Income Taxes (Income Tax Expense Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 29, 2023	Sep. 30, 2022	Oct. 01, 2021
Income Tax Disclosure [Abstract]
Tax expense at United States statutory rate	$ 226,500	$ 310,100	$ 335,700
Foreign tax rate difference	(90,700)	(105,300)	(111,700)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount	16,000	(13,100)	(6,700)
Research and development credits	(29,700)	(26,100)	(27,000)
Change in tax reserve	(8,100)	7,400	51,500
EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomeAmount	16,300	36,100	25,500
EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncome	(65,900)	(39,900)	(79,700)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	15,400	32,200	15,800
Provision for income taxes	$ 96,000	$ 201,400	$ 100,400