Restructuring charges - Schedule Restructuring and Related Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ (1.3)	$ (0.5)
Severance payments
Restructuring Cost and Reserve [Line Items]
Restructuring costs	(0.2)	(0.5)
Employee benefits
Restructuring Cost and Reserve [Line Items]
Restructuring costs	(1.1)	0.0
Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring costs	(0.9)	(0.3)
Corporate | SG&A
Restructuring Cost and Reserve [Line Items]
Restructuring costs	(0.3)	(0.1)
Corporate | R&D
Restructuring Cost and Reserve [Line Items]
Restructuring costs	(0.1)	(0.1)
MCM Products | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring costs	(0.8)	(0.1)
All other segments | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ (0.1)	$ (0.2)