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Earnings Per Share (Narrative) (Details) shares in Millions	3 Months Ended
	Dec. 28, 2019 Classes shares	Dec. 29, 2018 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
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	2	4

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Cash Dividends, Paid Ratio To Other Class Of Stock, Maximum

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Earnings Per Share, Basic and Diluted [Line Items]

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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