Income taxes - Reconciliation items from U.S. statutory income tax rate to the effective tax rate (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
U.S. statutory income tax rate	21.00%	21.00%	21.00%
Foreign derived intangible income	(6.10%)	(6.80%)	(7.00%)
R&D tax credit	(2.00%)	(1.30%)	(0.90%)
Stock compensation	(2.10%)	(1.00%)	(0.70%)
Changes in uncertain tax positions	0.10%	0.00%	0.10%
Other	1.10%	0.30%	0.30%
Effective tax rate	12.00%	12.20%	12.80%