v3.26.1
Marketable Securities (Details) - USD ($)
$ in Millions
6 Months Ended
Apr. 03, 2026
Oct. 03, 2025
Debt Securities, Available-for-sale [Line Items]    
Marketable securities, current $ 8.5 $ 212.9
Marketable securities, noncurrent $ 14.6 14.2
Marketable securities, noncurrent, maximum contractual maturity 2 years  
U.S. Treasury and government securities    
Debt Securities, Available-for-sale [Line Items]    
Marketable securities, current $ 6.3 112.4
Marketable securities, noncurrent 12.7 14.2
Corporate bonds and notes    
Debt Securities, Available-for-sale [Line Items]    
Marketable securities, current 2.2 100.5
Marketable securities, noncurrent 1.5 0.0
Municipal bonds    
Debt Securities, Available-for-sale [Line Items]    
Marketable securities, current 0.0 0.0
Marketable securities, noncurrent $ 0.4 $ 0.0