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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Mar. 28, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets Excluding Goodwill | Intangible assets consist of the following (in millions):
|  | As of
| Weighted Average Amortization Period (Years) | March 28, 2025 |  | September 27, 2024
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Developed technology and other | 6.4 | $ | 1,388.6 |  |  | $ | (602.7) |  |  | $ | 785.9 |  |  | $ | 1,379.6 |  |  | $ | (540.7) |  |  | $ | 838.9 |
Technology licenses | 3.2 | 106.6 |  |  | (64.4) |  |  | 42.2 |  |  | 75.0 |  |  | (48.8) |  |  | 26.2 |
In-process research and development |  | 10.7 |  |  | — |  |  | 10.7 |  |  | 35.4 |  |  | — |  |  | 35.4 |
Total intangible assets |  | $ | 1,505.9 |  |  | $ | (667.1) |  |  | $ | 838.8 |  |  | $ | 1,490.0 |  |  | $ | (589.5) |  |  | $ | 900.5 |
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 2025 |  | 2026 |  | 2027 |  | 2028 |  | 2029 |  | Thereafter
Amortization expense | $ | 86.8 |  |  | $ | 152.7 |  |  | $ | 136.6 |  |  | $ | 107.5 |  |  | $ | 90.0 |  |  | $ | 254.5 |

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