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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Oct. 02, 2020
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) | October 2, 2020 |  | September 27, 2019
| Gross carrying amount |  | Accumulated amortization |  | Net carrying amount |  | Gross carrying amount |  | Accumulated amortization |  | Net carrying amount
Customer relationships | 5.0 | $ | 18.2 |  |  | $ | (15.8) |  |  | $ | 2.4 |  |  | $ | 25.6 |  |  | $ | (19.5) |  |  | $ | 6.1 |
Developed technology and other | 3.8 | 101.0 |  |  | (81.6) |  |  | 19.4 |  |  | 94.4 |  |  | (48.9) |  |  | 45.5 |
Trademarks | 3.0 | 1.6 |  |  | (1.5) |  |  | 0.1 |  |  | 1.6 |  |  | (1.3) |  |  | 0.3 |
Technology licenses | 3.0 | 26.3 |  |  | (14.2) |  |  | 12.1 |  |  | $ | 24.9 |  |  | (4.8) |  |  | 20.1 |
IPR&D |  | 19.5 |  |  | — |  |  | 19.5 |  |  | $ | 35.9 |  |  | — |  |  | 35.9 |
Total intangible assets |  | $ | 166.6 |  |  | $ | (113.1) |  |  | $ | 53.5 |  |  | $ | 182.4 |  |  | $ | (74.5) |  |  | $ | 107.9 |
Schedule of Expected Amortization Expense | 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):
| 2021 |  | 2022 |  | 2023 |  | 2024 |  | 2025 |  | Thereafter
Amortization expense, cost of goods sold | $ | 6.0 |  |  | $ | 0.1 |  |  | $ | 0.1 |  |  | $ | 0.1 |  |  | $ | 0.1 |  |  | $ | 1.7 |
Amortization expense, operating expense | $ | 17.0 |  |  | $ | 5.0 |  |  | $ | 1.0 |  |  | $ | 1.0 |  |  | $ | 1.0 |  |  | $ | 0.9 |
Total amortization expense | $ | 23.0 |  |  | $ | 5.1 |  |  | $ | 1.1 |  |  | $ | 1.1 |  |  | $ | 1.1 |  |  | $ | 2.6 |

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