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Employee Stock Purchase and Stock Option Plans (Stock Option Activity Under the 1999 Plans and the 1981 Plan) (Details) - $ / shares	12 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Sep. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of stock options outstanding, beginning balance (in shares)	1,766,759	2,516,825	3,577,512
Number of stock options, Granted (in shares)	0	0	0
Number of stock options, Exercised (in shares)	(828,529)	(636,019)	(906,648)
Number of stock options, Canceled or expired (in shares)	(11,624)	(114,047)	(154,039)
Number of stock options outstanding, ending balance (in shares)	926,606	1,766,759	2,516,825
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, beginning balance (in dollars per share)	$ 45.53	$ 46.19	$ 45.69
Weighted Average Exercise Price, Granted (in dollars per share)	0	0	0
Weighted Average Exercise Price, Exercised (in dollars per share)	45.63	46.93	43.79
Weighted Average Exercise Price, Canceled or expired (in dollars per share)	42.10	52.26	48.79
Weighted Average Exercise Price, ending balance (in dollars per share)	$ 45.48	$ 45.53	$ 46.19

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- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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