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Goodwill And Intangible Assets | 6 Months Ended
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Apr. 02, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND INTANGIBLE ASSETS | GOODWILL AND INTANGIBLE ASSETS There were no changes to the carrying amount of goodwill during the three and six months ended April 2, 2021. The Company tests its goodwill for impairment annually as of the first day of its fourth fiscal quarter and in interim periods if certain events occur indicating the carrying value of goodwill may be impaired. There were no indicators of impairment noted during the three and six months ended April 2, 2021. 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 |
Fully amortized intangible assets are eliminated from both the gross and accumulated amortization amounts in the first quarter of each fiscal year. 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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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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