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Goodwill and Intangible Assets (Schedule of Intangible Assets Excluding Goodwill) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Oct. 02, 2020 | Sep. 27, 2019
Intangible Assets Excluding Goodwill [Line Items] |  |
Goodwill | $ 1,189,800 | $ 1,189,800
Gross carrying amount | 166,600 | 182,400
Accumulated amortization | (113,100) | (74,500)
Net carrying amount | $ 53,500 | 107,900
Customer Relationships [Member] |  |
Intangible Assets Excluding Goodwill [Line Items] |  |
Weighted average amortization period (years) | 5 years |
Gross carrying amount | $ 18,200 | 25,600
Accumulated amortization | (15,800) | (19,500)
Net carrying amount | $ 2,400 | 6,100
Developed Technology and Other [Member] |  |
Intangible Assets Excluding Goodwill [Line Items] |  |
Weighted average amortization period (years) | 3 years 9 months 18 days |
Gross carrying amount | $ 101,000 | 94,400
Accumulated amortization | (81,600) | (48,900)
Net carrying amount | 19,400 | 45,500
Trademarks [Member] |  |
Intangible Assets Excluding Goodwill [Line Items] |  |
Gross carrying amount | 1,600 | 1,600
Accumulated amortization | (1,500) | (1,300)
Net carrying amount | $ 100 | 300
Licensing Agreements [Member] |  |
Intangible Assets Excluding Goodwill [Line Items] |  |
Weighted average amortization period (years) | 3 years |
Gross carrying amount | $ 26,300 | 24,900
Accumulated amortization | (14,200) | (4,800)
Net carrying amount | 12,100 | 20,100
Accrued Liabilities | 11,500 | 20,100
In Process Research and Development [Member] |  |
Intangible Assets Excluding Goodwill [Line Items] |  |
Gross carrying amount | 19,500 | 35,900
Accumulated amortization | 0 | 0
Net carrying amount | $ 19,500 | $ 35,900
Trade Names [Member] |  |
Intangible Assets Excluding Goodwill [Line Items] |  |
Weighted average amortization period (years) | 3 years |

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