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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Apr. 02, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets Excluding Goodwill | Intangible assets consist of the following (in millions):
|  | As of |  | As of
| Weighted Average Amortization Period (Years) | April 2, 2021 |  | October 2, 2020
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Customer relationships | 5.0 | $ | 18.2 |  |  | $ | (17.6) |  |  | $ | 0.6 |  |  | $ | 18.2 |  |  | $ | (15.8) |  |  | $ | 2.4 |
Developed technology and other | 4.6 | 76.7 |  |  | (52.0) |  |  | 24.7 |  |  | 101.0 |  |  | (81.6) |  |  | 19.4 |
Trademarks | 3.0 | — |  |  | — |  |  | — |  |  | 1.6 |  |  | (1.5) |  |  | 0.1 |
Technology licenses | 3.1 | 29.4 |  |  | (19.4) |  |  | 10.0 |  |  | 26.3 |  |  | (14.2) |  |  | 12.1 |
IPR&D |  | 3.8 |  |  | — |  |  | 3.8 |  |  | 19.5 |  |  | — |  |  | 19.5 |
Total intangible assets |  | $ | 128.1 |  |  | $ | (89.0) |  |  | $ | 39.1 |  |  | $ | 166.6 |  |  | $ | (113.1) |  |  | $ | 53.5 |
Schedule Of Expected Annual Amortization Expense Related To Intangible Assets For The Next Five Years | Annual amortization expense for the next five fiscal years related to definite-lived intangible assets, excluding IPR&D, is expected to be as follows (in millions):
| Remaining 2021 |  | 2022 |  | 2023 |  | 2024 |  | 2025 |  | Thereafter
Amortization expense, cost of goods sold | $ | 2.7 |  |  | $ | 5.4 |  |  | $ | 5.4 |  |  | $ | 1.9 |  |  | $ | 0.1 |  |  | $ | 1.7 |
Amortization expense, operating expense | $ | 8.3 |  |  | $ | 5.7 |  |  | $ | 1.3 |  |  | $ | 1.0 |  |  | $ | 0.9 |  |  | $ | 0.9 |
Total amortization expense | $ | 11.0 |  |  | $ | 11.1 |  |  | $ | 6.7 |  |  | $ | 2.9 |  |  | $ | 1.0 |  |  | $ | 2.6 |

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