v3.8.0.1

Schedule I - Summary of Investments Other Than investments in Related Parties (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | $ 312,385 | $ 292,581
Fair Value | [1] | 346,780 | 321,419
Fixed maturities, held-to-maturity | [1] | 2,049 | 2,144
Fixed maturities, held to maturity, fair value |  | 2,430 | 2,524
Equity Security at Cost |  | 4,147 | 7,149
Equity securities, available-for-sale |  | 6,174 | 9,748
Fair Value | [1] | 22,097 | 21,840
Commercial mortgage and other loans | [1] | 56,045 | 52,779
Policy loans |  | 11,891 | 11,755
Short-term investments |  | 6,775 | 7,508
Other Long-term Investments | [1] | 12,308 | 11,283
Total Investment at Cost |  | 433,449 |
Total investment per Balance Sheet |  | 469,871 | 444,240
Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 312,385 | 292,581
Fair Value |  | 346,780 | 321,419
Fixed maturities, held-to-maturity |  | 2,049 | 2,144
Fixed maturities, held to maturity, fair value |  | 2,430 | 2,524
Fair Value |  | 20,209 | 19,850
Equity securities |  |  |
Schedule of Investments [Line Items] |  |  |
Equity Security at Cost |  | 4,147 | 7,149
Equity securities, available-for-sale |  | 6,174 | 9,748
Fair Value |  | 1,643 | 1,335
Available-for-sale | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 312,385 |
Fair Value |  | 346,780 |
Available-for-sale | Equity securities |  |  |
Schedule of Investments [Line Items] |  |  |
Equity Security at Cost |  | 4,147 |
Equity securities, available-for-sale |  | 6,174 |
Held-to-maturity | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Fixed maturities, held-to-maturity |  | 2,049 |
Fixed maturities, held to maturity, fair value |  | 2,430 |
U.S. Treasury securities and obligations of U.S. government authorities and agencies | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 22,837 | 21,505
Fair Value |  | 26,138 | 23,784
U.S. Treasury securities and obligations of U.S. government authorities and agencies | Available-for-sale | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 22,837 |
Fair Value |  | 26,138 |
Obligations of U.S. states and their political subdivisions | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 9,366 | 9,060
Fair Value |  | 10,471 | 9,692
Obligations of U.S. states and their political subdivisions | Available-for-sale | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 9,366 |
Fair Value |  | 10,471 |
Foreign governments | Available-for-sale | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 88,062 |
Fair Value |  | 103,419 |
Foreign governments | Held-to-maturity | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Fixed maturities, held-to-maturity |  | 865 |
Fixed maturities, held to maturity, fair value |  | 1,130 |
Asset-backed securities | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 11,965 | 11,759
Fair Value |  | 12,233 | 11,935
Fair Value |  | 1,392 | 1,349
Asset-backed securities | Available-for-sale | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 11,965 |
Fair Value |  | 12,233 |
Residential mortgage-backed securities | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 3,491 | 4,308
Fair Value |  | 3,645 | 4,532
Fixed maturities, held-to-maturity |  | 446 | 573
Fixed maturities, held to maturity, fair value |  | 478 | 616
Fair Value |  | 966 | 1,150
Residential mortgage-backed securities | Available-for-sale | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 3,491 |
Fair Value |  | 3,645 |
Residential mortgage-backed securities | Held-to-maturity | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Fixed maturities, held-to-maturity |  | 446 |
Fixed maturities, held to maturity, fair value |  | 478 |
Commercial Mortgage Backed Securities | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 13,134 | 12,589
Fair Value |  | 13,281 | 12,704
Fixed maturities, held-to-maturity |  | 0 | 0
Fixed maturities, held to maturity, fair value |  | 0 | 0
Fair Value |  | 2,311 | $ 2,052
Commercial Mortgage Backed Securities | Available-for-sale | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 13,134 |
Fair Value |  | 13,281 |
Commercial Mortgage Backed Securities | Held-to-maturity | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Fixed maturities, held-to-maturity |  | 0 |
Fixed maturities, held to maturity, fair value |  | 0 |
Public utilities | Available-for-sale | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 26,169 |
Fair Value |  | 28,723 |
Certificates of deposit | Available-for-sale | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 30 |
Fair Value |  | 31 |
All other corporate bonds | Available-for-sale | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 136,805 |
Fair Value |  | 148,250 |
All other corporate bonds | Held-to-maturity | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Fixed maturities, held-to-maturity |  | 738 |
Fixed maturities, held to maturity, fair value |  | 822 |
Redeemable preferred stock | Available-for-sale | Fixed Maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Amortized Cost |  | 526 |
Fair Value |  | 589 |
Public utilities | Available-for-sale | Equity securities |  |  |
Schedule of Investments [Line Items] |  |  |
Equity Security at Cost |  | 93 |
Equity securities, available-for-sale |  | 117 |
Banks, trust and insurance companies | Available-for-sale | Equity securities |  |  |
Schedule of Investments [Line Items] |  |  |
Equity Security at Cost |  | 929 |
Equity securities, available-for-sale |  | 1,428 |
Industrial, miscellaneous and other | Available-for-sale | Equity securities |  |  |
Schedule of Investments [Line Items] |  |  |
Equity Security at Cost |  | 3,109 |
Equity securities, available-for-sale |  | 4,612 |
Nonredeemable preferred stock | Available-for-sale | Equity securities |  |  |
Schedule of Investments [Line Items] |  |  |
Equity Security at Cost |  | 16 |
Equity securities, available-for-sale |  | 17 |
Other trading account assets |  |  |
Schedule of Investments [Line Items] |  |  |
Fair Value |  | 5,752 |
Commercial mortgage and agricultural properties loans and other collateralized loans |  |  |
Schedule of Investments [Line Items] |  |  |
Commercial mortgage and other loans |  | 55,387 |
Uncollateralized loans |  |  |
Schedule of Investments [Line Items] |  |  |
Commercial mortgage and other loans |  | $ 658 |
[1] | See Note 5 for details of balances associated with variable interest entities.

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