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Fair Value of Financial Instruments (Details) - USD ($) $ in Millions | Jun. 29, 2025 | Jun. 30, 2024
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Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | $ 107.5 | $ 97.3
Total short-term investments | 488.2 | 1,128.7
Total current assets | 102.0 | 0.0
Total other long-term investments | 0.0 | 79.3
Total assets | 697.7 | 1,305.3
Corporate bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 195.6 | 417.0
U.S. treasury securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 192.1 | 552.7
Municipal bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 79.2 | 100.8
Certificates of deposit |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 5.0 | 31.5
U.S. agency securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 0.0 | 10.0
Commercial paper |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 16.3 | 16.7
MACOM Shares |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total current assets | 102.0 | 0.0
Total other long-term investments | 0.0 | 79.3
Money market funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | 61.8 | 87.3
Corporate bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | 1.2 | 0.0
U.S. treasury securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | 32.5 | 10.0
Commercial paper |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | 12.0 | 0.0
Level 1 |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | 94.3 | 97.3
Total short-term investments | 192.1 | 552.7
Total current assets | 102.0 | 0.0
Total other long-term investments | 0.0 | 79.3
Total assets | 388.4 | 729.3
Level 1 | Corporate bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 0.0 | 0.0
Level 1 | U.S. treasury securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 192.1 | 552.7
Level 1 | Municipal bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 0.0 | 0.0
Level 1 | Certificates of deposit |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 0.0 | 0.0
Level 1 | U.S. agency securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 0.0 | 0.0
Level 1 | Commercial paper |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 0.0 | 0.0
Level 1 | MACOM Shares |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total current assets | 102.0 | 0.0
Total other long-term investments | 0.0 | 79.3
Level 1 | Money market funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | 61.8 | 87.3
Level 1 | Corporate bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | 0.0 | 0.0
Level 1 | U.S. treasury securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | 32.5 | 10.0
Level 1 | Commercial paper |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | 0.0 | 0.0
Level 2 |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | 13.2 | 0.0
Total short-term investments | 296.1 | 576.0
Total current assets | 0.0 | 0.0
Total other long-term investments | 0.0 | 0.0
Total assets | 309.3 | 576.0
Level 2 | Corporate bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 195.6 | 417.0
Level 2 | U.S. treasury securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 0.0 | 0.0
Level 2 | Municipal bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 79.2 | 100.8
Level 2 | Certificates of deposit |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 5.0 | 31.5
Level 2 | U.S. agency securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 0.0 | 10.0
Level 2 | Commercial paper |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total short-term investments | 16.3 | 16.7
Level 2 | MACOM Shares |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total current assets | 0.0 | 0.0
Total other long-term investments | 0.0 | 0.0
Level 2 | Money market funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | 0.0 | 0.0
Level 2 | Corporate bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | 1.2 | 0.0
Level 2 | U.S. treasury securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | 0.0 | 0.0
Level 2 | Commercial paper |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total cash equivalents | $ 12.0 | $ 0.0

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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