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Cash, Cash Equivalents and Short-Term Investments - Schedule of cash, cash equivalents and short-term investments (Details) - USD ($) $ in Millions | 3 Months Ended
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Sep. 30, 2023 | Jun. 24, 2023
Cash ,Cash Equivalents & Short Term Investments |  |
Amortized Cost | $ 23.2 | $ 9.8
Corporate Debt Securities [Member] |  |
Cash ,Cash Equivalents & Short Term Investments |  |
Amortized Cost | 5.6 | 6.5
Gross unrealized loss | (0.1) | (0.2)
Fair Value | 5.5 | 6.3
Cash [Member] |  |
Cash ,Cash Equivalents & Short Term Investments |  |
Amortized Cost | 323.6 | 853.9
Gross unrealized loss | 0.0 | 0.0
Fair Value | 323.6 | 853.9
Money Market Funds [Member] |  |
Cash ,Cash Equivalents & Short Term Investments |  |
Amortized Cost | 426.7 | 54.4
Gross unrealized loss | 0.0 | 0.0
Fair Value | 426.7 | 54.4
Certificates of Deposit [Member] |  |
Cash ,Cash Equivalents & Short Term Investments |  |
Amortized Cost | 51.0 | 0.2
Gross unrealized loss | 0.0 | 0.0
Fair Value | 51.0 | 0.2
Treasury bills [Member] |  |
Cash ,Cash Equivalents & Short Term Investments |  |
Amortized Cost | 16.6 | 16.4
Gross unrealized loss | 0.0 | 0.0
Fair Value | 16.6 | 16.4
Municipal Bonds [Member] |  |
Cash ,Cash Equivalents & Short Term Investments |  |
Amortized Cost | 1.0 | 3.1
Gross unrealized loss | 0.0 | 0.0
Fair Value | 1.0 | 3.1
Cash and Cash Equivalents [Member] |  |
Cash ,Cash Equivalents & Short Term Investments |  |
Amortized Cost | 801.3 | 924.7
Gross unrealized loss | 0.0 | 0.0
Fair Value | 801.3 | 924.7
Short-Term Investments [Member] |  |
Cash ,Cash Equivalents & Short Term Investments |  |
Amortized Cost | 23.2 | 9.8
Gross unrealized loss | (0.1) | (0.2)
Fair Value | $ 23.1 | $ 9.6

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