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Restructuring and Divestiture Charges (Tables) | 12 Months Ended
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Sep. 30, 2017
Restructuring and Related Activities [Abstract] |
Charges Taken Related to Restructuring Actions | The following table displays charges taken related to restructuring actions in fiscal 2017, 2016 and 2015 and a rollforward of the charges to the accrued balances as of September 30, 2017:
| Fiscal 2017 Actions |  | Fiscal 2016 Actions |  | Fiscal 2015 Actions |  | Fiscal 2014 Actions |  | Other Charges |  | Total
Restructuring and Divestiture Charges |  |  |  |  |  |  |  |  |  |  |
Fiscal 2015 charges: |  |  |  |  |  |  |  |  |  |  |
Workforce reductions | $ | — |  |  | $ | — |  |  | $ | 10.0 |  |  | $ | 6.0 |  |  | $ | 0.3 |  |  | $ | 16.3 |
Facility closure costs | — |  |  | — |  |  | — |  |  | 2.0 |  |  | 0.6 |  |  | 2.6 |
Fiscal 2015 restructuring charges | $ | — |  |  | $ | — |  |  | $ | 10.0 |  |  | $ | 8.0 |  |  | $ | 0.9 |  |  | $ | 18.9 |
Divestiture net charges |  |  |  |  |  |  |  |  |  |  | 9.6 |
Fiscal 2015 restructuring and divestiture charges |  |  |  |  |  |  |  |  |  |  | $ | 28.5 |
Fiscal 2016 charges: |  |  |  |  |  |  |  |  |  |  |
Workforce reductions | $ | — |  |  | $ | 10.5 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 10.5 |
Fiscal 2016 restructuring charges | $ | — |  |  | $ | 10.5 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 10.5 |
Fiscal 2017 charges: |  |  |  |  |  |  |  |  |  |  |
Workforce reductions | $ | 8.5 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 8.5 |
Facility closure costs | — |  |  | 4.8 |  |  | — |  |  | — |  |  | — |  |  | 4.8 |
Other | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Fiscal 2017 restructuring charges | $ | 8.5 |  |  | $ | 4.8 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $13.3
Charges Taken Related to Accrued Restructuring Actions |
| Fiscal 2017 Actions |  | Fiscal 2016 Actions |  | Fiscal 2015 Actions |  | Fiscal 2014 Actions |  | Other Charges |  | Total
Rollforward of Accrued Restructuring |  |  |  |  |  |  |  |  |  |  |
Balance as of September 27, 2014 | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 12.0 |  |  | $ | 4.9 |  |  | $ | 16.9 |
Fiscal 2015 restructuring charges | $ | — |  |  | $ | — |  |  | $ | 10.0 |  |  | $ | 8.0 |  |  | $ | 0.9 |  |  | $ | 18.9 |
Stock-based compensation | — |  |  | — |  |  | (4.1 | ) |  | — |  |  | — |  |  | (4.1 | )
Severance payments | — |  |  | — |  |  | (2.8 | ) |  | (16.2 | ) |  | (4.9 | ) |  | (23.9 | )
Other payments | — |  |  | — |  |  | — |  |  | (1.3 | ) |  | (0.8 | ) |  | (2.1 | )
Balance as of September 26, 2015 | $ | — |  |  | $ | — |  |  | $ | 3.1 |  |  | $ | 2.5 |  |  | $ | 0.1 |  |  | $ | 5.7 |
Fiscal 2016 restructuring charges | $ | — |  |  | $ | 10.5 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 10.5 |
Stock-based compensation | — |  |  | (0.4 | ) |  | — |  |  | — |  |  | — |  |  | (0.4 | )
Severance payments | — |  |  | (4.6 | ) |  | (2.9 | ) |  | (1.4 | ) |  | (0.1 | ) |  | (9.0 | )
Other payments | — |  |  | — |  |  | — |  |  | (0.5 | ) |  | — |  |  | (0.5 | )
Balance as of September 24, 2016 | $ | — |  |  | $ | 5.5 |  |  | $ | 0.2 |  |  | $ | 0.6 |  |  | $ | — |  |  | $ | 6.3 |
Fiscal 2017 restructuring charges | $ | 8.5 |  |  | $ | 4.8 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 13.3 |
Severance payments | (1.0 | ) |  | (5.4 | ) |  | (0.2 | ) |  | — |  |  | — |  |  | (6.6 | )
Other payments | — |  |  | (1.2 | ) |  | — |  |  | (0.3 | ) |  | — |  |  | (1.5 | )
Balance as of September 30, 2017 | $ | 7.5 |  |  | $ | 3.7 |  |  | $ | — |  |  | $ | 0.3 |  |  | $ | — |  |  | $ | 11.5 |

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 + Details
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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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