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Investments - Fixed Maturity Securities in Continuous Loss Position (Details) | Dec. 31, 2024 security | Dec. 31, 2024 position | Dec. 31, 2023 security | Dec. 31, 2023 position
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Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months | 1,862 | 1,862 | 2,305 | 2,305
Investment Grade |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 1,744 |  | 2,103
Non Investment Grade |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 62 |  | 139
AAA |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 155 |  | 226
AA |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 899 |  | 1,006
A |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 320 |  | 423
BBB |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 370 |  | 448
BB |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 40 |  | 93
B |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 18 |  | 39
CCC or lower |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 4 |  | 7
Not rated |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 56 |  | 63

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