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Stock-Based Compensation - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jul. 31, 2018	Sep. 27, 2025	Sep. 28, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		0	0
Unrecognized stock-based compensation expense		$ 0	$ 0
Stock options to purchase common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		48 months
Exercisable period		10 years
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense		$ 78,100,000	$ 115,400,000
Unrecognized stock-based compensation expense, period of recognition		2 years 3 months 18 days	2 years 4 months 24 days
Restricted stock units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		1 year
Restricted stock units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		4 years
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense		$ 3,300,000	$ 200,000
Unrecognized stock-based compensation expense, period of recognition		1 year 3 months 18 days	1 year 6 months
2018 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of outstanding stock maximum	5.00%
Shares reserved for future issuance (in shares)		45,881,799

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