Stock-Based Compensation (Employee Stock Purchase Plan) (Details) - Employee Stock Purchase Plan - $ / shares shares in Thousands	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of payroll deductions for funding of employee purchases of company stock (in months)	6 months
Percentage of the lower of the market price at which employees can purchase company stock	85.00%
Period at which purchase price is measured at lower of market price (in months)	6 months
Minimum period to hold employee purchased company stock	18 months
Shares available for future grant under stock plan (in shares)	530
Expiration date	Dec. 31, 2021
Issuance for employee stock purchase plan (in shares)	52	34	24
Employee stock purchase plan per share weighted average price of shares issued (in dollars per share)	$ 22.17	$ 34.11	$ 44.39