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Earnings Per Share - Narrative (Details) - $ / shares shares in Millions | 3 Months Ended
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Dec. 28, 2019 | Dec. 29, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Number of options to purchase common stock outstanding (in shares) | 2.6 | 2.3
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 0.4 |
Stock Option |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 1.0 | 1.1
Restricted Stock |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 0.3 |
Minimum |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Options to purchase common stock (in dollars per share) | $ 8.56 | $ 6.43
Maximum |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Options to purchase common stock (in dollars per share) | $ 38.10 | $ 38.10

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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=116856206&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://fasb.org/us-gaap/role/ref/legacyRef -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=116856206&loc=d3e5070-113901 + Details
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