Earnings Per Share (Narrative) (Details) shares in Millions	3 Months Ended		6 Months Ended
	Apr. 01, 2017 shares	Apr. 02, 2016 shares	Apr. 01, 2017 Classes shares	Apr. 02, 2016 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%		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
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
Stock Compensation Plan [Member]
Earnings Per Share, Basic and Diluted [Line Items]
Antidilutive securities excluded from computation of earnings per share, shares | shares	2	0	2	2