Investments - Concentrations of Credit Risk - Investment Portfolio (Details)	12 Months Ended
	Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]
State and municipal governments, percent of invested assets at fair value	14.00%
Investment portfolio | Credit Concentration Risk
Debt Securities, Available-for-sale [Line Items]
Concentration risk percentage	100.00%
Texas
Debt Securities, Available-for-sale [Line Items]
State and municipal governments, percent of invested assets at fair value	21.00%
CALIFORNIA
Debt Securities, Available-for-sale [Line Items]
State and municipal governments, percent of invested assets at fair value	9.00%
New York
Debt Securities, Available-for-sale [Line Items]
State and municipal governments, percent of invested assets at fair value	8.00%
Florida
Debt Securities, Available-for-sale [Line Items]
State and municipal governments, percent of invested assets at fair value	4.00%
Pennsylvania
Debt Securities, Available-for-sale [Line Items]
State and municipal governments, percent of invested assets at fair value	4.00%
Fixed maturities available for sale | Investment portfolio | Credit Concentration Risk
Debt Securities, Available-for-sale [Line Items]
Concentration risk percentage	86.00%
Policy loans | Investment portfolio | Credit Concentration Risk
Debt Securities, Available-for-sale [Line Items]
Concentration risk percentage	4.00%
Other | Investment portfolio | Credit Concentration Risk
Debt Securities, Available-for-sale [Line Items]
Concentration risk percentage	10.00%
Corporates | Investment portfolio | Credit Concentration Risk
Debt Securities, Available-for-sale [Line Items]
Concentration risk percentage	69.00%
Investment grade securities: | Corporates | Fixed maturities available for sale | Investment portfolio | Credit Concentration Risk
Debt Securities, Available-for-sale [Line Items]
Concentration risk percentage	67.00%
Investment grade securities: | States, municipalities, and political subdivisions | Fixed maturities available for sale | Investment portfolio | Credit Concentration Risk
Debt Securities, Available-for-sale [Line Items]
Concentration risk percentage	14.00%
Investment grade securities: | U.S. Government direct, guaranteed, and government-sponsored enterprises | Fixed maturities available for sale | Investment portfolio | Credit Concentration Risk
Debt Securities, Available-for-sale [Line Items]
Concentration risk percentage	2.00%
Investment grade securities: | Other | Fixed maturities available for sale | Investment portfolio | Credit Concentration Risk
Debt Securities, Available-for-sale [Line Items]
Concentration risk percentage	1.00%
Below investment grade securities: | Corporates | Fixed maturities available for sale | Investment portfolio | Credit Concentration Risk
Debt Securities, Available-for-sale [Line Items]
Concentration risk percentage	2.00%