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Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Jun. 29, 2025	Jun. 30, 2024
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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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.

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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