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Long Term Debt and Preference Securities (Tables)
9 Months Ended
Sep. 30, 2025
Debt Disclosure [Abstract]  
Schedule of Debt
The following table sets forth the principal amount of the debt issued as well as the unamortized discount and debt issuance costs at September 30, 2025 and December 31, 2024:
September 30, 2025December 31, 2024
PrincipalUnamortized discount and debt issuance costsPrincipalUnamortized discount and debt issuance costs
7.750% Fixed Rate Reset Subordinated notes due 2055
$400.0 $(6.6)$— $— 
4.875% Senior notes due 2030
330.0 (3.8)330.0 (4.4)
6.625% Fixed Rate Reset Junior Subordinated notes due 2041
125.0 (1.7)125.0 (1.7)
Total
$855.0 $(12.1)$455.0 $(6.1)
Schedule of Stock by Class
September 30,
2025
December 31, 2024
Preference securities, par value $0.01 per share
Authorized— 1,000,000 
Issued and outstanding:
9% cumulative preference shares
— 5,835 
The following table sets out the number and par value of shares authorized, issued and outstanding:
September 30, 2025December 31, 2024
Common shares, par value $0.01 per share
Authorized600,000,000 600,000,000 
Issued and outstanding
Common shares 103,026,764 111,730,209