Cash, Cash Equivalents and Short-term Investments - Investments in Debt Securities by Contractual Maturities (Details) - USD ($) $ in Millions	Dec. 28, 2024	Jun. 29, 2024
Amortized Cost
Due within 1 year	$ 265.8	$ 405.5
Due in 1 year to 5 years	151.6	46.2
Total	417.4	451.7
Fair Value
Due within 1 year	265.9	404.1
Due in 1 year to 5 years	151.1	46.2
Total	$ 417.0	$ 450.3