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Schedule I Summary of Investments - Other Than Investments in Affiliates (Details) $ in Millions | Dec. 31, 2018 USD ($)
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SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | $ 46,802
Amount at which shown on Balance Sheet | 46,790
U.S. government and government agencies and authorities (guaranteed and sponsored) |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 4,446
Fair Value | 4,430
Amount at which shown on Balance Sheet | 4,430
States, municipalities and political subdivisions |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 9,972
Fair Value | 10,346
Amount at which shown on Balance Sheet | 10,346
Foreign government |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 866
Fair Value | 847
Amount at which shown on Balance Sheet | 847
Public utilities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 2,017
Fair Value | 1,991
Amount at which shown on Balance Sheet | 1,991
All other corporate bonds |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 11,679
Fair Value | 11,407
Amount at which shown on Balance Sheet | 11,407
All other mortgage-backed and asset-backed securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 6,623
Fair Value | 6,631
Amount at which shown on Balance Sheet | 6,631
Total fixed maturities, available-for-sale |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 35,603
Fair Value | 35,652
Amount at which shown on Balance Sheet | 35,652
Fixed maturities, at fair value using fair value option |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 21
Fair Value | 22
Amount at which shown on Balance Sheet | 22
Total fixed maturities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 35,624
Fair Value | 35,674
Amount at which shown on Balance Sheet | 35,674
Industrial, miscellaneous and all other |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 1,170
Fair Value | 1,170
Amount at which shown on Balance Sheet | 1,170
Non-redeemable preferred stocks |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 44
Fair Value | 44
Amount at which shown on Balance Sheet | 44
Equity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 1,214
Fair Value | 1,214
Amount at which shown on Balance Sheet | 1,214
Mortgage loans |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 3,704
Fair Value | 3,746
Amount at which shown on Balance Sheet | 3,704
Futures, options and miscellaneous |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 254
Fair Value | 192
Amount at which shown on Balance Sheet | 192
Short-term investments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 4,282
Fair Value | 4,283
Amount at which shown on Balance Sheet | 4,283
Investments in partnerships and trusts |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 1,723
Amount at which shown on Balance Sheet | $ 1,723

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