Income Taxes - Tax rate reconciliation (Details)	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Reconciliation of federal statutory tax rate to effective tax rate
Federal statutory rate	21.00%	21.00%	21.00%
Foreign tax rate benefit	(9.20%)	(33.20%)	(6.20%)
Current period valuation allowance	(18.90%)	0.00%	0.00%
Change in prior period valuation allowance	(12.90%)	(1.50%)	(0.30%)
GILTI and Subpart F income, net of foreign tax credits	(4.30%)	(24.20%)	16.50%
(Nondeductible) nontaxable foreign items	(3.10%)	(26.00%)	4.50%
(Nondeductible) nontaxable domestic items	(0.90%)	(3.60%)	0.70%
Nondeductible officer compensation	(0.80%)	1.30%	2.00%
Return to provision adjustments	(0.30%)	16.50%	(2.00%)
State tax expense	0.00%	(1.50%)	1.20%
Base erosion and anti-abuse tax	0.00%	(7.40%)	0.00%
Other tax effects of equity compensation	0.10%	1.10%	(0.30%)
Foreign withholding taxes	0.30%	(2.20%)	0.40%
Excess tax benefit of stock-based compensation	0.60%	4.00%	(1.10%)
Release of prior year unrecognized tax benefits	1.20%	0.00%	(0.40%)
Research and development tax credits	4.20%	26.90%	(5.50%)
Other	(0.40%)	(1.10%)	(0.90%)
Effective tax rate	(23.40%)	(29.90%)	29.60%