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
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