v3.26.1
Long Term Debt - Schedule of Debt Issued (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Apr. 30, 2026
Dec. 31, 2025
Jun. 13, 2025
Oct. 20, 2020
Jul. 02, 2020
Debt Instrument [Line Items]            
Principal $ 730.0   $ 855.0      
Unamortized discount and debt issuance costs (9.5)   (11.8)      
Junior Subordinated Debt            
Debt Instrument [Line Items]            
Principal   $ 125.0        
Fixed Rate Reset Subordinated Notes due 2055 | Senior Notes            
Debt Instrument [Line Items]            
Principal 400.0   400.0      
Unamortized discount and debt issuance costs $ (6.3)   $ (6.5)      
Fixed Rate Reset Subordinated Notes due 2055 | Junior Subordinated Debt            
Debt Instrument [Line Items]            
Interest rate, stated percentage       7.75%    
Fixed Rate Reset Subordinated Notes due 2055 | Subordinated Debt            
Debt Instrument [Line Items]            
Interest rate, stated percentage 7.75%   7.75%      
Senior Notes Due 2030 | Senior Notes            
Debt Instrument [Line Items]            
Principal $ 330.0   $ 330.0      
Unamortized discount and debt issuance costs $ (3.2)   $ (3.6)      
Interest rate, stated percentage 4.875%   4.875%     4.875%
Fixed Rate Reset Junior Subordinated notes due 2041 | Junior Subordinated Debt            
Debt Instrument [Line Items]            
Principal $ 0.0   $ 125.0      
Unamortized discount and debt issuance costs $ 0.0   $ (1.7)      
Interest rate, stated percentage 6.625%   6.625%   6.625%