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Fair Value of Financial Instruments - (Details) - USD ($) $ in Millions | Sep. 28, 2025 | Jun. 29, 2025
--- | --- | ---
Level 1 | Money market funds |  |
Assets: |  |
Total cash equivalents | $ 4.1 | $ 61.8
Level 1 | U.S. treasury securities |  |
Assets: |  |
Total cash equivalents | 207.3 | 224.6
Level 1 | MACOM Shares |  |
Assets: |  |
Total cash equivalents | 0.0 | 102.0
Level 2 | Municipal bonds |  |
Assets: |  |
Total cash equivalents | 61.6 | 79.2
Level 2 | Corporate bonds |  |
Assets: |  |
Total cash equivalents | 135.5 | 196.8
Level 2 | Commercial paper |  |
Assets: |  |
Total cash equivalents | 20.0 | 28.3
Level 2 | Certificates of deposit |  |
Assets: |  |
Total cash equivalents | $ 5.0 | $ 5.0

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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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