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Fair Value Measurements (Details) - USD ($) $ in Millions | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | $ 33,114 | $ 30,734
Trading fixed maturities |  | 269 | 266
Assets of managed investment entities (“MIE”) |  | 3,613 | 3,108
Variable annuity assets (separate accounts) | [1] | 595 | 662
Total assets accounted for at fair value |  | 39,552 | 36,788
Liabilities: |  |  |
Liabilities of managed investment entities |  | 3,287 | 2,819
Total liabilities accounted for at fair value |  | 4,487 | 3,992
Annuity benefits accumulated [Member] |  |  |
Liabilities: |  |  |
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities |  | 1,198 | 1,160
Derivatives in long-term debt [Member] |  |  |
Liabilities: |  |  |
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities |  | (7) |
Other liabilities — derivatives [Member] |  |  |
Liabilities: |  |  |
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities |  | 9 | 13
U.S. Government and government agencies [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 335 | 353
States, municipalities and political subdivisions [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 7,166 | 6,747
Foreign government [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 166 | 194
Residential Mortgage Backed Securities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 3,879 | 4,442
Commercial Mortgage Backed Securities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 2,297 | 2,451
Asset-backed Securities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 4,701 | 3,887
All other corporate [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 14,570 | 12,660
Fixed maturities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 33,114 | 30,734
Trading fixed maturities |  | 269 | 266
Equity securities [Member] |  |  |
Assets: |  |  |
Equity securities |  | 1,831 | 1,696
Other investments [Member] |  |  |
Assets: |  |  |
Derivatives included in other investments and other assets |  | 122 | 322
Other assets [Member] |  |  |
Assets: |  |  |
Derivatives included in other investments and other assets |  | 8 |
Level 1 [Member] |  |  |
Assets: |  |  |
Assets of managed investment entities (“MIE”) |  | 155 | 174
Variable annuity assets (separate accounts) | [1] | 0 | 0
Total assets accounted for at fair value |  | 1,804 | 1,692
Liabilities: |  |  |
Liabilities of managed investment entities |  | 141 | 118
Total liabilities accounted for at fair value |  | 141 | 118
Level 1 [Member] | Annuity benefits accumulated [Member] |  |  |
Liabilities: |  |  |
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities |  | 0 | 0
Level 1 [Member] | Derivatives in long-term debt [Member] |  |  |
Liabilities: |  |  |
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities |  | 0 |
Level 1 [Member] | Other liabilities — derivatives [Member] |  |  |
Liabilities: |  |  |
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities |  | 0 | 0
Level 1 [Member] | U.S. Government and government agencies [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 115 | 164
Level 1 [Member] | States, municipalities and political subdivisions [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 0 | 0
Level 1 [Member] | Foreign government [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 0 | 0
Level 1 [Member] | Residential Mortgage Backed Securities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 0 | 0
Level 1 [Member] | Commercial Mortgage Backed Securities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 0 | 0
Level 1 [Member] | Asset-backed Securities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 0 | 0
Level 1 [Member] | All other corporate [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 48 | 36
Level 1 [Member] | Fixed maturities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 163 | 200
Trading fixed maturities |  | 13 | 12
Level 1 [Member] | Equity securities [Member] |  |  |
Assets: |  |  |
Equity securities |  | 1,473 | 1,306
Level 1 [Member] | Other investments [Member] |  |  |
Assets: |  |  |
Derivatives included in other investments and other assets |  | 0 | 0
Level 1 [Member] | Other assets [Member] |  |  |
Assets: |  |  |
Derivatives included in other investments and other assets |  | 0 |
Level 2 [Member] |  |  |
Assets: |  |  |
Assets of managed investment entities (“MIE”) |  | 3,432 | 2,903
Variable annuity assets (separate accounts) | [1] | 595 | 662
Total assets accounted for at fair value |  | 36,057 | 33,741
Liabilities: |  |  |
Liabilities of managed investment entities |  | 3,123 | 0
Total liabilities accounted for at fair value |  | 3,125 | 13
Level 2 [Member] | Annuity benefits accumulated [Member] |  |  |
Liabilities: |  |  |
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities |  | 0 | 0
Level 2 [Member] | Derivatives in long-term debt [Member] |  |  |
Liabilities: |  |  |
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities |  | (7) |
Level 2 [Member] | Other liabilities — derivatives [Member] |  |  |
Liabilities: |  |  |
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities |  | 9 | 13
Level 2 [Member] | U.S. Government and government agencies [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 205 | 174
Level 2 [Member] | States, municipalities and political subdivisions [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 7,073 | 6,647
Level 2 [Member] | Foreign government [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 166 | 194
Level 2 [Member] | Residential Mortgage Backed Securities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 3,585 | 4,142
Level 2 [Member] | Commercial Mortgage Backed Securities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 2,252 | 2,407
Level 2 [Member] | Asset-backed Securities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 4,252 | 3,661
Level 2 [Member] | All other corporate [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 13,876 | 12,078
Level 2 [Member] | Fixed maturities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 31,409 | 29,303
Trading fixed maturities |  | 256 | 254
Level 2 [Member] | Equity securities [Member] |  |  |
Assets: |  |  |
Equity securities |  | 235 | 297
Level 2 [Member] | Other investments [Member] |  |  |
Assets: |  |  |
Derivatives included in other investments and other assets |  | 122 | 322
Level 2 [Member] | Other assets [Member] |  |  |
Assets: |  |  |
Derivatives included in other investments and other assets |  | 8 |
Level 3 [Member] |  |  |
Assets: |  |  |
Assets of managed investment entities (“MIE”) |  | 26 | 31
Variable annuity assets (separate accounts) | [1] | 0 | 0
Total assets accounted for at fair value |  | 1,691 | 1,355
Liabilities: |  |  |
Liabilities of managed investment entities |  | 23 | 2,701
Total liabilities accounted for at fair value |  | 1,221 | 3,861
Level 3 [Member] | Annuity benefits accumulated [Member] |  |  |
Liabilities: |  |  |
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities |  | 1,198 | 1,160
Level 3 [Member] | Derivatives in long-term debt [Member] |  |  |
Liabilities: |  |  |
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities |  | 0 |
Level 3 [Member] | Other liabilities — derivatives [Member] |  |  |
Liabilities: |  |  |
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities |  | 0 | 0
Level 3 [Member] | U.S. Government and government agencies [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 15 | 15
Level 3 [Member] | States, municipalities and political subdivisions [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 93 | 100
Level 3 [Member] | Foreign government [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 0 | 0
Level 3 [Member] | Residential Mortgage Backed Securities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 294 | 300
Level 3 [Member] | Commercial Mortgage Backed Securities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 45 | 44
Level 3 [Member] | Asset-backed Securities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 449 | 226
Level 3 [Member] | All other corporate [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 646 | 546
Level 3 [Member] | Fixed maturities [Member] |  |  |
Assets: |  |  |
Available for sale (AFS) fixed maturities |  | 1,542 | 1,231
Trading fixed maturities |  | 0 | 0
Level 3 [Member] | Equity securities [Member] |  |  |
Assets: |  |  |
Equity securities |  | 123 | 93
Level 3 [Member] | Other investments [Member] |  |  |
Assets: |  |  |
Derivatives included in other investments and other assets |  | 0 | $ 0
Level 3 [Member] | Other assets [Member] |  |  |
Assets: |  |  |
Derivatives included in other investments and other assets |  | $ 0 |
[1] | Variable annuity liabilities equal the fair value of variable annuity assets.

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