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Fair Value of Financial Instruments - Summary (Details) - USD ($) $ in Millions	Sep. 25, 2022	Jun. 26, 2022
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	$ 283.4	$ 244.3
Total short-term investments	675.6	749.3
Total cash equivalents and short-term investments	959.0	993.6
Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	416.9	448.0
Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	150.7	162.2
U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	55.3	65.8
Variable rate demand notes
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	50.8	69.4
U.S. agency securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	1.9	3.9
Money market funds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	123.1	115.9
U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	117.7	69.0
Commercial paper
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	41.9	59.4
Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.7	0.0
Level 1
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	240.8	184.9
Total short-term investments	55.3	65.8
Total cash equivalents and short-term investments	296.1	250.7
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 | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	55.3	65.8
Level 1 | Variable rate demand notes
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 | Money market funds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	123.1	115.9
Level 1 | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	117.7	69.0
Level 1 | Commercial paper
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 2
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	42.6	59.4
Total short-term investments	620.3	683.5
Total cash equivalents and short-term investments	662.9	742.9
Level 2 | Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	416.9	448.0
Level 2 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	150.7	162.2
Level 2 | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	0.0	0.0
Level 2 | Variable rate demand notes
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	50.8	69.4
Level 2 | U.S. agency securities
Assets, Fair Value Disclosure [Abstract]
Total short-term investments	1.9	3.9
Level 2 | Money market funds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.0	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	41.9	59.4
Level 2 | Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total cash equivalents	0.7	0.0
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 | Corporate bonds
Assets, Fair Value Disclosure [Abstract]
Total 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 | U.S. treasury securities
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 | U.S. agency 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 | 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 | Corporate bonds
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 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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