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Stock-based Compensation (Narrative) (Details) $ / shares in Units, shares in Thousands | 3 Months Ended
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Dec. 28, 2019 USD ($) shares / unit $ / shares shares | Dec. 29, 2018 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Common Stock Issuable per Restricted Stock Unit | shares / unit | 1 |
ESPP maximum contribution percentage | 10.00% |
ESPP maximum contribution amount by employee | $ 25,000 |
ESPP purchase price as a % of stock price | 85.00% |
Stock-based compensation | $ 27,936,000 | $ 29,407,000
TSR Units |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted, shares | shares | 89 |
Granted (in USD per share) | $ / shares | $ 106.69 |
ESPP |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Stock-based compensation | $ 1,500,000 | $ 1,300,000
Catch-Up Provision | TSR Units | Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted, shares | shares | 178 |

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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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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