Earnings Per Share (Narrative) (Details) shares in Millions	3 Months Ended
	Jan. 02, 2021 Classes shares	Dec. 28, 2019 shares
Earnings Per Share, Basic and Diluted [Line Items]
Number Of Classes Of Common Stock | Classes	2
Percentage amount of per share cash dividends paid to holders of Class B stock that cannot exceed paid to holders of Class A stock	90.00%
Class A [Member]
Earnings Per Share, Basic and Diluted [Line Items]
Undistributed earnings (losses), ratio used to calculate allocation to class of stock	1.0
Class B [Member]
Earnings Per Share, Basic and Diluted [Line Items]
Undistributed earnings (losses), ratio used to calculate allocation to class of stock	0.9
Share-based Payment Arrangement [Member]
Earnings Per Share, Basic and Diluted [Line Items]
Antidilutive securities excluded from computation of earnings per share, shares | shares	6	2