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Earnings Per Share (Narrative) (Details) shares in Millions	12 Months Ended
	Sep. 30, 2017 Classes shares	Oct. 01, 2016 shares	Oct. 03, 2015 shares
Earnings Per Share, Basic and Diluted [Line Items]
Number of classes of common stock | Classes	2
Cash Dividends, Paid Ratio To Other Class Of Stock, Maximum	90.00%
Stock-based compensation [Member]
Earnings Per Share, Basic and Diluted [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares	1	0	5
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

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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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Number of classes of common stock

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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://www.xbrl.org/2003/role/presentationRef
-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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