Marketable Securities (Tables)

12 Months Ended

Sep. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Debt Securities, Available-for-sale

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

	Current				Noncurrent
	September 30, 2022		October 1, 2021		September 30, 2022		October 1, 2021
U.S. Treasury and government	$	13.1	$	7.6	$	0.5	$	6.0
Corporate bonds and notes	0.2		117.0		—		—
Municipal bonds	7.0		12.6		—		1.1
Total marketable securities	$	20.3	$	137.2	$	0.5	$	7.1