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Goodwill & Intangible Assets (Details) - USD ($) $ in Thousands |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 19, 2024 | Apr. 28, 2023 | Jan. 31, 2022 | Sep. 26, 2025 | Sep. 27, 2024 | Sep. 29, 2023
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill |  |  |  | $ 533,208 | $ 408,409 |
Goodwill, Acquired During Period |  |  |  |  | 120,667 |
Goodwill, Foreign Currency Translation and Measurement Period Adjustments |  |  |  | 1,757 | 4,132 |
Goodwill, Measurement Period Adjustment |  |  |  |  | (5,065) |
Goodwill |  |  |  | 529,900 | 533,208 | $ 408,409
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Cost |  |  |  | 831,921 | 823,093 |
Accumulated Amortization |  |  |  | (434,864) | (388,579) |
Net |  |  |  | 397,057 | 434,514 |
Payments to acquire intangible assets |  |  |  | $ 5,600 |  |
Weighted-average useful life |  |  |  | 14 years |  |
Amortization of intangible assets |  |  |  | $ 45,300 | 33,200 | $ 28,600
GE Licensing |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill | $ 75,387 |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Payments to acquire intangible assets |  |  |  |  | 274,200 |
Weighted-average useful life | 11 years |  |  |  |  |
MPEG LA, L.L.C. |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill |  | $ 40,579 |  | (20,300) |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Weighted-average useful life |  | 12 years |  |  |  |
THEO Technologies |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill |  |  | $ 39,900 |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Payments to acquire intangible assets |  |  |  |  | 24,600 |
Acquired patents and technology |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Cost |  |  |  | 587,743 | 579,768 |
Accumulated Amortization |  |  |  | (324,507) | (293,389) |
Net |  |  |  | 263,236 | 286,379 |
Customer relationships |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Cost |  |  |  | 221,007 | 220,200 |
Accumulated Amortization |  |  |  | (87,401) | (72,374) |
Net |  |  |  | 133,606 | 147,826 |
Other intangibles |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Cost |  |  |  | 23,171 | 23,125 |
Accumulated Amortization |  |  |  | (22,956) | (22,816) |
Net |  |  |  | $ 215 | $ 309 |

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