Other noncurrent assets (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Other noncurrent assets:
Operating lease right-of-use assets	$ 20.0	$ 19.9
IBNR receivables	16.4	14.8
Restricted cash and cash equivalents	6.0	6.1
Pension asset	18.2	20.4
Other	26.0	20.7
Total	88.6	$ 81.9
Income taxes | Contran
Other noncurrent assets:
Contran - income taxes	$ 2.0