Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions					12 Months Ended
	Nov. 13, 2020	Jul. 31, 2020	Feb. 18, 2020	Nov. 05, 2019	Sep. 27, 2020	Sep. 29, 2019	Sep. 30, 2018
Subsequent Event [Line Items]
Cash dividends declared per common share (in usd per share)		$ 0.40	$ 0.40	$ 0.40	$ 1.20	$ 1.60	$ 1.60
Subsequent Event
Subsequent Event [Line Items]
Cash dividends declared per common share (in usd per share)	$ 0.40
Stock buy-back program, authorized amount	$ 100.0