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Restructuring Charges (Tables) | 12 Months Ended
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Sep. 26, 2020
Restructuring and Related Activities [Abstract] |
Charges Taken Related to Restructuring Actions | The following table displays charges taken related to restructuring actions in fiscal 2020, 2019 and 2018 and a rollforward of the charges to the accrued balances as of September 26, 2020:
| Fiscal 2020 Actions |  | Fiscal 2019 Actions |  | Fiscal 2018 Actions |  | Other |  |  |  | Total
Restructuring Charges |  |  |  |  |  |  |  |  |  |  |
Fiscal 2018 charges: |  |  |  |  |  |  |  |  |  |  |
Workforce reductions | $ | — |  |  | $ | — |  |  | $ | 11.7 |  |  | $ | — |  |  |  |  | $ | 11.7 |
Facility closure costs | — |  |  | — |  |  | 0.9 |  |  | 1.6 |  |  |  |  | 2.5 |
Fiscal 2018 restructuring charges | $ | — |  |  | $ | — |  |  | $ | 12.6 |  |  | $ | 1.6 |  |  |  |  | $ | 14.2 |
Fiscal 2019 charges: |  |  |  |  |  |  |  |  |  |  |
Workforce reductions | $ | — |  |  | $ | 4.0 |  |  | $ | 1.4 |  |  | $ | — |  |  |  |  | $ | 5.4 |
Facility closure costs | — |  |  | — |  |  | (0.2) |  |  | 1.4 |  |  |  |  | 1.2 |
Fiscal 2019 restructuring charges | $ | — |  |  | $ | 4.0 |  |  | $ | 1.2 |  |  | $ | 1.4 |  |  |  |  | $ | 6.6 |
Fiscal 2020 charges: |  |  |  |  |  |  |  |  |  |  |
Workforce reductions | $ | 13.2 |  |  | $ | 0.3 |  |  | $ | (0.1) |  |  | $ | — |  |  |  |  | $ | 13.4 |
Divestiture charges | 1.9 |  |  | — |  |  | — |  |  | — |  |  |  |  | 1.9 |
Fiscal 2020 restructuring charges | $ | 15.1 |  |  | $ | 0.3 |  |  | $ | (0.1) |  |  | $ | — |  |  |  |  | $ | 15.3 |
Charges Taken Related to Accrued Restructuring Actions |
| Fiscal 2020 Actions |  | Fiscal 2019 Actions |  | Fiscal 2018 Actions |  | Fiscal 2017 Actions |  | Previous Other Charges |  | Total
Rollforward of Accrued Restructuring |  |  |  |  |  |  |  |  |  |  |
Balance as of September 30, 2017 | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 7.5 |  |  | $ | 4.0 |  |  | $ | 11.5 |
Fiscal 2018 restructuring charges | $ | — |  |  | $ | — |  |  | $ | 12.6 |  |  | $ | — |  |  | $ | 1.6 |  |  | $ | 14.2 |
Stock-based compensation | — |  |  | — |  |  | (1.3) |  |  | — |  |  | — |  |  | (1.3) |
Severance payments and adjustments | — |  |  | — |  |  | (6.8) |  |  | (6.7) |  |  | (0.2) |  |  | (13.7) |
Other payments | — |  |  | — |  |  | (0.2) |  |  | — |  |  | (1.4) |  |  | (1.6) |
Balance as of September 29, 2018 | $ | — |  |  | $ | — |  |  | $ | 4.3 |  |  | $ | 0.8 |  |  | $ | 4.0 |  |  | $ | 9.1 |
Fiscal 2019 restructuring charges | $ | — |  |  | $ | 4.0 |  |  | $ | 1.2 |  |  | $ | — |  |  | $ | 1.4 |  |  | $ | 6.6 |
Severance payments and adjustments | — |  |  | (3.0) |  |  | (3.9) |  |  | (0.8) |  |  | — |  |  | (7.7) |
Other payments | — |  |  | — |  |  | (0.5) |  |  | — |  |  | (1.6) |  |  | (2.1) |
Balance as of September 28, 2019 | $ | — |  |  | $ | 1.0 |  |  | $ | 1.1 |  |  | $ | — |  |  | $ | 3.8 |  |  | $ | 5.9 |
Fiscal 2020 restructuring charges | $ | 15.1 |  |  | $ | 0.3 |  |  | $ | (0.1) |  |  | $ | — |  |  | $ | — |  |  | $ | 15.3 |
Stock-based compensation | (7.5) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (7.5) |
Severance payments and adjustments | (4.4) |  |  | (1.3) |  |  | (0.2) |  |  | — |  |  | — |  |  | (5.9) |
Other payments and adjustments (1) | 0.5 |  |  | — |  |  | — |  |  | — |  |  | (3.8) |  |  | (3.3) |
Balance as of September 26, 2020 | $ | 3.7 |  |  | $ | — |  |  | $ | 0.8 |  |  | $ | — |  |  | $ | — |  |  | $ | 4.5 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 3: http://fasb.org/us-gaap/role/ref/legacyRef -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=115931487&loc=d3e140904-122747 + 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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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=115931487&loc=d3e140904-122747 + Details
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