Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Dec. 25, 2020	Dec. 27, 2019	Sep. 25, 2020
Shareholders' Equity
Dividends paid per common share	$ 0.48	$ 0.46
Unpaid portion of the dividend payment recorded in accrued and other current liabilities	$ 159		$ 317
Number of common shares repurchased	1	2
Repurchase value	$ 127	$ 143
Amount available for repurchase, at end of period	$ 868