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Stockholders' Equity and Stock-Based Compensation - Information Pertaining to Stock Options Granted and Related Assumptions (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Sep. 25, 2021	Sep. 26, 2020	Sep. 28, 2019
Share-based Payment Arrangement [Abstract]
Options granted (in shares)	0.6	1.0	1.0
Weighted-average exercise price	$ 68.62	$ 45.96	$ 41.36
Weighted average grant date fair value (in usd per share)	$ 19.86	$ 13.92	$ 13.54
Assumptions:
Risk-free interest rates	0.40%	1.70%	3.00%
Expected life (in years)	4 years 9 months 18 days	4 years 9 months 18 days	4 years 9 months 18 days
Expected volatility	35.00%	33.60%	34.30%
Dividend yield	$ 0.0	$ 0.0	$ 0.0

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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-Publisher FASB
-Name Accounting Standards Codification
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Disclosure of the weighted average expected dividend for an entity using a valuation technique with different dividend rates during the contractual term.

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Rate of weighted-average expected volatility for award under share-based payment arrangement.

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Net number of share options (or share units) granted during the period.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Weighted average grant-date fair value of non-vested options outstanding.

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