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Investments - Distribution of Residential Mortgage Loans by State (Details) - Residential mortgage loans - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 2,574 | $ 2,180
% of Total | 100.00% | 100.00%
Florida |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 236 | $ 324
% of Total | 9.00% | 15.00%
Texas |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 181 | $ 215
% of Total | 7.00% | 10.00%
New Jersey |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 167 | $ 172
% of Total | 6.00% | 8.00%
Pennsylvania |  |
Schedule of Investments [Line Items] |  |
Amortized Cost |  | $ 153
% of Total |  | 7.00%
California |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 157 | $ 139
% of Total | 6.00% | 6.00%
NEW YORK |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 155 | $ 138
% of Total | 6.00% | 6.00%
Georgia |  |
Schedule of Investments [Line Items] |  |
Amortized Cost |  | $ 125
% of Total |  | 6.00%
All other states |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 1,678 | $ 914
% of Total | 66.00% | 42.00%

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