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Debt - 1.625% Senior Convertible Notes (2026 Notes) (Details) - USD ($)		1 Months Ended	3 Months Ended		12 Months Ended
	Mar. 06, 2023	Mar. 22, 2017	Sep. 27, 2025	Sep. 28, 2024	Jul. 02, 2022	Aug. 20, 2025	Mar. 03, 2017
Debt details
Payment of debt issuance costs			$ 7,800,000	$ 0
1.625% Senior Convertible Notes
Debt details
Loss on convertible note settlement	$ 14,600,000
1.625% Senior Convertible Notes \| Convertible Notes
Debt details
Aggregate principal amount of convertible debt	$ 250,000,000
Stated interest rate	1.625%		1.625%			1.625%
Proceeds from debt before debt issuance costs	$ 118,000,000
Proceeds from Convertible Debt	113,800,000
Payment of debt issuance costs	4,200,000
Loss on convertible note extinguishment	2,200,000
Debt issuance costs, net	2,000,000
Expected remaining term			6 months
1.625% Senior Convertible Notes \| Convertible Notes \| Exchange Transaction
Debt details
Debt issued	132,000,000
Repayments of debt	127,500,000
Convertible note modification (Note 11)	$ 10,100,000
1.00% Senior Convertible Notes \| Convertible Notes
Debt details
Aggregate principal amount of convertible debt		$ 60,000,000					$ 400,000,000
Stated interest rate	1.00%						1.00%
Debt issued					$ 236,100,000
Payment of debt issuance costs		$ 8,900,000
Issuance costs	$ 300,000