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Marketable Securities
 3 Months Ended
Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]  
MARKETABLE SECURITIES MARKETABLE SECURITIES
The Company's portfolio of available-for-sale marketable securities consists of the following (in millions):    
CurrentNoncurrent
Available-for-sale:December 31,
2021		October 1,
2021		December 31,
2021		October 1,
2021
U.S. Treasury and government $7.8 $7.6 $3.4 $6.0 
Corporate bonds and notes121.5 117.0 — — 
Municipal bonds7.7 12.6 0.1 1.1 
Total$137.0 $137.2 $3.5 $7.1 
The contractual maturities of noncurrent available-for-sale marketable securities were due within two years or less. Neither gross unrealized gains and losses nor realized gains and losses were material as of December 31, 2021, and October 1, 2021, respectively.