 0         0 0                         0 0                           0 0               0 0 16 16       354 363       399 497       2,217 408       0 0             168 102
Maturity of the notional amounts of derivative financial instruments                                                                                                                                                                                                                                                                                                                              
Remaining Life Less Than 1 Year 10,836                                                                                             2,154                                                                           4                                       8,638                             40                                                                            
Remaining Life - 1 - 5 Years 14,778                                                                                             11,353                                                                           154                                       3,155                             116                                                                            
Remaining Life - 6 - 10 Years 16,083                                                                                             11,349                                                                           105                                       4,589                             40                                                                            
Remaining Life - 11 - 30 Years 9,654                                                                                             9,556                                                                           81                                       17                             0                                                                            
Remaining Life Over - 30 Years 9                                                                                             7                                                                           0                                       2                             0                                                                            
Remaining Life - Total Years 51,360                                                                                             34,419                                                                           344                                       16,401                             196                                                                            
Change in our unrealized gain on derivative instruments in accumulated OCI                                                                                                                                                                                                                                                                                                                              
Balance as of beginning-of-year                                           1,072 49 (2,654) (107) (129) (115) 0 (15) 11 127 1 3 6 (278) (181) (210) (282)                                                                                                                                                                                                                                                  
Unrealized holding gains (losses) arising during the year                                                                                         0 0 (74)             178 (47) 30                               4 4 4                                   3 14 (52)                               0 0 (28)                                                                               0 2 0          
Change in foreign currency exchange rate adjustment                                           (5) (6) 26         7 4 0 0 (3) (2)                                                                                                                                                                                                                                                          
Change in DAC, VOBA, DSI and DFEL                                                         (1) (4) 22                                                                                                                                                                                                                                                                
Income tax benefit (expense)                                                         (66) 9 (13)                                                                                                                                                                                                                                                                
Less: Reclassification adjustment for gains (losses) included in net income (loss)                                                                                                                 (1) 4 0 (15) 4 4                         4 4 4                                   2 2 0                                                                                                                            
Less: Associated amortization of DAC, VOBA, DSI and DFEL                                                         0 (1) 0                                                                                                                                                                                                                                                                
Less: Income tax benefit (expense)                                                         4 (5) (3)                                                                                                                                                                                                                                                                
Balance as of end-of-year                                           2,716 1,072 49 (107) (129) (115) 0 116 (15) 11 1 1 3 (278) (181) (210) (282)                                                                                                                                                                                                                                                  
Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Abstract]                                                                                                                                                                                                                                                                                                                              
Gains (losses) (426) (140) (988)                                                                       (13) 5 4 50 57 18         (15) 3 3                           50 42 17                     (44) 5 0 1,144 175 (1,553)       2 2 1                 0 43 (98) (12) (13) (7)       0 15 1       316 (386) (1,379) 21 (118) 35       0 1 1 (7) 7 (37)         (11) (34) (63)     5 (81) (75)     (1,809) 268 2,228     0 2 0           (66) (71) (62)    
Gains (losses) on derivative instruments designated as cash flow hedges                                                                                                                                                                                                                                                                                                                              
Ineffective portion recognized in realized gain (loss) 0 0 (1)                                                                                                                                                                                                                                                                                                                        
Gain (loss) recognized as a component of other comprehensive income with the offset to net investment income (13) 6 4                                                                                                                                                                                                                                                                                                                        
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months 20                                                                                                                                                                                                                                                                                                                            
Information related to fair value hedges                                                                                                                                                                                                                                                                                                                              
Ineffective portion recognized in realized gain (loss) 0 1 1                                                                                                                                                                                                                                                                                                                        
Gain (loss) recognized as a component of OCI with the offset to interest expense 4 4 4                                                                                                                                                                                                                                                                                                                        
Open credit default swap liabilities                                                                                                                                                                                                                                                                                                                              
Credit rating of underlying obligation       BBB+ BBB+ BBB+ BBB BBB BBB-                                                                                                                                                                                                                                                                                                            
Maturity date of open credit default swap liabilities       Dec. 20, 2012 Dec. 20, 2012 Dec. 20, 2016 Dec. 20, 2016 Mar. 20, 2017 Mar. 20, 2017                                                                                                                                                                                                                                                                                                            
Credit default swaps, number of instruments 9 9   4 4 3 3 2 2                                                                                                                                                                                                                                                                                                            
Fair Value of open credit default swap liabilities (16) (16)   0 0 (12) (12) (4) (4)                                                                                                                                                                                                                                                                                                            
Maximum potential payout of open credit default swap liabilities 148 145   40 40 68 65 40 40                                                                                                                                                                                                                                                                                                            
Credit risk related contingent features collateral                                                                                                                                                                                                                                                                                                                              
Maximum potential payout 148 145   40 40 68 65 40 40                                                                                                                                                                                                                                                                                                            
Less: Counterparty thresholds 0 10                                                                                                                                                                                                                                                                                                                          
Maximum collateral potentially required to post 148 135                                                                                                                                                                                                                                                                                                                          
Collateral requirement if netting agreements not in place 16                                                                                                                                                                                                                                                                                                                            
Nonperformance risk adjustment 16                                                                                                                                                                                                                                                                                                                            
Exposure associated with collateralization events 81                                                                                                                                                                                                                                                                                                                            
Collateral support agreements                                                                                                                                                                                                                                                                                                                              
Collateral Posted by Counterparty (Held by LNC) 3,170 1,149               0 1 35 99 219 65 848 548 1,681 436 387 0                                                                                                                                                                                                                                                                                    
Collateral Posted by LNC (Held by Counterparty) $ (120) $ (299)               $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ (76) $ (120) $ (223) $ 0 $ 0