Share-Based Compensation - Fair Value Assumptions (Details) - $ / shares	12 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	4 years 6 months
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	61.00%	62.00%	51.00%
Expected dividend yield	0.00%	0.00%	0.00%
Risk-free interest rate	4.17%	4.24%	3.78%
Weighted-average grant-date fair value (in dollars per share)	$ 33.55	$ 16.30	$ 6.17
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)		4 years 6 months	4 years 6 months
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)		5 years	6 years