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Employee Stock Purchase and Stock Option Plans (Information Regarding Stock Option Plans) (Details) - $ / shares | 12 Months Ended
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Sep. 28, 2018 | Sep. 29, 2017 | Sep. 30, 2016
At fiscal year end: |  |  |
Range of exercise prices for options outstanding, minimum (in dollars per share) |  | $ 32.51 | $ 32.51
Range of exercise prices for options outstanding, maximum (in dollars per share) |  | $ 80.63 | $ 80.63
Number of options exercisable (in shares) | 1,557,900 | 1,992,022 | 2,581,421
For the fiscal year: |  |  |
Range of prices relating to options exercised, minimum (in dollars per share) |  | $ 37.03 | $ 36.88
Range of prices relating to options exercised, maximum (in dollars per share) |  | 55.53 | 55.00
Estimated weighted average fair values of options granted (in dollars per share) | $ 0.00 | $ 0.00 | $ 12.80

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- Definition Share Based Compensation Shares Authorized Under Stock Option Plans Exercised Price Range Upper Range Limit + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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