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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
	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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
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-Topic 230
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