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Schedule III-Supplementary Insurance Information
12 Months Ended
Dec. 31, 2023
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract]  
Schedule III-Supplementary Insurance Information
Schedule III — Supplementary Insurance Information
 Future
policy
benefits and
expenses
Unearned
premiums
Claims and
benefits
payable
Premium
revenues
Net
investment
income
Benefits
claims, losses
and
settlement
expenses
Other
operating
expenses*
 (in millions)
2023$420.9 $1.9 $15.7 $0.2 $0.4 $0.1 $0.5 
2022$434.9 $2.0 $17.1 $0.3 $1.3 $0.5 $1.0 
2021$628.3 $2.2 $19.2 $0.5 $1.3 $0.2 $0.5 
* Includes underwriting, general and administrative expenses.