XML 151 R135.htm IDEA: XBRL DOCUMENT v3.25.0.1
Reinsurance - Effects Of Reinsurance (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Premiums and other considerations:      
Premiums and other considerations, Direct $ 7,381.8 $ 6,962.2 $ 5,796.1
Premiums and other considerations, Ceded (531.6) (491.3) (456.4)
Net premiums and other considerations 6,850.2 6,470.9 5,339.7
Benefits, claims and settlement expenses:      
Benefits, claims and settlement expenses, Direct 10,131.5 9,365.4 8,103.6
Benefits, claims and settlement expenses, Ceded (2,058.9) (1,577.2) (1,472.3)
Net benefits, claims and settlement expenses 8,072.6 7,788.2 6,631.3
Liability for future policy benefits remeasurement (gain) loss:      
Liability for future policy benefits remeasurement (gain) loss, Direct 252.7 737.4 (179.5)
Liability for future policy benefits remeasurement (gain) loss, Ceded 418.7 (789.0) (85.0)
Net liability for future policy benefits remeasurement (gain) loss $ 671.4 $ (51.6) $ (264.5)