Income Taxes - Schedule of Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 24, 2022
Deferred Tax Assets, Valuation Allowance [Roll Forward]
Beginning balance	$ 486,920	$ 168,308	$ 12,608
Valuation allowance, deferred tax asset, increase (decrease)	203,300
Ending balance	690,231	486,920	168,308
Additional Paid-In Capital
Deferred Tax Assets, Valuation Allowance [Roll Forward]
Valuation allowance, deferred tax asset, increase (decrease)	208,629	315,425	152,985
Other Comprehensive Income
Deferred Tax Assets, Valuation Allowance [Roll Forward]
Valuation allowance, deferred tax asset, increase (decrease)	0	0	0
Income Tax Expense
Deferred Tax Assets, Valuation Allowance [Roll Forward]
Valuation allowance, deferred tax asset, increase (decrease)	$ (5,318)	$ 3,187	$ 2,715