Cash, Cash Equivalents and Short-Term Investments - Schedule of cash, cash equivalents and short-term investments (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 24, 2023	Jun. 25, 2022
Cash and Cash Equivalents [Line Items]
Amortized Cost	$ 9.8	$ 54.0
Cash [Member]
Cash and Cash Equivalents [Line Items]
Amortized Cost	853.9	811.9
Gross unrealized gain (loss)	0.0	0.0
Fair Value	853.9	811.9
Certificates of Deposit [Member]
Cash and Cash Equivalents [Line Items]
Amortized Cost	0.2	2.4
Gross unrealized gain (loss)	0.0	0.0
Fair Value	0.2	2.4
Money Market Funds [Member]
Cash and Cash Equivalents [Line Items]
Amortized Cost	54.4	12.1
Gross unrealized gain (loss)	0.0	0.0
Fair Value	54.4	12.1
Treasury bills [Member]
Cash and Cash Equivalents [Line Items]
Amortized Cost	16.4	0.0
Gross unrealized gain (loss)	0.0	0.0
Fair Value	16.4	0.0
Short-Term Investments [Member]
Cash and Cash Equivalents [Line Items]
Amortized Cost	9.8	54.0
Gross unrealized gain (loss)	(0.2)	(2.0)
Fair Value	9.6	52.0
Corporate Debt Securities [Member]
Cash and Cash Equivalents [Line Items]
Amortized Cost	6.5	43.7
Gross unrealized gain (loss)	(0.2)	(1.9)
Fair Value	6.3	41.8
Municipal Bonds [Member]
Cash and Cash Equivalents [Line Items]
Amortized Cost	3.1	7.9
Gross unrealized gain (loss)	0.0	(0.1)
Fair Value	3.1	7.8
Cash and Cash Equivalents [Member]
Cash and Cash Equivalents [Line Items]
Amortized Cost	924.7	824.0
Gross unrealized gain (loss)	0.0	0.0
Fair Value	$ 924.7	$ 824.0