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Fair Value of Financial Instruments - (Details) - USD ($) $ in Millions	Dec. 29, 2024	Jun. 30, 2024
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	$ 178.1	$ 97.3
Total short-term investments	790.8	1,128.7
Total assets	1,063.9	1,305.3
U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	338.8	552.7
Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	355.0	417.0
Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	85.0	100.8
Commercial paper
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	16.7
U.S. agency securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	10.0
Certificates of deposit
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	12.0	31.5
US corporation common stock
Assets, Fair Value Disclosure [Abstract]
US corporation common stock	95.0	79.3
Commercial paper
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	15.0	0.0
Money market funds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	149.1	87.3
Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	14.0	0.0
U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	10.0
Level 1
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	149.1	97.3
Total short-term investments	338.8	552.7
Total assets	582.9	729.3
Level 1 | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	338.8	552.7
Level 1 | Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 1 | Municipal bonds
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 | U.S. agency securities
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 | US corporation common stock
Assets, Fair Value Disclosure [Abstract]
US corporation common stock	95.0	79.3
Level 1 | Commercial paper
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	0.0
Level 1 | Money market funds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	149.1	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	0.0	10.0
Level 2
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	29.0	0.0
Total short-term investments	452.0	576.0
Total assets	481.0	576.0
Level 2 | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 2 | Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	355.0	417.0
Level 2 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	85.0	100.8
Level 2 | Commercial paper
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	16.7
Level 2 | U.S. agency securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	10.0
Level 2 | Certificates of deposit
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	12.0	31.5
Level 2 | US corporation common stock
Assets, Fair Value Disclosure [Abstract]
US corporation common stock	0.0	0.0
Level 2 | Commercial paper
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	15.0	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	14.0	0.0
Level 2 | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	$ 0.0	$ 0.0

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Fair value portion of asset recognized for present right to economic benefit.

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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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