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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
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Sep. 28, 2018 | Sep. 29, 2017 | Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |
Number of stock options outstanding, beginning balance (in shares) | 2,516,825 | 3,577,512 | 4,072,707
Number of stock options, Granted (in shares) | 0 | 0 | 460,770
Number of stock options, Exercised (in shares) | (636,019) | (906,648) | (412,416)
Number of stock options, Canceled or expired (in shares) | (114,047) | (154,039) | (543,549)
Number of stock options outstanding, ending balance (in shares) | 1,766,759 | 2,516,825 | 3,577,512
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) | $ 46.19 | $ 45.69 | $ 46.06
Weighted Average Exercise Price, Granted (in dollars per share) | 0.00 | 0.00 | 42.17
Weighted Average Exercise Price, Exercised (in dollars per share) | 46.93 | 43.79 | 40.88
Weighted Average Exercise Price, Canceled or expired (in dollars per share) | 52.26 | 48.79 | 49.13
Weighted Average Exercise Price, ending balance (in dollars per share) | $ 45.53 | $ 46.19 | $ 45.69

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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. + 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)(iv)(4) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + 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)(iv)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition 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 + Details
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- Definition 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 + Details
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