Restructuring costs (Details) $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($) position
Restructuring costs
Accrued workforce reduction costs, Beginning of period	$ 8.8
Workforce reduction costs paid	(1.5)
Currency translation adjustments, net	(0.2)
Accrued workforce reduction costs, end of period	$ 7.1	$ 8.8
Workforce reductions | position		226
Workforce reduction
Restructuring costs
Workforce reduction costs accrued		$ 10.3