XML 80 R68.htm IDEA: XBRL DOCUMENT v3.25.3
Segment Information - Schedule of Return on Equity (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Segment Reporting Information [Line Items]        
ROE 14.00% 12.60% 13.00% 5.00%
Operating Segments | Total Insurance Operations        
Segment Reporting Information [Line Items]        
ROE 1.60% 0.60% 2.00% (5.60%)
Operating Segments | Standard Commercial Lines        
Segment Reporting Information [Line Items]        
ROE (1.00%) 0.80% (0.10%) (5.40%)
Operating Segments | Standard Personal Lines        
Segment Reporting Information [Line Items]        
ROE (1.00%) (2.60%) 0.00% (1.80%)
Operating Segments | E&S Lines        
Segment Reporting Information [Line Items]        
ROE 3.60% 2.40% 2.10% 1.60%
Operating Segments | Investments        
Segment Reporting Information [Line Items]        
Net investment income earned 13.60% 13.10% 13.20% 12.60%
Net realized and unrealized investment gains (losses) 0.80% 0.50% 0.40% 0.20%
ROE 14.40% 13.60% 13.60% 12.80%
Other        
Segment Reporting Information [Line Items]        
ROE (2.00%) (1.60%) (2.60%) (2.20%)