Income Taxes (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
	Jul. 01, 2024	Mar. 30, 2025	Dec. 29, 2024	Mar. 31, 2024	Mar. 30, 2025	Mar. 31, 2024	Sep. 29, 2024
Income Tax Disclosure [Abstract]
Effective tax rate					86.70%	27.60%
Reduction in income tax expense due to excess tax benefits on share-based payments					$ 1,000	$ 1,900
Impairment of goodwill	$ 0	$ 92,416		$ 0	92,416	0
Nondeductible expense, impairment losses, amount					58,300
Legal fees		0	$ 115,000	$ 0	115,000	0
Nondeductible expense, legal contingency charge, amount					$ 31,300
Income tax expense, nonoperating						$ 2,800
Effective tax rates, excluding valuation allowance release, non-deductible goodwill impairment charge, transaction costs, and excess tax benefits on share-based payments					27.80%	27.10%
Liability for uncertain tax positions		$ 52,200			$ 52,200		$ 50,100