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Fair Value of Financial Instruments - Summary (Details) - USD ($) $ in Millions	Mar. 27, 2022	Jun. 27, 2021
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	$ 306.3	$ 204.2
Total short-term investments	800.2	775.6
Total cash equivalents and short-term investments	1,106.5	979.8
Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	170.5	141.3
Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	466.1	459.5
U.S. agency securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	3.9	15.8
U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	98.7	72.5
Certificates of deposit
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	16.5
Commercial paper
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	29.0	50.0
Variable rate demand notes
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	24.6	20.0
Non-U.S. government securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	7.4	0.0
Money market funds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	167.3	96.9
Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	5.7	16.0
Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.6	0.0
U.S. agency securities
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	6.0
U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	72.5	0.0
Commercial paper
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	60.2	62.4
Variable rate demand notes
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	22.9
Level 1
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	239.8	96.9
Total short-term investments	98.7	72.5
Total cash equivalents and short-term investments	338.5	169.4
Level 1 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 1 | Corporate bonds
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 | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	98.7	72.5
Level 1 | Certificates of deposit
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 | Variable rate demand notes
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 1 | Non-U.S. government securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 1 | Money market funds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	167.3	96.9
Level 1 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	0.0
Level 1 | Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	0.0
Level 1 | U.S. agency securities
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	72.5	0.0
Level 1 | Commercial paper
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	0.0
Level 1 | Variable rate demand notes
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	0.0
Level 2
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	66.5	107.3
Total short-term investments	701.5	703.1
Total cash equivalents and short-term investments	768.0	810.4
Level 2 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	170.5	141.3
Level 2 | Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	466.1	459.5
Level 2 | U.S. agency securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	3.9	15.8
Level 2 | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 2 | Certificates of deposit
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	16.5
Level 2 | Commercial paper
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	29.0	50.0
Level 2 | Variable rate demand notes
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	24.6	20.0
Level 2 | Non-U.S. government securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	7.4	0.0
Level 2 | Money market funds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	0.0
Level 2 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	5.7	16.0
Level 2 | Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.6	0.0
Level 2 | U.S. agency securities
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	6.0
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	60.2	62.4
Level 2 | Variable rate demand notes
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	22.9
Level 3
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	0.0
Total short-term investments	0.0	0.0
Total cash equivalents and short-term investments	0.0	0.0
Level 3 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 3 | Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 3 | U.S. agency securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 3 | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 3 | Certificates of deposit
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 3 | Commercial paper
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 3 | Variable rate demand notes
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 3 | Non-U.S. government securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 3 | Money market funds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	0.0
Level 3 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	0.0
Level 3 | Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	0.0
Level 3 | U.S. agency securities
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	0.0
Level 3 | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	0.0
Level 3 | Commercial paper
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	0.0
Level 3 | Variable rate demand notes
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	$ 0.0	$ 0.0

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount 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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