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Investments - Schedule of Short-term Investments by Type (Details) - USD ($) $ in Millions | Sep. 28, 2025 | Jun. 29, 2025
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 354.9 | $ 489.6
Gross Unrealized Gains | 0.6 | 0.6
Gross Unrealized Losses | (1.1) | (2.0)
Estimated Fair Value | 354.4 | 488.2
U.S. treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 146.8 | 192.0
Gross Unrealized Gains | 0.1 | 0.1
Gross Unrealized Losses | 0.0 | 0.0
Estimated Fair Value | 146.9 | 192.1
Corporate bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 136.2 | 196.8
Gross Unrealized Gains | 0.3 | 0.3
Gross Unrealized Losses | (0.9) | (1.5)
Estimated Fair Value | 135.6 | 195.6
Municipal bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 60.9 | 79.5
Gross Unrealized Gains | 0.2 | 0.2
Gross Unrealized Losses | (0.2) | (0.5)
Estimated Fair Value | 60.9 | 79.2
Certificates of deposit |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 5.0 | 5.0
Gross Unrealized Gains | 0.0 | 0.0
Gross Unrealized Losses | 0.0 | 0.0
Estimated Fair Value | 5.0 | 5.0
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 6.0 | 16.3
Gross Unrealized Gains | 0.0 | 0.0
Gross Unrealized Losses | 0.0 | 0.0
Estimated Fair Value | $ 6.0 | $ 16.3

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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