v3.26.3
Segments of Operations - Narrative (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
segment
Sep. 30, 2025
Segment Reporting [Line Items]        
Number of segments | segment     2  
Percent of total revenue derived from sales of property and casualty insurance outside of the United States 3.00% 4.00% 4.00% 4.00%
Other        
Segment Reporting [Line Items]        
Special charges to increase A&E liabilities | $ $ (24) $ (25)