Earnings (Loss) Per Share (Details) - shares shares in Millions	3 Months Ended	6 Months Ended
Mar. 27, 2020	Mar. 29, 2019	Mar. 27, 2020	Mar. 29, 2019
Earnings (Loss) Per Share
Basic (in shares)	334	338	334	340
Dilutive impact of share-based compensation arrangements (in shares)		2		2
Diluted (in shares)	334	340	334	342
Share options
Antidilutive shares excluded from computation of earnings per share
Antidilutive share options	3	1	3	1
Nonvested share awards and options, antidilutive due to loss in period
Antidilutive shares excluded from computation of earnings per share
Antidilutive share options	1		2

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.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

+ References

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-Publisher FASB
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- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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