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Investments - Contractual Maturities of Marketable Investments (Details) - USD ($) $ in Millions | Sep. 25, 2022 | Jun. 26, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Within One Year | $ 206.2 |
After One, Within Five Years | 418.6 |
After Five, Within Ten Years | 14.7 |
After Ten Years | 36.1 |
Total | 675.6 | $ 749.3
Corporate bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Within One Year | 124.5 |
After One, Within Five Years | 292.4 |
After Five, Within Ten Years | 0.0 |
After Ten Years | 0.0 |
Total | 416.9 | 448.0
Municipal bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Within One Year | 52.3 |
After One, Within Five Years | 98.4 |
After Five, Within Ten Years | 0.0 |
After Ten Years | 0.0 |
Total | 150.7 | 162.2
U.S. treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Within One Year | 29.4 |
After One, Within Five Years | 25.9 |
After Five, Within Ten Years | 0.0 |
After Ten Years | 0.0 |
Total | 55.3 | 65.8
Variable rate demand notes |  |
Debt Securities, Available-for-sale [Line Items] |  |
Within One Year | 0.0 |
After One, Within Five Years | 0.0 |
After Five, Within Ten Years | 14.7 |
After Ten Years | 36.1 |
Total | 50.8 | 69.4
U.S. agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Within One Year | 0.0 |
After One, Within Five Years | 1.9 |
After Five, Within Ten Years | 0.0 |
After Ten Years | 0.0 |
Total | $ 1.9 | $ 3.9

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