Fair Value (Tables)

3 Months Ended

Jan. 01, 2021

Fair Value Disclosures [Abstract]

Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis

Assets and liabilities recorded at fair value on a recurring basis consisted of the following (in millions):         

	As of January 1, 2021								As of October 2, 2020
			Fair Value Measurements								Fair Value Measurements
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
Assets
Cash and cash equivalents*	$	617.2	$	602.4	$	14.8	$	—	$	566.7	$	561.2	$	5.5	$	—
U.S. Treasury and government securities	129.1		38.1		91.0		—		134.4		43.2		91.2		—
Corporate bonds and notes	258.1		—		258.1		—		276.8		—		276.8		—
Municipal bonds	14.9		—		14.9		—		2.1		—		2.1		—
Total	$	1,019.3	$	640.5	$	378.8	$	—	$	980.0	$	604.4	$	375.6	$	—