Shareholders' Equity - Shares of Common Stock (Details) - shares shares in Thousands	12 Months Ended
	Sep. 25, 2021	Sep. 26, 2020	Sep. 28, 2019
Increase (Decrease) in Shares of Common Stock Outstanding [Roll Forward]
Common stock outstanding, beginning balances (in shares)	16,976,763
Common stock repurchased (in shares)	(656,000)
Common stock outstanding, ending balances (in shares)	16,426,786	16,976,763
Common stock
Increase (Decrease) in Shares of Common Stock Outstanding [Roll Forward]
Common stock outstanding, beginning balances (in shares)	16,976,763	17,772,945	19,019,943
Common stock repurchased (in shares)	(656,340)	(917,270)	(1,380,819)
Common stock issued, net of shares withheld for employee taxes (in shares)	106,363	121,088	133,821
Common stock outstanding, ending balances (in shares)	16,426,786	16,976,763	17,772,945