Cash, Cash Equivalents and Short-term Investments - Investments in Debt Securities by Contractual Maturities (Details) - USD ($) $ in Millions	Dec. 27, 2025	Jun. 28, 2025
Amortized Cost
Due within 1 year	$ 171.7	$ 139.9
Due in 1 year to 5 years	324.8	216.1
Total	496.5	356.0
Fair Value
Due within 1 year	171.9	140.0
Due in 1 year to 5 years	325.7	216.4
Total	$ 497.6	$ 356.4