Restructuring and other strategic initiatives - Narratives (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2024	Jul. 01, 2023	Jun. 29, 2024	Jul. 01, 2023
Restructuring Cost and Reserve
Restructuring expenses	$ 1.6	$ 2.2	$ 2.8	$ 7.7
Employee Relocation
Restructuring Cost and Reserve
Restructuring expenses	$ 0.8	$ 0.5	$ 1.6