XML 86 R68.htm IDEA: XBRL DOCUMENT v3.22.4
Historical Loss and LAE Development - Cumulative Paid Loss and Loss Adjustment Expenses, Net of Reinsurance (Details)
Dec. 31, 2022
Property segment  
Shortduration Insurance Contracts Historical Claims Duration [Line Items]  
Average annual percentage payout of incurred losses by age, Year 1 50.40%
Average annual percentage payout of incurred losses by age, Year 2 31.10%
Average annual percentage payout of incurred losses by age, Year 3 6.70%
Average annual percentage payout of incurred losses by age, Year 4 2.90%
Average annual percentage payout of incurred losses by age, Year 5 2.10%
Average annual percentage payout of incurred losses by age, Year 6 1.10%
Average annual percentage payout of incurred losses by age, Year 7 0.40%
Average annual percentage payout of incurred losses by age, Year 8 0.50%
Average annual percentage payout of incurred losses by age, Year 9 (0.10%)
Average annual percentage payout of incurred losses by age, Year 10 0.00%
Surety Segment  
Shortduration Insurance Contracts Historical Claims Duration [Line Items]  
Average annual percentage payout of incurred losses by age, Year 1 19.60%
Average annual percentage payout of incurred losses by age, Year 2 35.60%
Average annual percentage payout of incurred losses by age, Year 3 14.50%
Average annual percentage payout of incurred losses by age, Year 4 7.30%
Average annual percentage payout of incurred losses by age, Year 5 3.60%
Average annual percentage payout of incurred losses by age, Year 6 (0.30%)
Average annual percentage payout of incurred losses by age, Year 7 0.60%
Average annual percentage payout of incurred losses by age, Year 8 (3.30%)
Average annual percentage payout of incurred losses by age, Year 9 (0.10%)
Average annual percentage payout of incurred losses by age, Year 10 2.00%
Primary Occurrence | Casualty Segment  
Shortduration Insurance Contracts Historical Claims Duration [Line Items]  
Average annual percentage payout of incurred losses by age, Year 1 13.30%
Average annual percentage payout of incurred losses by age, Year 2 13.30%
Average annual percentage payout of incurred losses by age, Year 3 14.40%
Average annual percentage payout of incurred losses by age, Year 4 16.10%
Average annual percentage payout of incurred losses by age, Year 5 11.00%
Average annual percentage payout of incurred losses by age, Year 6 7.60%
Average annual percentage payout of incurred losses by age, Year 7 5.30%
Average annual percentage payout of incurred losses by age, Year 8 3.80%
Average annual percentage payout of incurred losses by age, Year 9 2.20%
Average annual percentage payout of incurred losses by age, Year 10 4.80%
Excess Occurrence | Casualty Segment  
Shortduration Insurance Contracts Historical Claims Duration [Line Items]  
Average annual percentage payout of incurred losses by age, Year 1 4.00%
Average annual percentage payout of incurred losses by age, Year 2 13.00%
Average annual percentage payout of incurred losses by age, Year 3 14.00%
Average annual percentage payout of incurred losses by age, Year 4 13.10%
Average annual percentage payout of incurred losses by age, Year 5 9.90%
Average annual percentage payout of incurred losses by age, Year 6 5.80%
Average annual percentage payout of incurred losses by age, Year 7 6.10%
Average annual percentage payout of incurred losses by age, Year 8 9.00%
Average annual percentage payout of incurred losses by age, Year 9 4.00%
Average annual percentage payout of incurred losses by age, Year 10 1.40%
Claims Made | Casualty Segment  
Shortduration Insurance Contracts Historical Claims Duration [Line Items]  
Average annual percentage payout of incurred losses by age, Year 1 3.60%
Average annual percentage payout of incurred losses by age, Year 2 15.90%
Average annual percentage payout of incurred losses by age, Year 3 19.60%
Average annual percentage payout of incurred losses by age, Year 4 16.20%
Average annual percentage payout of incurred losses by age, Year 5 11.30%
Average annual percentage payout of incurred losses by age, Year 6 7.90%
Average annual percentage payout of incurred losses by age, Year 7 3.30%
Average annual percentage payout of incurred losses by age, Year 8 4.70%
Average annual percentage payout of incurred losses by age, Year 9 1.10%
Average annual percentage payout of incurred losses by age, Year 10 1.90%
Transportation | Casualty Segment  
Shortduration Insurance Contracts Historical Claims Duration [Line Items]  
Average annual percentage payout of incurred losses by age, Year 1 15.00%
Average annual percentage payout of incurred losses by age, Year 2 18.80%
Average annual percentage payout of incurred losses by age, Year 3 16.80%
Average annual percentage payout of incurred losses by age, Year 4 15.80%
Average annual percentage payout of incurred losses by age, Year 5 11.00%
Average annual percentage payout of incurred losses by age, Year 6 8.00%
Average annual percentage payout of incurred losses by age, Year 7 4.90%
Average annual percentage payout of incurred losses by age, Year 8 2.50%
Average annual percentage payout of incurred losses by age, Year 9 1.60%
Average annual percentage payout of incurred losses by age, Year 10 0.90%