Investments - Fixed Maturity Securities in Continuous Loss Position (Details)	Dec. 31, 2022 security	Dec. 31, 2022 position	Dec. 31, 2021 security	Dec. 31, 2021 position
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months	587	587	122	122
AAA
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		67		24
AA
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		217		38
A
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		94		3
BBB
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		93		14
BB
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		68		13
B
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		31		8
CCC or lower
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		2		0
Not rated
Debt Securities, Available-for-sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		15		22