Cash, Cash Equivalents and Short-term Investments - Cash, Cash Equivalents and Short-term Investments (Details) - USD ($) $ in Millions	Dec. 27, 2025	Jun. 28, 2025
Cash equivalents
Cash	$ 460.1	$ 349.5
Total cash and cash equivalents	657.7	520.7
Short-term investments:
Amortized Cost	496.5	356.0
Gross Unrealized Gains	1.2	0.5
Gross Unrealized Losses	(0.1)	(0.1)
Fair Value	497.6	356.4
Commercial paper
Short-term investments:
Amortized Cost	24.6	2.7
Gross Unrealized Gains	0.0	0.0
Gross Unrealized Losses	0.0	0.0
Fair Value	24.6	2.7
Corporate debt securities
Short-term investments:
Amortized Cost	275.3	210.9
Gross Unrealized Gains	0.8	0.3
Gross Unrealized Losses	(0.1)	(0.1)
Fair Value	276.0	211.1
U.S. Agency securities
Short-term investments:
Amortized Cost	137.0	67.6
Gross Unrealized Gains	0.2	0.1
Gross Unrealized Losses	0.0	0.0
Fair Value	137.2	67.7
U.S. Treasury securities
Short-term investments:
Amortized Cost	59.6	74.8
Gross Unrealized Gains	0.2	0.1
Gross Unrealized Losses	0.0	0.0
Fair Value	59.8	74.9
Certificates of deposit
Cash equivalents
Cash equivalents:	31.3
Money market funds
Cash equivalents
Cash equivalents:	74.6	161.7
U.S. Treasury securities
Cash equivalents
Cash equivalents:	$ 91.7
Commercial paper
Cash equivalents
Cash equivalents:		2.5
U.S. Agency securities
Cash equivalents
Cash equivalents:		$ 7.0