Marketable Securities (Tables)

3 Months Ended

Dec. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

The Company's portfolio of available-for-sale marketable securities consists of the following (in millions):    

	Current				Noncurrent
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 notes	121.5		117.0		—		—
Municipal bonds	7.7		12.6		0.1		1.1
Total	$	137.0	$	137.2	$	3.5	$	7.1