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Employee Stock Purchase and Stock Option Plans (Information Regarding Options Outstanding, and Options Exercisable) (Details) - $ / shares	12 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 30, 2016	Oct. 02, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number (in shares)	1,766,759	2,516,825	3,577,512	4,072,707
Options Outstanding, Weighted Average Remaining Contractual Life (years)	4 years 7 months 24 days
Options Outstanding, Weighted Average Price (in dollars per share)	$ 45.53	$ 46.19	$ 45.69	$ 46.06
Options Exercisable, Number (in shares)	1,557,900
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 45.93
$32.51 - $37.03
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number (in shares)	153,000
Options Outstanding, Weighted Average Remaining Contractual Life (years)	3 years 5 months 27 days
Options Outstanding, Weighted Average Price (in dollars per share)	$ 37.01
Options Exercisable, Number (in shares)	153,000
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 37.01
$37.43 - $46.09
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number (in shares)	1,059,647
Options Outstanding, Weighted Average Remaining Contractual Life (years)	4 years 10 months 13 days
Options Outstanding, Weighted Average Price (in dollars per share)	$ 42.69
Options Exercisable, Number (in shares)	850,788
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 42.74
$47.11 - $55.13
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number (in shares)	513,237
Options Outstanding, Weighted Average Remaining Contractual Life (years)	4 years 5 months 23 days
Options Outstanding, Weighted Average Price (in dollars per share)	$ 52.74
Options Exercisable, Number (in shares)	513,237
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 52.74
$60.08 - $80.63
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number (in shares)	40,875
Options Outstanding, Weighted Average Remaining Contractual Life (years)	5 years 3 months
Options Outstanding, Weighted Average Price (in dollars per share)	$ 60.33
Options Exercisable, Number (in shares)	40,875
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 60.33

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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