Employee Stock Purchase and Stock Incentive Plans (Unvested Restricted Stock and Restricted Stock Units Roll Forward) (Details) - Restricted Stock And Restricted Stock Units	12 Months Ended
	Oct. 02, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance outstanding (in shares) | shares	1,723,037
Granted (in shares) | shares	728,478
Vested (in shares) | shares	(850,054)
Canceled (in shares) | shares	(75,935)
Ending balance outstanding (in shares) | shares	1,525,526
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Beginning balance outstanding (in dollars per share) | $ / shares	$ 65.80
Granted (in dollars per share) | $ / shares	85.61
Vested (in dollars per share) | $ / shares	60.37
Canceled (in dollars per share) | $ / shares	75.86
Ending balance outstanding (in dollars per share) | $ / shares	$ 77.88