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Derivatives (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Sep. 30, 2012
Maturity 12 20 2012 [Member]
Dec. 31, 2011
Maturity 12 20 2012 [Member]
Sep. 30, 2012
Maturity 12 20 2016 [Member]
Dec. 31, 2011
Maturity 12 20 2016 [Member]
Sep. 30, 2012
Maturity 3 20 2017 [Member]
Dec. 31, 2011
Maturity 3 20 2017 [Member]
Sep. 30, 2012
BBB plus average credit rating [Member]
Maturity 12 20 2012 [Member]
Dec. 31, 2011
BBB plus average credit rating [Member]
Maturity 12 20 2012 [Member]
Dec. 31, 2011
BBB plus average credit rating [Member]
Maturity 12 20 2016 [Member]
Sep. 30, 2012
Bbb Minus Average Credit Rating [Member]
Maturity 12 20 2016 [Member]
Sep. 30, 2012
Bbb Minus Average Credit Rating [Member]
Maturity 3 20 2017 [Member]
Sep. 30, 2012
AA [Member]
Dec. 31, 2011
AA [Member]
Sep. 30, 2012
AA- [Member]
Dec. 31, 2011
AA- [Member]
Sep. 30, 2012
A plus [Member]
Dec. 31, 2011
A plus [Member]
Sep. 30, 2012
A [Member]
Dec. 31, 2011
A [Member]
Sep. 30, 2012
A- [Member]
Dec. 31, 2011
A- [Member]
Sep. 30, 2012
BBB [Member]
Dec. 31, 2011
BBB [Member]
Dec. 31, 2011
BBB [Member]
Maturity 3 20 2017 [Member]
Sep. 30, 2012
Unrealized Gain (Loss) on AFS Securities [Member]
Sep. 30, 2011
Unrealized Gain (Loss) on AFS Securities [Member]
Sep. 30, 2012
Unrealized Other Than Temporary Impairment on Available For Sale Securities [Member]
Dec. 31, 2011
Unrealized Other Than Temporary Impairment on Available For Sale Securities [Member]
Sep. 30, 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]
Sep. 30, 2012
Unrealized Gain (Loss) on Derivative Instruments [Member]
Sep. 30, 2011
Unrealized Gain (Loss) on Derivative Instruments [Member]
Sep. 30, 2012
Unrealized Gain (Loss) on Derivative Instruments [Member]
Net investment income [Member]
Sep. 30, 2011
Unrealized Gain (Loss) on Derivative Instruments [Member]
Net investment income [Member]
Sep. 30, 2012
Foreign Currency Translation Adjustment [Member]
Dec. 31, 2011
Foreign Currency Translation Adjustment [Member]
Sep. 30, 2011
Foreign Currency Translation Adjustment [Member]
Dec. 31, 2010
Foreign Currency Translation Adjustment [Member]
Sep. 30, 2012
Funded Status of Employee Benefit Plans [Member]
Dec. 31, 2011
Funded Status of Employee Benefit Plans [Member]
Sep. 30, 2011
Funded Status of Employee Benefit Plans [Member]
Dec. 31, 2010
Funded Status of Employee Benefit Plans [Member]
Sep. 30, 2012
Cash flow hedges [Member]
Sep. 30, 2011
Cash flow hedges [Member]
Sep. 30, 2012
Cash flow hedges [Member]
Sep. 30, 2011
Cash flow hedges [Member]
Sep. 30, 2012
Cash flow hedges [Member]
Derivative investments [Member]
Dec. 31, 2011
Cash flow hedges [Member]
Derivative investments [Member]
Sep. 30, 2012
Fair value hedges [Member]
Derivative investments [Member]
Dec. 31, 2011
Fair value hedges [Member]
Derivative investments [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Cash flow hedges [Member]
Net investment income [Member]
Sep. 30, 2011
Interest Rate Contract [Member]
Cash flow hedges [Member]
Net investment income [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Cash flow hedges [Member]
Net investment income [Member]
Sep. 30, 2011
Interest Rate Contract [Member]
Cash flow hedges [Member]
Net investment income [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Cash flow hedges [Member]
Derivative investments [Member]
Dec. 31, 2011
Interest Rate Contract [Member]
Cash flow hedges [Member]
Derivative investments [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Sep. 30, 2011
Interest Rate Contract [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Interest Expense [Member]
Sep. 30, 2011
Interest Rate Contract [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Interest Expense [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Net investment income [Member]
Sep. 30, 2011
Interest Rate Contract [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Net investment income [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Fair value hedges [Member]
Interest Expense [Member]
Sep. 30, 2011
Interest Rate Contract [Member]
Fair value hedges [Member]
Interest Expense [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Fair value hedges [Member]
Interest Expense [Member]
Sep. 30, 2011
Interest Rate Contract [Member]
Fair value hedges [Member]
Interest Expense [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Fair value hedges [Member]
Derivative investments [Member]
Dec. 31, 2011
Interest Rate Contract [Member]
Fair value hedges [Member]
Derivative investments [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Fair value hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Sep. 30, 2011
Interest Rate Contract [Member]
Fair value hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Fair value hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Interest Expense [Member]
Sep. 30, 2011
Interest Rate Contract [Member]
Fair value hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Interest Expense [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Sep. 30, 2011
Interest Rate Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Sep. 30, 2011
Interest Rate Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
Interest Rate Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
Interest Rate Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
Interest Rate Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2011
Interest Rate Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Sep. 30, 2012
Foreign Exchange Contract [Member]
Sep. 30, 2012
Foreign Exchange Contract [Member]
Cash flow hedges [Member]
Net investment income [Member]
Sep. 30, 2011
Foreign Exchange Contract [Member]
Cash flow hedges [Member]
Net investment income [Member]
Sep. 30, 2012
Foreign Exchange Contract [Member]
Cash flow hedges [Member]
Net investment income [Member]
Sep. 30, 2011
Foreign Exchange Contract [Member]
Cash flow hedges [Member]
Net investment income [Member]
Sep. 30, 2012
Foreign Exchange Contract [Member]
Cash flow hedges [Member]
Derivative investments [Member]
Dec. 31, 2011
Foreign Exchange Contract [Member]
Cash flow hedges [Member]
Derivative investments [Member]
Sep. 30, 2012
Foreign Exchange Contract [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Sep. 30, 2011
Foreign Exchange Contract [Member]
Cash flow hedges [Member]
Unrealized Gain (Loss) on Derivative Instruments [Member]
Sep. 30, 2012
Foreign Exchange Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
Foreign Exchange Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
Foreign Exchange Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
Foreign Exchange Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
Foreign Exchange Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2011
Foreign Exchange Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Sep. 30, 2012
Equity Market Contract [Member]
Sep. 30, 2012
Equity Market Contract [Member]
Fair value hedges [Member]
Derivative investments [Member]
Dec. 31, 2011
Equity Market Contract [Member]
Fair value hedges [Member]
Derivative investments [Member]
Sep. 30, 2012
Equity Market Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
Equity Market Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
Equity Market Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
Equity Market Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
Equity Market Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Underwriting, acquisition, insurance and other expenses [Member]
Sep. 30, 2011
Equity Market Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Underwriting, acquisition, insurance and other expenses [Member]
Sep. 30, 2012
Equity Market Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Underwriting, acquisition, insurance and other expenses [Member]
Sep. 30, 2011
Equity Market Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Underwriting, acquisition, insurance and other expenses [Member]
Sep. 30, 2012
Equity Market Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2011
Equity Market Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Sep. 30, 2012
Credit Risk Contract [Member]
Sep. 30, 2012
Credit Risk Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Sep. 30, 2011
Credit Risk Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Sep. 30, 2012
Credit Risk Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Sep. 30, 2011
Credit Risk Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Sep. 30, 2012
Credit Risk Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
Credit Risk Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
Credit Risk Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
Credit Risk Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
Credit Risk Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Dec. 31, 2011
Credit Risk Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Derivative investments [Member]
Sep. 30, 2012
Credit Risk Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Other Liabilities [Member]
Dec. 31, 2011
Credit Risk Contract [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Other Liabilities [Member]
Sep. 30, 2012
Indexed Annuity Contracts Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
Indexed Annuity Contracts Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
Indexed Annuity Contracts Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
Indexed Annuity Contracts Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
Indexed Annuity Contracts Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Future contract benefits [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]
Sep. 30, 2012
GLB Embedded Derivative Reserves [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
GLB Embedded Derivative Reserves [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
GLB Embedded Derivative Reserves [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
GLB Embedded Derivative Reserves [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
GLB Embedded Derivative Reserves [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]
Future contract benefits [Member]
Sep. 30, 2012
Available For Sale Securities Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Sep. 30, 2011
Available For Sale Securities Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Sep. 30, 2012
Available For Sale Securities Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Sep. 30, 2011
Available For Sale Securities Embedded Derivatives [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Net investment income [Member]
Sep. 30, 2012
Reinsurance Related [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
Reinsurance Related [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
Reinsurance Related [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2011
Reinsurance Related [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Realized gain (loss) [Member]
Sep. 30, 2012
Reinsurance Related [Member]
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Reinsurance Related Embedded Derivatives [Member]
Dec. 31, 2011
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 $ 61,003   $ 61,003   $ 51,360                                                                                             $ 3,756 $ 2,852 $ 884 $ 1,675           $ 3,336 $ 2,512                     $ 875 $ 1,675                         $ 36,714 $ 30,232           $ 420 $ 340             $ 138 $ 4   $ 9 $ 0                 $ 19,276 $ 16,401                   $ 47 $ 48 $ 188 $ 148         $ 0 $ 0         $ 0 $ 0                 $ 0 $ 0
Asset Carrying or Fair Value 3,072   3,072   3,151                                                                                             235 168 307 319           210 130                     307 319                         750 568           25 38             0 0   0 0                 1,780 2,096                   0 0 0 0         0 0         0 0                 0 0
Liability Carrying or Fair Value Loss 2,378   2,378   2,800                                                                                             0 0 0 0           0 0                     0 0                         0 0           0 0             0 0   0 0                 0 0                   3 0 16 16         733 399         1,411 2,217                 215 168
Maturity of the notional amounts of derivative financial instruments                                                                                                                                                                                                                                                                                                              
Remaining Life Less Than 1 Year 13,205   13,205                                                                                                         3,110                                                                 138                             9,917                         40                                                                    
Remaining Life - 1 - 5 Years 24,440   24,440                                                                                                         20,203                                                                 179                             3,863                         195                                                                    
Remaining Life - 6 - 10 Years 11,975   11,975                                                                                                         6,307                                                                 191                             5,477                         0                                                                    
Remaining Life - 11 - 30 Years 10,167   10,167                                                                                                         10,092                                                                 50                             25                         0                                                                    
Remaining Life Over - 30 Years 1,216   1,216                                                                                                         1,213                                                                 0                             3                         0                                                                    
Remaining Life - Total Years 61,003   61,003                                                                                                         40,925                                                                 558                             19,285                         235                                                                    
Change in our unrealized gain on derivative instruments in accumulated OCI                                                                                                                                                                                                                                                                                                              
Balance as of beginning-of-year                                                           2,947 1,072 (98) (110) (110) (129) 119 (15)     (3) 1 3 1 (279) (278) (183) (181)                                                                                                                                                                                                                
Cumulative effect from adoption of new accounting standard                                                                       0 4                                                                                                                                                                                                                                    
Unrealized holding gains (losses) arising during the period                                                                                                                             67 178                     3 3                                       (3) 7                                                                                                            
Change in foreign currency exchange rate adjustment                                                           9 2         (7) (1)                                                                                                                                                                                                                                    
Change in DAC, VOBA, DSI and DFEL                                                                       9 (1)                                                                                                                                                                                                                                    
Income tax benefit (expense)                                                                       (30) (65)                                                                                                                                                                                                                                    
Less: Reclassification adjustment for gains (losses) included in net income (loss)                                                                           3 (3)                                                   0 3 (17) (6)                 3 3                                                                                                                                                  
Less: Associated amortization of DAC, VOBA, DSI and DFEL                                                                       2 0                                                                                                                                                                                                                                    
Less: Income tax benefit (expense)                                                                       3 1                                                                                                                                                                                                                                    
Balance as of end-of-period                                                           4,353 2,843 (98) (110) (110) (129) 177 112     (3) 1 3 1 (279) (278) (183) (181)                                                                                                                                                                                                                
Transfers from derivative instruments to bonds through basis adjustment                                                                       13 0                                                                                                                                                                                                                                    
Gains (losses)                                                                                                                                                                                                                                                                                                              
Gains (losses) (18) (184) (162) (266)                                                                                       (4) 0 (13) (4)           (6) (2) (17) (7)                 5 13 28 38             (4) (25) (23) (41) (2) 982 206 1,008       2 2 4 3         (4) (5) (8) (11)           (343) 694 (773) 560 (136) 154 (246) 120       0 (1) (1) (1) (7) (8) (2) (6)         (63) 135 (143) 81     570 (2,065) 861 (1,935)     0 0 0 1 (30) (58) (48) (76)    
Gains (losses) on derivative instruments designated as cash flow hedges                                                                                                                                                                                                                                                                                                              
Gain (loss) recognized as a component of other comprehensive income with the offset to net investment income (5) 0 (15) (4)                                                                                                                                                                                                                                                                                                      
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months     22                                                                                                                                                                                                                                                                                                        
Information related to fair value hedges                                                                                                                                                                                                                                                                                                              
Gain (loss) recognized as a component of OCI with the offset to interest expense 1 1 3 3                                                                                                                                                                                                                                                                                                      
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 11   11   9 4 4 3 3 4 2                                                                                                                                                                                                                                                                                        
Fair Value of open credit default swap liabilities (17)   (17)   (16) 0 0 (6) (12) (11) (4)                                                                                                                                                                                                                                                                                        
Maximum potential payout of open credit default swap liabilities 189   189   148 40 40 68 68 81 40                                                                                                                                                                                                                                                                                        
Credit risk related contingent features collateral                                                                                                                                                                                                                                                                                                              
Maximum potential payout 189   189   148 40 40 68 68 81 40                                                                                                                                                                                                                                                                                        
Less: Counterparty thresholds 0   0   0                                                                                                                                                                                                                                                                                                    
Maximum collateral potentially required to post 189 148 189 148                                                                                                                                                                                                                                                                                                      
Collateral requirement if netting agreements not in place 16   16                                                                                                                                                                                                                                                                                                        
Nonperformance risk adjustment 4   4                                                                                                                                                                                                                                                                                                        
Exposure associated with collateralization events 50   50                                                                                                                                                                                                                                                                                                        
Collateral support agreements                                                                                                                                                                                                                                                                                                              
Collateral Posted by Counterparty (Held by Entity) 3,086   3,086   3,170                       46 35 76 219 668 848 879 1,681 1,415 387 2 0                                                                                                                                                                                                                                                      
Collateral Posted by LNC (Held by Counterparty) $ (83)   $ (83)   $ (120)                       $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ (83) $ (120) $ 0 $ 0 $ 0 $ 0