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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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.

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Share-Based Employee Compensation (Summary of RSU Activity) (Details) - Nonvested stock units - $ / shares	12 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average period for unrecognized compensation cost, (in years)	1 year 4 months 24 days
Vesting period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Stock awards outstanding, Beginning balance, Shares	311,845
Granted in period (shares)	76,429
Released (in shares)	(126,694)
Forfeited (in shares)	(86,439)
Stock awards outstanding, Ending balance, Shares	175,141	311,845
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Stock awards outstanding, Weighted-Average Grant Date Fair Value, Beginning balance (in usd per share)	$ 66.18
Granted, Weighted-Average Grant Date Fair Value (in usd per share)	73.94	$ 86.08	$ 94.93
Released, Weighted-Average Grant Date Fair Value (in usd per share)	68.39
Cancelled, Weighted-Average Grant Date Fair Value(in usd per share)	83.05
Stock awards outstanding, Weighted-Average Grant Date Fair Value, Ending balance (in usd per share)	$ 59.65	$ 66.18
Non-Management Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	12 months
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Stock awards outstanding, Ending balance, Shares	64,836