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Revenue Recognition (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 26, 2025 | Sep. 27, 2024 | Sep. 29, 2023
Revenue from External Customer [Line Items] |  |  |
Revenue from contract with customer | $ 1,349,130 | $ 1,273,721 | $ 1,299,744
Revenue from contract with customer, percent | 100.00% | 100.00% | 100.00%
United States |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue from contract with customer | $ 496,990 | $ 450,265 | $ 466,030
Revenue from contract with customer, percent | 37.00% | 35.00% | 36.00%
International |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue from contract with customer | $ 852,140 | $ 823,456 |
Revenue from contract with customer, percent | 63.00% | 65.00% | 64.00%
Licensing |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue from contract with customer | $ 1,248,017 | $ 1,181,794 | $ 1,197,930
Revenue from contract with customer, percent | 93.00% | 93.00% | 92.00%
Revenue from contract with customer, licensing percent | 100.00% | 100.00% | 100.00%
Products and services |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue from contract with customer | $ 101,113 | $ 91,927 | $ 101,814
Revenue from contract with customer, percent | 7.00% | 7.00% | 8.00%
Broadcast |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue from contract with customer | $ 428,471 | $ 409,105 | $ 451,719
Revenue from contract with customer, licensing percent | 34.00% | 35.00% | 38.00%
Mobile |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue from contract with customer | $ 268,568 | $ 235,774 | $ 243,897
Revenue from contract with customer, licensing percent | 22.00% | 20.00% | 20.00%
CE |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue from contract with customer | $ 150,704 | $ 165,817 | $ 170,197
Revenue from contract with customer, licensing percent | 12.00% | 14.00% | 14.00%
PC |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue from contract with customer | $ 151,894 | $ 141,300 | $ 124,362
Revenue from contract with customer, licensing percent | 12.00% | 12.00% | 10.00%
Other |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenue from contract with customer | $ 248,380 | $ 229,798 | $ 207,755
Revenue from contract with customer, licensing percent | 20.00% | 19.00% | 18.00%

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