v3.26.3
Revenue - Schedule of Components of Interest and Other Income (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Disaggregation of Revenue [Line Items]        
Book-of-business settlements $ 20 $ 6 $ 32 $ 11
Interest income 35 42 108 121
Other income 1 0 3 5
Total interest and other income 56 48 143 137
HWC [Member]        
Disaggregation of Revenue [Line Items]        
Book-of-business settlements 2 0 4 2
Interest income 7 8 22 22
Other income 0 0 0 1
Total interest and other income 9 8 26 25
R&B [Member]        
Disaggregation of Revenue [Line Items]        
Book-of-business settlements 18 6 28 9
Interest income 26 28 75 73
Other income 1 0 2 4
Total interest and other income 45 34 105 86
Corporate Segment [Member]        
Disaggregation of Revenue [Line Items]        
Book-of-business settlements 0 0 0 0
Interest income 2 6 11 26
Other income 0 0 1 0
Total interest and other income [1] $ 2 $ 6 $ 12 $ 26
[1] Reimbursable expenses and other, as well as Corporate revenue, are excluded from segment revenue, but included in total revenue on the condensed consolidated statements of comprehensive income. Amounts included in Corporate revenue may include eliminations, adjustments to reserves and impacts from hedged revenue transactions.