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Goodwill And Intangible Assets | 3 Months Ended
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Dec. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND INTANGIBLE ASSETS | 7. GOODWILL AND INTANGIBLE ASSETS There were no changes to the carrying amount of goodwill during the three months ended December 30, 2022. 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 months ended December 30, 2022. Intangible assets consist of the following (in millions):
|  | As of |  | As of
| Weighted Average Amortization Period (Years) | December 30, 2022 |  | September 30, 2022
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Customer relationships and backlog | 2.3 | $ | 154.6 |  |  | $ | (143.9) |  |  | $ | 10.7 |  |  | $ | 154.6 |  |  | $ | (122.3) |  |  | $ | 32.3 |
Developed technology and other | 6.0 | 1,288.6 |  |  | (253.6) |  |  | 1,035.0 |  |  | 1,280.9 |  |  | (209.2) |  |  | 1,071.7 |
Technology licenses | 2.7 | 74.3 |  |  | (20.1) |  |  | 54.2 |  |  | 105.1 |  |  | (45.2) |  |  | 59.9 |
In-process research and development |  | 273.1 |  |  | — |  |  | 273.1 |  |  | 280.8 |  |  | — |  |  | 280.8 |
Total intangible assets |  | $ | 1,790.6 |  |  | $ | (417.6) |  |  | $ | 1,373.0 |  |  | $ | 1,821.4 |  |  | $ | (376.7) |  |  | $ | 1,444.7 |
Fully amortized intangible assets are eliminated from both the gross and accumulated amortization amounts in the first quarter of each fiscal year. During the three months ended December 30, 2022, $7.7 million of in-process research and development (“IPR&D”) assets were transferred to definite-lived intangible assets, and are being amortized over their useful lives of 12.0 years. Amortization expense related to definite-lived intangible assets was $72.0 million and $80.0 million for the three months ended December 30, 2022 and December 31, 2021, respectively. 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 2023 |  | 2024 |  | 2025 |  | 2026 |  | 2027 |  | Thereafter
Amortization expense | $ | 153.9 |  |  | $ | 178.3 |  |  | $ | 154.9 |  |  | $ | 127.0 |  |  | $ | 111.7 |  |  | $ | 374.1 |

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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 https://asc.fasb.org/topic&trid=2144416 + Details
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