Earnings Per Share and Certain Related Information - Dividends (Details) - $ / shares						12 Months Ended
	Jan. 16, 2020	Sep. 19, 2019	Jul. 11, 2019	May 02, 2019	Jan. 17, 2019	Oct. 02, 2020	Sep. 27, 2019	Sep. 28, 2018
Earnings Per Share Reconciliation [Abstract]
Dividends declared (in dollars per share)			$ 0.17	$ 0.17	$ 0.17	$ 0.19
Dividends paid (in dollars per share)	$ 0.19	$ 0.17					$ 0.19	$ 0.19