Investments - Fixed Maturity Securities in Continuous Loss Position (Details)	Jun. 30, 2026 security	Jun. 30, 2026 position	Dec. 31, 2025 security	Dec. 31, 2025 position
Debt Securities, Available-for-Sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months	1,565	1,565	1,649	1,649
Investment Grade
Debt Securities, Available-for-Sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		1,515		1,592
Non Investment Grade
Debt Securities, Available-for-Sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		32		34
AAA
Debt Securities, Available-for-Sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		131		140
AA
Debt Securities, Available-for-Sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		823		860
A
Debt Securities, Available-for-Sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		261		275
BBB
Debt Securities, Available-for-Sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		300		317
BB
Debt Securities, Available-for-Sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		19		24
B
Debt Securities, Available-for-Sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		10		8
CCC or lower
Debt Securities, Available-for-Sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		3		2
Not rated
Debt Securities, Available-for-Sale [Line Items]
Number of position with a gross unrealized loss, more than 12 months		18		23