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Schedule I (Details) $ in Millions | Dec. 31, 2024 USD ($)
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SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | $ 96,019
Fair value | 93,547
Amount at which shown in the Balance sheet | 93,663
U.S. government and government sponsored entities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 3,346
Fair value | 3,267
Amount at which shown in the Balance sheet | 3,267
Obligations of states, municipalities and political subdivisions |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 3,273
Fair value | 3,193
Amount at which shown in the Balance sheet | 3,193
Non-U.S. governments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 8,668
Fair value | 8,131
Amount at which shown in the Balance sheet | 8,131
Public utilities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 3,253
Fair value | 3,053
Amount at which shown in the Balance sheet | 3,053
All other corporate debt securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 30,059
Fair value | 29,055
Amount at which shown in the Balance sheet | 29,055
Mortgage-backed, asset-backed and collateralized |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 18,341
Fair value | 18,052
Amount at which shown in the Balance sheet | 18,052
Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 66,940
Fair value | 64,751
Amount at which shown in the Balance sheet | 64,751
Public utilities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 1
Fair value | 1
Amount at which shown in the Balance sheet | 1
Banks, trust and insurance companies |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 489
Fair value | 489
Amount at which shown in the Balance sheet | 489
Industrial, miscellaneous and all other |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 36
Fair value | 36
Amount at which shown in the Balance sheet | 36
Common Stock, Par Value $2.50 Per Share |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 526
Fair value | 526
Amount at which shown in the Balance sheet | 526
Mutual funds |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 178
Fair value | 178
Amount at which shown in the Balance sheet | 178
Equity Securities And Mutual Funds |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 704
Fair value | 704
Amount at which shown in the Balance sheet | 704
Mortgage and other loans receivable, net of allowance |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 3,868
Fair value | 3,752
Amount at which shown in the Balance sheet | 3,868
Other invested assets |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 9,995
Fair value | 9,828
Amount at which shown in the Balance sheet | 9,828
Short-term investments, at cost (approximates fair value) |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 14,462
Fair value | 14,462
Amount at which shown in the Balance sheet | 14,462
Derivative assets |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 50
Fair value | 50
Amount at which shown in the Balance sheet | $ 50

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