Investments - Fixed Maturity Securities in Continuous Loss Position (Details)	Dec. 31, 2023 security	Dec. 31, 2023 position	Dec. 31, 2022 security	Dec. 31, 2022 position
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months	2,305	2,305	587	587
Investment Grade
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		2,103		471
Non Investment Grade
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		139		101
AAA
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		226		67
AA
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		1,006		217
A
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		423		94
BBB
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		448		93
BB
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		93		68
B
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		39		31
CCC or lower
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		7		2
Not rated
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		63		15