Mergers and acquisitions - Summary of Integration Costs Incurred (Details) - Seaspine Holdings Corporation [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Compensation-related integration costs	$ 4.0	$ 17.7
International spine restructuring	0.5	1.3
Fee paid to financial advisor to the Merger	0.0	5.5
Professional fees / consulting fees	2.1	5.8
Product rationalization charges	9.7	6.0
Other costs	1.5	1.4
Total	$ 17.8	$ 37.7