Income taxes - Reconciliation items from U.S. statutory income tax rate to the effective tax rate (Details)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
U.S. statutory income tax rate	21.00%	21.00%	21.00%
Foreign derived intangible income	(4.00%)	(6.10%)	(6.80%)
R&D tax credit	(1.40%)	(2.00%)	(1.30%)
Stock compensation		(2.10%)	(1.00%)
Changes in uncertain tax positions		0.10%	0.00%
Other adjustments	0.30%	1.10%	0.30%
Effective tax rate	12.40%	12.00%	12.20%