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Stockholders' Equity (Compensation Costs Related to Unvested Awards) (Details) $ in Millions | 12 Months Ended
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Sep. 29, 2017 USD ($)
Stock Options [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Unrecognized Compensation Cost for unvested awards | $ 20.0
Weighted average remaining recognition period (in years) | 1 year 7 months
Restricted Stock [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Unrecognized Compensation Cost for unvested awards | $ 83.9
Weighted average remaining recognition period (in years) | 1 year 6 months

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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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