v3.26.1
Losses, Claims and Settlement Expenses (Tables)
6 Months Ended
Jun. 30, 2026
Insurance [Abstract]  
Schedule of Changes in Aggregate Reserves for Losses, Claims and Settlement Expenses
The following table shows changes in aggregate reserves for the Company's loss and loss adjustment expenses:

Six Months Ended
June 30,
20262025
Gross reserves at beginning of period$14,775.7 $13,727.7 
Less: Reinsurance losses recoverable
6,399.1 5,807.1 
Net reserves at beginning of period:
Specialty Insurance
7,826.6 7,341.5 
Title Insurance545.7 572.7 
Other4.1 6.4 
Subtotal
8,376.5 7,920.6 
Incurred loss and loss adjustment expenses:
Provisions for insured events of the current year:
Specialty Insurance
1,702.3 1,638.8 
Title Insurance53.7 45.4 
Other2.2 3.7 
Subtotal
1,758.3 1,687.9 
Change in provision for insured events of prior years:
Specialty Insurance
(16.6)(77.7)
Title Insurance(12.8)(9.0)
Other(1.1)(1.8)
Subtotal
(30.6)(88.6)
Total incurred loss and loss adjustment expenses1,727.6 1,599.3 
Payments:
Loss and loss adjustment expenses attributable to
   insured events of the current year:
Specialty Insurance
398.1 389.2 
Title Insurance3.1 2.6 
Other1.3 1.7 
Subtotal
402.6 393.6 
Loss and loss adjustment expenses attributable to
   insured events of prior years:
Specialty Insurance
1,098.4 962.6 
Title Insurance33.0 40.9 
Other1.1 2.1 
Subtotal
1,132.6 1,005.8 
Total payments1,535.2 1,399.5 
Net reserves at end of period:
Specialty Insurance
8,015.7 7,550.5 
Title Insurance550.4 565.4 
Other2.7 4.3 
Subtotal
8,568.9 8,120.4 
Reinsurance losses recoverable6,757.9 6,236.0 
Gross reserves at end of period
$15,326.9 $14,356.4 

Overall, the 2026 change in provision for insured events of prior years reflects favorable prior year loss reserve development for the first six months of 2026 for all groups shown, although at a significantly lower level compared to last year on a consolidated basis.

During the first six months of 2026, Specialty Insurance experienced a significant level of favorable development from accident years 2015 through 2019 and 2023. Net favorable development was predominantly from property and commercial auto with workers' compensation also contributing a strong level of favorable development. This was partially offset by unfavorable development of approximately $40 (1.5 points) from run-off transactional risk business and a modest level of unfavorable development in general liability.
For Title Insurance, favorable development experienced during the first six months of 2026 occurred largely from 2019, 2021, and 2022, partially offset by unfavorable development from 2020 and 2024.