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Investments (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Impairment on fixed maturities     $ 0 $ 0 $ 0
Amortized cost $ 3,000,000.0   3,000,000.0   3,000,000.0
Fair value 2,800,000   2,800,000   3,000,000.0
Mortgage backed and asset backed securities at fair value 7,700,000   7,700,000    
Mortgage servicing rights MSR impairment recovery     900,000    
Valuation allowances on mortgage loans         $ 0
Proceeds from sales of available-for-sale investments 81,200,000 $ 72,000,000.0 106,300,000 204,500,000  
Gross realized gain 300,000 400,000 1,200,000 2,200,000  
Gross realized losses 1,500,000 300,000 $ 1,100,000 $ 500,000  
Unrealized gains (losses) associated with assets of third party reinsurers that are retained by American Life $ 1,800,000 $ (1,900,000)      
Mortgage Loans Secured by Property | Delaware | Geographic Concentration Risk          
Concentration risk percentage         34.00%
Mortgage Loans Secured by Property | New York | Geographic Concentration Risk          
Concentration risk percentage     26.00%   32.00%
Mortgage Loans Secured by Property | Arizona | Geographic Concentration Risk          
Concentration risk percentage     5.00%   4.00%
Mortgage Loans Secured by Property | California | Geographic Concentration Risk          
Concentration risk percentage     7.00%   4.00%
Mortgage Loans Secured by Property | Florida | Geographic Concentration Risk          
Concentration risk percentage     5.00%    
Mortgage Loans Secured by Property | Non-US | Geographic Concentration Risk          
Concentration risk percentage     9.00%   9.00%