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Marketable Securities
 3 Months Ended
Dec. 27, 2024
Investments, Debt and Equity Securities [Abstract]  
MARKETABLE SECURITIES
3.    MARKETABLE SECURITIES

The Company’s portfolio of available-for-sale marketable securities consists of the following (in millions):    
CurrentNoncurrent
December 27, 2024September 27, 2024December 27, 2024September 27, 2024
U.S. Treasury and government securities$45.4 $39.0 $15.5 $11.1 
Corporate bonds and notes91.3 155.0 0.1 0.3 
Municipal bonds— 0.1 — — 
Total marketable securities$136.7 $194.1 $15.6 $11.4 
The contractual maturities of noncurrent available-for-sale marketable securities were within two years or less of issuance of the applicable securities. Neither gross unrealized gains and losses nor realized gains and losses were material as of December 27, 2024, or September 27, 2024.