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Share-Based Employee Compensation (Summary of Stock Equivalent Activity) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value of shares issued in connection with director retirements (less than)	$ 0.1
Deferred Compensation for Non Management Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued in connection with director retiremenst (shares)	204	0	0
Nonvested restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in period (shares)	0
Shares released in period (shares)	33,243
Released, Weighted-Average Grant Date Fair Value (in usd per share)	$ 26.47

X

- Definition

The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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- Definition

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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- Definition

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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Number of shares issued under share-based payment arrangement.

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