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Net Income Per Share - Reconciliation of Basic and Diluted Share Amounts (Detail) - shares shares in Thousands	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Earnings Per Share [Line Items]
Basic weighted average common shares outstanding	276,856	278,663
Weighted average common stock equivalents from assumed exercise of stock options and stock units	2,212	3,143
Incremental shares from Convertible Notes premium	1,734	2,418
Diluted weighted average common shares outstanding	280,802	284,224
Outstanding Stock Options
Weighted-average anti-dilutive shares related to:
Weighted-average anti-dilutive shares (in shares)	2,272	1,442
Restricted stock units
Weighted-average anti-dilutive shares related to:
Weighted-average anti-dilutive shares (in shares)	216	13

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Earnings Per Share [Line Items]

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible debt securities using the treasury stock method

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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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
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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.

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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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