v3.26.3
Income taxes - Effective tax rate (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Income Taxes        
Effective tax rate 21.50% 26.30% 25.60% 31.80%
U.S. federal statutory income tax rate 21.00%   21.00%  
Valuation allowance   $ 1.1   $ 1.1