XML 139 R109.htm IDEA: XBRL DOCUMENT v3.25.0.1
Segment Information - Schedule of Return on Equity (Details)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Segment Reporting Information [Line Items]      
ROE 7.00% 14.30% 8.80%
Operating Segments | Total Insurance Operations      
Segment Reporting Information [Line Items]      
ROE (3.70%) 4.20% 5.40%
Operating Segments | Standard Commercial Lines      
Segment Reporting Information [Line Items]      
ROE (4.00%) 5.00% 4.60%
Operating Segments | Standard Personal Lines      
Segment Reporting Information [Line Items]      
ROE (1.10%) (2.50%) (0.20%)
Operating Segments | E&S Lines      
Segment Reporting Information [Line Items]      
ROE 1.40% 1.70% 1.00%
Operating Segments | Investments      
Segment Reporting Information [Line Items]      
Net investment income earned 12.80% 12.40% 9.40%
Net realized and unrealized investment gains (losses) (0.10%) (0.10%) (3.60%)
ROE 12.70% 12.30% 5.80%
Reconciling Item, Corporate      
Segment Reporting Information [Line Items]      
ROE (2.00%) (2.20%) (2.40%)