Subsequent Event	9 Months Ended
	Jun. 25, 2021
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event Share Repurchase Program.    On July 29, 2021, we announced that our Board of Directors approved increasing the size of our stock repurchase program by $350 million, bringing the amount available for future repurchases of our Class A Common Stock to approximately $387 million. Stock repurchases under this program may be made through open market transactions, negotiated purchases, or otherwise, at times and in amounts that we consider appropriate. The timing of repurchases and the number of shares repurchased depend upon a variety of factors, including price, regulatory requirements, the rate of dilution from our equity compensation plans, and other market conditions. The program does not have a specified expiration date, and can be limited, suspended or terminated at our discretion at any time without prior notice. Shares repurchased under the program will be returned to the status of authorized but unissued shares of Class A common stock.